1. Начальная страница
BGH (Boschgotthardshütte) produces specialty steel and specialty alloys for most
demanding applications. The company has a 500 year history, and was already mentioned as
the so-called "Hammer an der Ferndorf" at the gates of Siegen in 1467.
For centuries, forging was the main occupation of the company. Today BGH uses a variety of
modern technologies to produce a wide range of products and grades - even in small lot sizes.
BGH is a medium sized, owner-managed company whose development is characterized by
consistence and market-orientation. Many customers appreciate our competent and friendly
technical service as well as our wide range of stocked items.
BGH products are utilized worldwide: No matter if industrial application or in direct service for human
beings, you can find BGH specialty steel in many areas.
We invite you to visit our website and get an impression of our superior range of products and the
capability of our company.
2. Delivery programme
We offer an almost complete programme of special steel products. Major investments in hot and
cold forming, heat treatment and machining allow BGH to supply even small lot sizes. Our wide
grade range covers all un-, low and high alloyed steel types up to special grades.
2.1 Grades
We offer an almost complete range of material.
Our steel range includes all unalloyed, low and high alloyed steel types, special grades and Nickel
based alloys. The tightest analysis as well as high purity requirements and special micostructue
adjustments to master wear resistance, temperature stability and corrosion resistance. Should you
however not yet have found the ideal material, we would be glad to help you. Your application is our
task.
Please find as follows an overview of grades produced at BGH:
Tempering steels
Case hardening steels
Nitriding steels
Hot rolled steels for tempered springs
Anti-friction bearing steels
High-temperature and heat resistant steels
Rolled or forged high-temperature weldable steel bars
Tool steels, including high-speed steels
Stainless steels
Stainless steels for medical equipment
Stainless steels for surgical implants
Valve materials
Non-magnetic steels
Heat resistant steels
High-alloyed filler materials
Nickel-based alloys
2.2 Long products
Crude Steel
BGH melts approximately 800 different steel grades in two state-of-the-art electric powered steel
works. The supply with scrap and required alloy elements is secured by RPS in Siegen which is part
of the BGH group.
In Siegen, the melted steel is further processed in terms of ingots, in Freital as ingots and horizontal
continuous castings.
Forged products
Today's BGH group started with a forging shop in 1467. Therefore, it is understandable that forged
products still form the major part of the volume produced. Thereof forged long products represent
the product range with the main sales volume. These are manufactured at the sites Siegen,
Lippendorf and Freital.
Form
round
hexagon
flat
Rolling products
Dimension
Surface Condition
24 - 300 mm
untreated or peeled
301 - 900 mm
untreated or turned
55 - 105 mm
untreated or ground
width: 14 - 320 mm
thickness: 10 - 190 mm
max. ratio
width : thickness 10 : 1
untreated, shot blasted or ground
By acquiring Sächsische Edelstahlwerke in 1993, the forging technolgy was extended to the rolling
technology which has continuously been improved by regular investments and innovations. A logical
consequence of this product portfolio expansion was the acquisition of the flat rolling mill in
Katowice, today's BGH Polska.
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Semifinished products
Bars
Wire rod
Bright Steel
Two steel mills form the basis of the pre-material supply for our bright steel production.
Besides well-educated experts, BGH Edelstahl Lugau GmbH and BGH Feindraht
GmbHdispose of up-to-date production equipment.
We produce steel bars with modern drawing benches with straightening units as well as precision
grinding and polishing machines with laser surveillance. Due to continuously optimizing our
machineries, we are able to achieve an improvement in our product quality and a higher efficiency in
manufacturing.
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Bars
Condition
Drawn, ground, polished
Dawn, annealed, straightened
Peeled
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Wire
Condition
Specialties
Bright drawn
Drawn, bright annealed
Bright annealed
soft stretch reduced
by roll drawing
tolerance zone 6
upon request
bright drawn
residue-free
bright drawn
light-colored
coated
stretch
reduced by rolldrawing
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Fine wire
2.3 Open-die parts
light-colored bright
surface
Forged products in different sizes and shapes are produced at BGH Siegen and Lippendorf.
