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Beryllium Copper Alloys
Security Reliability Performance
Beryllium Copper Introduction
Offers unique combinations of mechanical and electrical properties
The Berylco Beryllium Copper alloys are the
most versatile of all copper alloys.
They combine a wide range of properties that
make our alloys the ideal materials to meet the
exacting requirements of many products
demanding high specifications that are used in
the most diverse markets.
ADVANTAGES
High strength
High fatigue life
Good conductivity
Good formability
Corrosion resistance
Stress relaxation
Wear & abrasion resistance
Wide temperature range
Non-magnetic
Non-sparking
All manufacturing technologies such as casting,
forging, extrusion, cold drawing, cold rolling,
stamping, machining, soldering, plating, and
many others, can be used to produce any
beryllium copper parts.
Meet tomorrow’s technological challenges
The Berylco alloys offer a wide combination of
mechanical and electrical properties, combining
with excellent formability which is unique for
copper alloys.
Demands for cost, quality, miniaturisation,
reliability, safety, environmental protection and
high-end general performance require suitable
high-performance alloys such as beryllium
copper.
The mechanical strength achieved after a simple
heat treatment, at low temperature, ranks
highest amongst all the copper-based alloys,
and combined with a high electrical conductivity
outperforms any bronze alloys.
The available data is to be referred to by the
user in order to select the correct alloy and
temper and the alloy which will provide optimum
properties and yet be compatible with the
forming of the part.
Our alloys exhibit a wide range of desired
properties such as high fatigue strength,
excellent corrosion, wear and abrasion
resistance.
For a given problem we can investigate the
possibility of improving the formability while
retaining the desired mechanical properties. For
these special investigations NGK Berylco offers
the services of its engineers and technical
advisors.
They are also non-magnetic and non-sparking.
Automotive
Aerospace
Electrical & Electronic
Telecommunication
Home appliances
Nuclear energy
Offshore
Biomedical & Medical
Photovoltaic
Watch making
Defence & Military
Railway …
Electrical conductivity (%IACS)
MARKETS
High Bending Formability
Formability (R/t ; 90° Transversal bending)
High Strength & Electrical Conductivity
PRODUCT RANGE
The Berylco alloys product range including
strips, rods, wires, foundry alloys (ingots,
master alloys to 4%), Chill-Vents, forged rods,
plates, profiles and safety tools.
INDUSTRIAL HYGIENE
When supplied in solid form, beryllium copper
alloys are non-hazardous, because Beryllium
has been completely dissolved into copper.
General handling, stamping, forming, most
machining
operations,
pickling,
surface
treatment, plating and heat treatment are nonhazardous and do not require any special
precautions.
discharge machining, melting or welding, then an
inhalation hazard could arise.
If they are subsequently processed in any way
which might give rise to airborne dust or fumes,
for instance by dry grinding, abrading, electro-
For more information concerning the non
hazardous use or to request our product safety
information sheets (SIS), please contact us.
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Any such process requires suitable air extraction
3
and filtration to maintain Be level of 2 µg/m of air
per working day, value set up by the Ministry of
Labour as the average Permissible Exposure
Limit (PEL) has not to be exceeded.
Beryllium Copper alloys
High Strength alloy
Berylco alloys Properties
Designation
Chemical composition (%)
Product form
Characteristics
BERYLCO 25
Be :
Co :
Co + Ni + Fe :
Cu + additions :
1,8-2,0 %
0,3 % max.
0,6 % max.
99,5 % min.
Strip
Rod
Wire
B25 alloys offer a wide combination of
properties ranging from good electrical
conductivity, good formability, and very
high mechanical and electrical properties
after heat treatment.
Be :
Co :
Co + Ni + Fe :
Pb :
Cu + additions :
1,8-2,0 %
0,3 % max.
0,6 % max.
0,2 % min.
99,5 % min.
Rod
Wire
Free machining very high strength alloy. Its
small addition of lead gives a very good
machinability index. Its properties are
identical to Berylco 25.
Be :
Ni :
Cu + additions :
0,2-0,6 %
1,8-2,2 %
99,5 % min.
Strip
Rod
Wire
B14 alloys combine good mechanical
properties and high electrical conductivity.
B14S mill hardened strip product offers an
excellent formability superior to any other
copper alloys.
Be :
Ni :
Cu + additions :
0,2-0,6 %
1,4-2,2 %
99,5 % min.
Strip
B8 alloys combine very high electrical
conductivity (>60 %IACS) and good
mechanical properties. It is recommended
for products exposed to high temperature.
Be :
Ni + Co :
Al :
Cu+Be+Ni+Co+Al :
0.2-0.4 %
1.8-2.5 %
0.6 % max.
99.5 % min.
Strip
B7 alloys offer an excellent combination of
mechanical, formability and electrical
properties, and are recommended for large
production batch applications.