Throughout our 500 year history, open die forging has been developed as one of the central
features within the BGH group, and is now a highly sophisticated and technologically
advanced manufacturing method.
Ingots produced in our own melting furnace are formed into shape using modern hydraulic presses.
Our two steel mills, using high performance electro-arc furnaces with 42 / 45 tons capacities, allow
us to uniquely produce a wide range of quality products.
Further metallurgical treatment takes place in ladle furnaces and vacuum facilities using AOD or
VOD methods. Materials requiring even higher levels of cleanliness are melted in a 7.5 tons vacuum
induction furnace at BGH Lippendorf. ESR and PESR capabilities are available as well.
Our forged products are used in many different applications, from mixing shafts in the chemical and
food industries, towing bars in the offshore sector, mandrels in tube manufacturing to guide rods in
the manufacturing of industrial presses.
BGH supplies the following forging products:
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Flanges
During the past years, BGH has continuously improved and modernized its flange
production. Today, high quality flanges can be manufactured in an efficient manner. Among
our strengths is our ability to manufacture large diameter and large cross section rings.
Modern heat treatment facilities, including the ability to anneal large pieces allows BGH to ensure
the highest possible quality of our products. We manufacture flanges from all common carbon,
stainless, heat and acid resistance steels, Duplex steels and Nickel based alloys.
Our wide range of machining capabilities allows BGH to turn and drill rings and flanges with an
outside diameter up to 6,000 mm. We produce flanges in accordance to DIN 28031 up to DIN 28039
and according to individual customer specifications and drawings.
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Open-die forgings
Besides being an important technology for shaping steel, open die forging as well improves
the forged steel quality by transforming the cast structure and closing and fusing any voids
which may be present in the steel.
Specific ingots are selected by our steel departments at BGH's forging mills. These ingots are
selected to produce high quality forgings for highly demanding customer applications in the
engineering, chemical, energy, power generation and ship building sectors.
BGH can deliver forgings in both rough and finished machined condition.
The availability of a 20 MN and 40 MN open-die forging presses as well as a GFM, enables us to
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use ingots of up to 40 tons unit weight
produce forgings with unit weights of 30 tons
realise diameters of 90 - 900 mm by hammer forging
produce bigger parts of up to 10,5 tons unit weight by upset forging
forge long forging products of up to 18 m and 8 tons unit weight
carry out hollow forgings with an inner diameter of 350 - 900 mm and a forging weight of up
to 18 tons.
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Cold rolls
With centuries of experience in the production and processing of high quality steel, BGH has
also developed into an important producer of cold rolls. Our cold rolls are manufactured to
the highest quality standards, ensuring that they specifically meet the demands required at
their end use applications.
Modern production facilities and the systematic supervision of the production process guarantee a
high level of quality.
Our delivery programme includes forged and hardened working, intermediate and back up rolls for
rolling in duo-, quattro-, sexto and multiple roller scaffolds, as well as guide pulleys, straight rolls and
rolls for strip processing lines.
Cold rolls are produced in the following sizes:
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Barrel diameter up to 800 mm
Total length up to 4,800 mm
Barrel length up to 3,200 mm
Individual weight of up to 10,500 kg
Upon request, BGH’s cold rolls can be supplied with hardened journals, labyrinth rings and bearing
seatings.
Depending on the cold roll application we can supply rolls produced from the following steel grades:
- Grade 1.2327 as 2% and 1.2375 as 3% chrome steels with Mo and V for rolls with hard and wear
resistant surface and high tenacity
- Or grade 1.2362, 1.2631 mod. as tempering resistant 5% and 7.5 % chrome steel, for higher
requirements on rolled pieces which are more difficult to reduce.
The cleanliness of machined steel is excellent as we only use vacuum degassed electro steel from
the purest raw material.
BGH uses electro slag remelted (ESR) steel for high requirements. ESR steel allows highest tenacity
and fatigue resistance and guarantees a surface quality (cleanliness) which cannot be achieved with
regular molten steel.
The right heat treatment is essential to ensure the capability of cold rolls. We have modern heat
treatment facilities at our disposal, which allow us to achieve every surface hardness and hardness
penetration depth that may be required by the customer.
Furthermore we offer
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rehardening of working and back up rolls
maintenance and alteration of rolls
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Rings and discs
BGH Lippendorf is a specialised producer of forged parts up to 10 tons in weight. Eccentric
and flanged shafts can be supplied fully machined.
Circular forged components have become a main focus of BGH Lippendorf.
These include:
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Open die seamless forged rings and nuts
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Forged cylinders
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Eccentric forged boxes
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Circular blanks and casings
Production range of rings and discs:
Rings
Circular blanks
Stepped shafts
Flanged shafts
3. Company
3.1 Holding
The holding „BGH Edelstahlwerke GmbH“ unites all independent subsidiaries.
BGH Edelstahlwerke GmbH takes over central services for its subsidiaries such as:
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Sales
Materials Engineering
Technical Marketing
Product Management
Controlling
Human Resources
Finance
Salary and Wage Accounting
Quality Management
Information Management / Communication Technology
Despite of their different historical developments, all locations have reached a unified high potential
in experience regarding the production and processing of specific use-related special steels.
3.2 Subsidiaries
 BGH Edelstahl Freital GmbH
 The prime location at an important railway as well as the Erzgebirge’s coal and ore deposits
were the reason for settling a cast steel mill in Döhlen, which is today a district of Freital and
8 km south-west of Dresden. Over the years, the mill had grown into a considerable steel
plant. In consequence of
World War II, the mill had been disassembled completely to carry out repair work.
With a tremendous performance in reconstruction during the following years, a new steel
plant originated assigned to supply the GDR with special steel.
1993 BGH acquired the back then called Sächsische Edelstahlwerke GmbH (SEW). BGH
Edelstahl Freital GmbH is the biggest site of the BGH group. Since the rolling technology has
always been the main focus of BGH Freital, considerable investments were made to install a
combined bar-wire mill and modernize the blooming mill to upgrade this production field. A
modern electro arc furnace in our steelwork feeds the newly constructed horizontal
continuous casting plant, which is among the most modern ones worldwide.
A lot of new equipment has been installed in the forging, annealing and finishing
departments as well.
A part of Freital’s products are used as pre-material for other BGH mills. Forged blooms are
delivered to Lippendorf and Siegen, wire rod and steel bars to our drawing mill Lugau.
Continuous castings and rolled billets are delivered to our flat rolling mill in Katowice for
rolling out. The flange production in Lippendorf is as well supplied with pre-material from the
Freital rolling mill.
To be able to react more flexible to customer requirements, two warehouses have been built
over the past two years covering a huge range of products in various sizes and grades.
In your everyday life you can find products made of special steel from Freital in many places.
Among those are high quality cutting tools and cutlery, die and pressing tools, drilling
machines and cutters for tooling industries, shafts and pump parts for engineering, axles and
steering parts for the automotive industry, pistons and bolts for combustion engines, turbine
blades for power plants.
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BGH Edelstahl Siegen GmbH
BGH (“Boschgotthardshütte") Siegen was already mentioned in 1467 as the so-called
“Hammer an der Ferndorf”.
Back then the “Siegerland” disposed of an iron ore – Siderit – whose natural Manganese
content gave great formability to the iron gained out of it.
Owing to this gift of nature, the cradle of forging craft is in the “Siegerland”.
Back then and in the following years, forging was the main task of the Boschgotthardshütte.
Only in the 60s of the 20th century, the forging shop was supplemented by adding an own
raw steel production that is mainly focused on high-alloyed special steels and high-grade
structural steel. BGH Edelstahl Siegen GmbH, emanated from the Boschgotthardshütte, is
divided into the locations Siegen-Eintracht and Siegen-Weidenau, which are approximately 8
km apart from each other. Both locations are embedded in the townscape.