ISO
EN
UNS
CuBe2
CW 101 C
C17200
BERYLCO 33/25
ISO
EN
UNS
CuBe2Pb
CW 102 C
C17300
High Conductivity alloys
BERYLCO 14
ISO
EN
UNS
CuNi2Be
CW 110 C
C17510
BERYLCO 8
ISO
EN
UNS
CuNi2Be
CW 110 C
C17510
BERYLCO 7
ISO
UNS
CuNi2Be
C17530
Physical properties after precipitation hardening
Melting point
(°C)
3
Berylco 25
Berylco 33/25
Berylco 14
Berylco 8
Berylco 7
865-980
865-980
1030-1070
1005-1070
1050-1085
Density
(g/cm )
at 20°C
8,26
8,26
8,75
8,75
8,71
Specific heat
(Cal/(g.°C)) at 20°C
0,1
0,1
0,1
0,1
0,1
Coefficient of linear expansion
-6
at 20° to 200°C
17,3
17,3
18
17,6
17,6
Electrical resistivity ρ (maxi)
-8
(10 Ω.m)
at 20°C
7,9
7,9
3,8
3,1
5,4
Thermal conductivity
(W/m.K)
at 20°C
84-130
84-130
167-260
167-260
148-194
Electrical conductivity
(% IACS)
at 20°C
Modulus of elasticity
(x10 /°C)
25
25
50
63
38
2
130 000
130 000
132 000
132 000
127 000
2
50 000
50 000
52 000
52 000
49 000
0,3
0,3
0,3
0,3
0,3
1.000042
1.000042
1.000031
1.000031
1.000027
≥ 300
≥ 300
≥ 240
≥ 240
≥ 250
(N/mm )
Modulus of rigidity
(N/mm )
Poisson’s ratio
Magnetic permeability
µ (µ=1+4πk)
2
Fatigue resistance
(N/mm )
8
at 10 cycles
Reference Specifications
Authority
Strip
Rod and Wire
EN
1652, 1654
12163, 12164, 12165, 12166, 12167
ASTM
B194, B534
B196, B197, B442, B441
CDA and SAE
C17200, C17000, C17510, C17530
C17200, C17300, C17510
JIS
H3130 C1720 P.R, H3130 C1751 P.R
H3270 C1720 B.W
(1)
AFNOR
(1)
A51.109
A51.114(1), A51.414(1), NFL14.709
DIN(1)
17666(1), 17670(1), 1777(1)
17666(1), 17672(1)
British Standard(1)
BS 2870(1)
BS 28731, BS 2874(1)
Federal USA(2)
QQ-C-533(2)
QQ-C-530(2)
■ Specifications replaced by the EN (1) and ASTM (2) specifications. Withdrawn and superseded specifications are listed for reference only, and are not to be used for purchasing.
■ Please contact NGK Berylco to determine the appropriate replacement specification.
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Berylco Strip
Strip Properties
High Conductivity
High Strength
Alloy
B25
B14
B8
B7
Temper
TS
(N/mm²)
YS 0,2%
(N/mm²)
Elongation
A50 mini
(%)
Age hardenable
A
410 – 540
190 – 380
1/4H
510 – 610
400 – 560
1/2H
590 – 690
510 – 660
H
690 – 830
650 – 800
Age hardened
AT
1130 – 1350 960 – 1210
1/4HT
1210 – 1400 1020 – 1280
1/2HT
1260 – 1450 1090 – 1350
HT
1310 – 1520 1130 – 1420
Mill hardened (standard)
1/4HM
750 – 870
550 – 760
1/2HM
830 – 960
650 – 850
HM
930 – 1080
750 – 980
SHM
1030 – 1150
860 – 1020
XHM
1100 – 1250
930 – 1180
XHMS
1200 – 1320 1030 – 1230
Mill hardened Type B (high formability)
1/2HMB
830 – 930
660 – 860
HMB
930 – 1030
760 – 930
XHMB
1070 – 1210
930 – 1170
Mill hardened Type S (very high formability)
HM-TypeS
960 – 1040
790 – 940
XHM-TypeS
1060 – 1220
930 – 1070
Age hardenable
A
250 – 380
140 – 300
1/2H
410 – 530
340 – 480
H
480 – 600
370 – 560
Age hardened
AT
680 – 870
550 – 690
1/2HT
750 – 900
650 – 850
HT
750 – 950
670 – 900
Mill hardened (high formability)
S780
780 – 930
680 – 850
S880
880 – 1020
780 – 950
Mill hardened (standard)
HT
700 – 870
600 – 780
Mill hardened (standard)
1/2HT
670 – 800
550 – 760
HT
765 – 900
685 – 830
EHT
870 – 1000
750 – 930
Hardness
(HV)
Electrical
Conductivity
(% IACS)
Heat
Treatment
Formability R/t
at 90° bending
Long.
Trans.