At the mill “Eintracht” you can find the steel mill as well as a 40 MN forging press a heat
treatment and finishing shop. The forging machine (GFM RF 45 + 20 MN press) and another
20 MN forging press are installed at our mill “Weidenau”. Both forging lines have
downstream heat treatment and finishing facilities. Numerous turning, drilling and milling
machines for mechanical machining are installed at this place as well. Our modern bar stock
with approximately 20,000 tons of stocked material is set up in Weidenau also.
The domain of BGH Edelstahl Siegen GmbH are forged steel bars and open-die forgings
with weights of up to 32 tons per piece.
Among our customers are in particular industries that require highest quality. Besides the
power plant industry, we supply steel for mechanical, plant and drive engineering as well as
compactor industries.
Similar demanding products are used in the offshore industry and wind power technology.
 BGH Edelstahl Lippendorf GmbH
GH Edelstahl Lippendorf GmbH evolved from the merger of former BGH Leuna and Werkstoffunion
Lippendorf. Hence a state-of-the-art forging and flange production mill was established
approximately 20 km south of Leipzig.
The long-time experience in open-die forging of complex geometries complemented by considerable
investments in new forging technologies led to a competitive and future-oriented metallurgical mill.
Open-die forgings with a weight of up to 3.5 t, such as coils and circular blanks, eccentric forged
shafts and flanges are produced with most modern open-die forging presses in many common and
special steels and alloys.
Beyond that, necessary heat treatment facilities, like water, polymer and oil baths are available at
Lippendorf. The mechanical machining is carried out by various machining facilities.
Besides the forging department, BGH Lippendorf runs a special steelwork to melt Nickel-based
alloys and other high-sensitive special grades. To improve the steel's purity, ESR and PESR
procedures are used.
Another product of Lippendorf are butt-welded flanges that are mainly used for tower building in wind
power stations.
Lippendorf’s products are used in mechanical and apparatus engineering, chemical, paper and
plastics industries as well as gear manufacturing for wind power stations.
Promptness and flexibility as well as huge know-how in material application and forging techniques
are the advantages of our company.
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BGH Edelstahl Lugau GmbH
BGH Edelstahl Lugau GmbH has a long tradition to look back on in producing bright steel. Founded
1924 as engineering works; the local mill started its bright steel production of in the 1930s. Since
1960 stainless steel, valve steel and wire have been part of the production program. After
privatization and incorporation into the BGH-group, the product range has been changed
significantly: Instead of producing ordinary steel, BGH Lugau started to focus on the manufacture of
bright steel products for specific applications.
The know-how generated on-size in many years combined with modern and all-round plant
engineering enable us to produce bright steel and drawn wire in high-grade and special steels to an
advanced level of technology and quality.
Owing to the long-time experience of our employees, the processing of difficult grades is not a
problem.
The main focus of Lugau’s production line is drawing wire in sizes ranging from 0.7 mm to 20 mm.
The wire is either cold drawn from wire to wire or wire to bar. Hot drawing is used as special
technology with material which is difficult to deform, such as high-speed-steel. Bright steel bars are
produced in a size range of 1 to 80 mm with a peeled, ground and polished surface using the coil-tobar and bar-to-bar method.
Our goal is to meet highest requirements in size, shape and tolerances, surface quality, straightness
and material properties. Predominantly, steel bars and wire rod from BGH Edelstahl Freital are used
as pre-material. Besides the production of wire, wire rod coils from BGH Freital are pickled in Lugau
and directly shipped to wire rod customers.
Another domain of the local production is mechanically machining and heat treatment of cold rolls.
The surface of cold rolls is inductively hardened and tempered. BGH Lugau’s sister companies in
Siegen and Lippendorf supply forged blanks necessary for the cold roll production.
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BGH Polska Sp. z o.o.
Bars in flat and square sections are the specialty of BGH Polska in Katowice. In April 2004,
BGH acquired the just seven years old rolling mill Huda Baildon in Katowice.
This place looks back on 180 years of tradition in producing and processing steel. The 13 hectare
area covers a billet stock with two billet grinding machines. Modern and new halls accommodate the
rolling mill consisting of a high reversing mill, a 5-standed flat rolling mill and a 16-standed
continuous rolling mill; as well as heat treatment and finishing facilities. On these rolling lines, flat
and square bars can be produced in sections of 15 square up to 250x70 mm.
The main advantage is the grooveless rolling technology. This enables BGH Polska to smoothly roll
intermediate sizes in small lots. Furthermore, we are able to produce products with sharp corners by
using the grooveless rolling technology. This accommodates the cutting industry with its tight
tolerances. The heat treatment facility is equipped with water and polymer tanks which enable us to
supply hardened and tempered products as well. Besides the rolling mill, BGH Polska has 3
warehouses to trade products of its German sister companies:These are in Katowice itself, Lublin
and Elblag.
Among the most important flat products of BGH Polska are turbine blade steel, tool steel, prematerial for die-forging in various grades, ball bearing steel for linear guiding plus stainless, acid and
heat resistant steel. Based on our extensive billet stock, we are able to deliver within short periods of
time. With BGH Freital being the number one pre-material supplier, the first-hand know-how serves
the Polish mill. By now, BGH Polska employs approximately 200 people.
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BGH Feindraht GmbH
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On an area of 2,500m², 36 employees produce wet-drawn fine wire. The thickest wires
have a run-in diameter of 2.6 millimetres, the thinnest finish wire is 0.08 millimetres.
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With BGH Lugau supplying 90% of the pre-material, the whole production process –from
melting to drawing- is in one hand and thus guarantees a high quality. Our high-power
network opens doors for customer related developments: This is why BGH's fine wire is used
in many different applications.
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Initially, BGH Feindraht GmbH produced in particular weaving and knitting wire for industrial
filters and compensators, used in automotive and engineering industries. By now, ChromeNickel and Chrome-Aluminium alloys became an important factor for new applications areas,
such as electronics and telecommunication as well as spring steels.
4. Technologies
Because of our versatile equipped prodution sites Freital, Katowice, Lugau and Siegen, the BGH
group created almost ideal prerequisites to react flexible and quick to customer requests. At BGH
the whole manufacturing process for the production of high quality specialty steels is in one hand.
Melting
Our high-performance steel mills are based on demand- and applicationoriented concepts.
High-performance are furnaces produce liquid steel in melts of 35 to 42 tons from scrap, added
alloys and further substances. Analysis and temperature for further processing are accurately
adjusted in downstream ladle furnaces. The AOD converter or VOD facility optimize the carbon
content of steel. Vacuum treatment is used to remove soluted gases, e. g. hydrogen.
These facilities do not only guarantee an excellent quality with respect to purity and chemical
accuracy. They also enable us to realize special material developments cost-efficiently. These
technologies allow BGH to consider customer requirements as of melting. Special analyses
required by customers are more than usual to us. Material requiring an even better level of purity
is molten in our 7.5t Vacuum Induction Furnace (VIM) at BGH Lippendorf.
We have the possibility to produce ultra-pure special alloys by vacuum melting and casting of
first-class scrap and alloying elements. More and more, the medical, aerospace, chemical,
electronic and oil and gas extraction industries, require steels, nickel and specialty alloys which
need to be vacuum melted and / or re-melted in order to meet the end product’s high
requirements.
Upon request, we would be glad to assist you in finding the right analysis and degree of purity that
complies with your requirements.
Casting
The casting process is aimed at shaping liquid steel which is then
suitable for further forming. Beyond that, the properties of steel are
significantly influenced by the casting technology.
Solidification structure, homogeneity and purity are controlled.
The rising ingot casting technology enables BGH to produce ingots suitable for rolling and forging.
BGH is capable of producing ingots with individual weights ranging from 1 to 42 tons.
Horizontal continuous casting is used to produce rolled or forged bars. In doing so, continuous cast
billets with round sections of 120 to 325 mm are produced.
The advantage of horizontal continuous casting is that the common bending of the strand (as done
on traditional bow-type continuous casting) is inapplicable. By that, material which is sensitive to
cracks can be continuous cast. Furthermore, continuous casting allows melting of several heats in
sequences.
Remelting
A further method of improving the degree of purity is to remelt steel electrodes within ESR
and PESR plants.
Similar to electrode welding, a steel electrode with plate-sized section is melted on its top by the
generation of an electric arc. In drops, the liquid steel passes a special slag where all impurities
settle in. Underneath the slag, an ultrapure ingot arises which may then be rolled or forged.
PESR is a remelting process under controlled gaseous atmosphere. This can either be a protective
gas atmosphere or a reaction gas atmosphere like nitrogen, which is solubilized in steel during
remelting.
Therefore, the PESR process offers an increase in the degree of purity and systematic control of the
chemical analysis and therewith an improvement in mechanical properties.
Forging
BGH Edelstahl looks back on a 500 year tradition when it comes to forging steel bars. Five hydraulic
forging presses and one steam hammer offer BGH a wide selection of forming equipment. All of
them are characterized by their high flexibility in profiling. Besides bar geometries with round,
square, rectangular or hexagon sections, we are able to produce open-die forgings by forging-on
steps and conicities. In addition to that our production programme covers discs, forged pipes and
bushings. Forging allows an excellent material compressibility which has a positive impact on the
microstructure. A variety of sizes and geometries can be produced with manageable tools and thus
allow a production in small lot sizes and individual pieces.
Apart from the forging presses, BGH has three forging machines for different size ranges. The bar is
symmetrical shaped by four forging saddles at the same time. The BGH logo symbolizes the
arrangement of these four forging tools. With our forging machines we are able to produce bars in
various sizes in a fast and cost-efficient manner.
Numerous furnaces and cooling tanks in our forging mills allow systematic heating of prematerial.
Machining
Based on our flexible machineries, we are able to handle a wide range of sizes – including
forgings with extreme dimensions.
Even when it comes to large open-die forgings, including those with a hollow center, we have the
capability to machine out a variety of different contours according to customers' drawings, such as
sieve and spherical shaped parts or pipes.
Drilling
Our deep hole drilling machines enable us to carry out drillings of 20 - 510 mm dia with lengths of up
to 7,200 mm in one run. With our tooling available, we are able to react quickly to customer
requirements involving complex contours, such as inclines and radii in bottom hole bores and bore
transitions.
Turning
We have the capacity to machine work pieces of up to 18,000 mm length (e.g. towing bars, tie rods,
mandrel bars and propeller shafts). In one run, our inclined turning machines are able to machine
complex components, which can include slots, grooves, bevels, taps etc. By that, we achieve shorter
running times and, therefore, a better delivery performance.
Milling
Work pieces with a size of 4,000 - 9,000 mm and a weight of 25 t per piece are manufactured with
our CNC-navigated drilling and milling machines. The navigated machines with up to 6 axles can
produce the most difficult shapes according to customer requirements.
Honing
Our honing machine covers drills of 50 - 510 mm dia. Honing is used to machine drills with a slight
surface roughness and those which do not allow dimensional deviations (e. g. cylinders).
We would be pleased to receive any inquiries you may have regarding the above-mentioned
products.
Rolling
As a manufacturer of long products, BGH operates multiple rolling mills. With our cogging mill cast
and remelted ingots are rolled to square or flat billets. Material with hard workability can be formed
by multiple-heat-rolling. This can be done by backing the pre- rolled slab into the rolling mill
furnaces. Furthermore, facilities for cooling, annealing and grinding are available. The billets of our
cogging mill are rolled to round bars with our downstream blooming mill. In this way, sizes ranging
from 70 to 125 mm dia are produced.
Sizes from 70 to 5,0 mm dia are produced with a combined bar- wire rolling mill.This train can
process continuous cast material as well as material pre-rolled at the blooming mill. The bar-wire
rolling train has different extra equipment to master high flexibility in grades and lot sizes.
Interconnected induction heating facilities enable adjustment of the relevant forming temperature for
every steel grade. A planetary cross rolling mill and four H-V regular rolling stands form the blooming
train. This is followed by another induction heating facility, a 16-standed continuous rolling train and
a 4-standed Kocks block. Latter enables the production of very accurate round sections with its
three-disc-technology which are then forwarded as bars in sizes of 13 to 70 mm dia to the cooling
bank or Garrett-Coiler to produce wire between 12 and 15 mm. Wire sections of 5-12.7 mm are
produced by re-directing the rolling strand behind the Kocks block to the 8-standed wire rod mill.
Furthermore, the bar-wire rolling mill is equipped with various cooling facilities to allow thermomechanical rolling and avoid sintering of certain steel grades due to high rolling velocities.
BGH Polska disposes of a roughing stand, a 16-standed continuous rolling mill and a 5-standed flat
rolling mill and is specialized in the production of flat and square bars. Square sections of 15-42 mm
and flat sections up to 75x5 mm are rolled with the continuous rolling mill. Sections of up to 70 mm
thickness and 250 mm width are rolled with the flat rolling mill. As both trains allow rolling without
calibration, intermediate sizes can be produced even in small lot sizes. Another advantage is that the
material is rolled with sharp corners which mostly accommodates further processing. Natural rolling
corners can as well be produced.BGH Polska is equipped with induction heating and several cooling
facilities to adjust the microstructure.
Heat treatment
One of the strengths of BGH is heat treating steel and special alloys. To heat treat steel bars and
forgings, diverse furnaces with quenching and hardening tanks with water, oil or polymer are
available. Precise quality planning ensures that the required mechanical properties are achieved and
determine the heat treatment parameters necessary to obtain the required microstructure.
BGH’s tempering facilities run the complete heat treatment process computer-controlled. By that,
pre-heating, austenitization, hardening in different mediums and tempering gain a high degree of
reproducibility. Extensive experience combined with numerous technical possibilities of heat
treatment enables BGH to satisfy extravagant requirements.
Thus, after drawing our wire will be annealed in protective atmosphere furnaces.
For intermediate annealing of bigger sizes, our drawing mill Lugau is equipped with pot and hood
type furnaces which may as well be put under protective atmosphere.
A special procedure in heat treatment is the inductive annealing of cold rolls. BGH Lugau has
two different-sized facilities in which cold rolls can be hardened and tempered hanging.
Inductors adapted to the rolls' diameters are responsible for the heating of the rolls' surface. The
rolls are quenched with splashing collars spraying water on the heated surface. Afterwards the cold
roll is placed
hanging into a pot furnace for stress relieving or tempering.
Drawing
Drawing is a pressure forming process, even if the name indicates something else. At this, wire or
bar is sharpened and pulled through a draw plate. The cone-shaped nozzle leads to a stretching of
the material. At the same time, tolerance and wire / bar surface are influenced by drawing. Decisive
for drawing are the steel grade’s forming ability and the lubrication of the drawing clearance. The
material can either be drawn by single or multiple drawing processes. In case of a multiple drawing
process, the wire passes several drawing levels consecutively. Upon cold forming, most steel grades
suffer work hardening so that an intermediate annealing is required to allow further size reductions.
This is done in our inert gas furnaces. Hot drawing is a special drawing process and used for extra
hard steel grades such as high-speed steel. In this case, the wire is heated inductively just in front of
the draw plate. BGH is able to produce wires up to a size of 0.08 mm. The material is packed as per
customer request in barrels, uncoiling devices, spools or bundled coils.
Finishing
Finishing includes those production steps that take place after rolling and heat treatment and put the
material in a ready-to-dispatch state.
Normally, the first step involves the straightening of the material. This takes place on a cluster
straightening machine, two-roll straightening machine or straightening press. Afterwards, if required,
the material will be peeled or turned to obtain a bright surface and close tolerances. BGH has
numerous peeling and turning machines covering the total bar size range. Furthermore, bar ends
can be chamfered automatically. Automatic inspection machines examine the bars for surface
cracks and core defects by Eddy Current and ultrasonic testing. Dye penetrant inspection is used to
ensure forgings are free from cracks. At the end the material is packed and marked as per customer
requirement.
5. Quality
BGH disposes of most modern machines and facilities as well as an extensive know-how. However,
the necessary company’s success can only be guaranteed by clear focussing on customer and
market as well as considering all production factors. Part of that are a permanently high quality level
of production and administration processes as well as motivated and content employees.
To achieve this goal, the management of BGH introduced a quality management system (QMS)
based on DIN EN ISO 9001:2000 which was put into force on July 1, 2003 based on a resolution of
May 27, 2003. In spring 2009 the quality management was successfully recertified according to DIN
EN ISO 9001:2008.
BGH is obliged to meet and sustain the QMS’s requirements plus keep developing them. BGH’s
management is convinced that this QMS is a major tool to improve internal processes continuously
and gather advantages for both the customer and the company itself.
Quality Policy
Quality is an important element to motivate executives and employees in promoting the long-term
positive development of BGH. In co-ordination with the executives, the management determined
company guidelines, which represent the general stipulations of our quality policy. In addition to that,
major quality objectives are agreed annually.
Our quality policy is both instrument and purpose to meet our company goals. It is aimed to the
concrete needs of a medium sized company that has focussed on producing and distributing high
quality steel products. Our quality policy outlines the frame and direction of our activity. We follow
four principal directions fixed in our company guidelines and aim to serve our customers, company,
employees and the regional development of our companies. We are convinced that this unity
guarantees long term economical success of the BGH group.
The quality policy is concretized by our will to:
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supply high quality products into defined markets;
improve the quality level of our employees continuously and suitably;
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guarantee on time delivery of our products;
practice an ongoing improvement process in all areas;
keep the production costs low by high process capability;
enable competitive prices with low costs;
achieve a better price/performance ratio than our competition;
offer the best possible customer service including after-sales service;
realize profit that ensures the long term positive development of the BGH group;
deal with resources in a sustainable and economic manner.
Management of BGH Edelstahlwerke GmbH
Quality assurance
Most modern production facilities at all BGH locations enable us to meet the high quality standards
requested by our customers. This is guaranteed by exact and specification adjusted standards and
working plans as well as quality controls of all order relevant characteristics. These controls take
place by inspections thru the workers themselves or special laboratories.
Ongoing production surveillance and consequent applied quality assurance are prerequisites to cope
with the production processes in their depth and variety.
For that BGH established its own ERP-System that accompanies and supports our extensive and
versatile production at all our sites, ranging from the offer to the delivery of the material.
All production steps are determined in detail and monitored:
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accurate production, control and inspection stipulations prior to the begin of production;
verification of the input material;
controlled metallurgical sequences during melting, re-melting and casting;
guided forming processes during forging, rolling and drawing;
monitored heat treatments of various types;
detailed and challenging mechanical machining and finishing processes;
determination of all purchase order relevant mechanical and technological properties;
verification of customer-related requirements by regular non-destructive inspection;
statistical analysis of properties to rectify deviations.
Our central operated quality management system is completely in line with DIN EN ISO
9001. This system has been certified by Lloyds’s Register Quality Assurance Ltd. at all BGH
sites.
In addition to that, BGH is approved by all major national and international classification societies, for
instance BV, GL, DNV, TÜV and LR. Numerous company related approvals of our national and
international customers prove their trust in our products. Of course, requirements of specifications
such as ASME Code or AD and TRD data sheets are met.