35
15
8
2
90 – 150
130 – 190
180 – 220
215 – 270
15 – 19
15 – 19
15 – 19
15 – 19
---------
0,0
0,0
1,0
2,0
0,0
0,0
2,0
5,0
3
3
1
1
350 – 410
360 – 430
370 – 440
380 – 450
21 – 28
21 – 28
21 – 28
21 – 28
3h at 315°C
2h at 315°C
2h at 315°C
2h at 315°C
-----
-----
15
12
9
9
4
3
235 – 280
260 – 310
290 – 350
310 – 360
345 – 395
365 – 420
19 – 28
19 – 28
19 – 28
19 – 28
19 – 28
19 – 28
M
M
M
M
M
M
1,3
1,5
2,3
2,5
3,0
4,0
1,8
2,0
2,5
3,0
4,0
6,0
12
9
6
255 – 310
280 – 340
330 – 390
17 – 26
17 – 26
17 – 26
M
M
M
0,0
1,0
2,0
0,0
1,0
2,0
9
6
285 – 370
315 – 395
17 – 26
17 – 26
M
M
0,5
1,0
0,5
1,0
20
5
2
60 – 130
125 – 160
140 – 185
22 – 25
22 – 25
22 – 25
-------
0,0
1,5
2,0
0,0
2,0
3,0
8
5
5
190 – 250
215 – 265
220 – 270
≥ 45
≥ 45
≥ 45
3h at 480°C
2h at 480°C
2h at 480°C
-1,5
2,0
-2,0
2,0
12
10
220 – 270
250 – 310
≥ 48
≥ 48
M
M
0,3
0,7
0,3
0,7
5
210 – 260
≥ 60
---
1,0
1,0
10
8
4
195 – 250
220 – 275
250 – 310
≥ 38
≥ 33
≥ 30
-------
0,0
0,5
1,0
0,0
1,0
1,5
from 50 to 100
± 0.10
± 0.06
± 0.15
> 100
± 0.20
± 0.20
± 0.20
■ Strip Properties – Values are applicable to thickness 0.1mm and over.
■ M – “Mill Hardened” M indicates that the metal has been submitted to a treatment facility
designed especially to give characteristics falling within a guaranteed range specific properties.
Note
■ Formability – The formability R/t ratio allows a bending radius at 90° without cracking in the
direction of rolling (longitudinal and transverse bending ways), for the various tempers. Typical
R/t values are applicable for strip of 0.25mm thick or less.
R = radius of bending ; t = thickness of the strip.
Strip Dimensional Tolerances
Thickness tolerances (mm)
Thickness
< 0.099
0.10 – 0.149
0.15 – 0.199
0.20 – 0.249
0.25 – 0.299
0.30 – 0.399
0.40 – 0.499
0.50 – 0.599
0.60 – 0.799
0.80 – 0.999
1.00 – 1.199
1.20 – 1.499
1.50 – 2.000
Standard
± 0.004
± 0.005
± 0.006
± 0.007
± 0.008
± 0.009
± 0.010
± 0.013
± 0.015
± 0.030
± 0.035
± 0.045
± 0.050
Width tolerances (mm)
Precision
± 0.003
± 0.004
± 0.004
± 0.005
± 0.006
± 0.007
± 0.008
± 0.009
± 0.010
On demand
On demand
On demand
On demand
■ If supplied A temper, only standard tolerances are possible.
Thickness
≤ 0.80 mm
> 0.80 mm
Width
standard
precision
standard
from 3 to 49.9
± 0.08
± 0.05
± 0.10
Camber tolerances max. / 1m (mm)
Ratio : Width / Thickness (mm)
Straightness tolerances fo (mm)
8 – 15
15.1 – 30
30.1 – 60
60.1 – 120
> 120
8
6
4
3
2
■ If the measurement is made over a length l1 other than 1 m, the value for f1 is
established by the formula: f1 = fo × I1² (l1 is in mm).
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Berylco Rod & Wire
Rod Properties
High Strength
& Conductivity
Alloy
Temper
Diameter
(mm)
Age hardenable
A
All dimensions
H
Ø ≤ 25 mm
H
Ø > 25 mm
Age hardened
AT
All dimensions
HT
Ø ≤ 25 mm
HT
Ø > 25 mm
Age hardened
AT
All dimensions
HT
All dimensions
B25
&
B33/25
B14
TS
(N/mm²)
YS 0,2%
(N/mm²)
Elongation
A50 mini
(%)
Hardness
(HV)
Electrical
Conductivity
(% IACS)
Heat
Treatment
420 – 600
620 – 900
600 – 800
170 – 270
550 – 800
500 – 750
35
3
5
90 – 150
200 – 250
180 – 240
15 – 19
15 – 19
15 – 19
-------
1150 – 1350
1300 – 1500
1200 – 1500
1000 – 1250
1150 – 1400
1050 – 1400
3
1
2
360 – 410
390 – 440
380 – 430
21 – 28
21 – 28
21 – 28
3h at 315°C
2h at 315°C
2h at 315°C
650 – 800
740 – 900
500 – 670
640 – 800
10
8
190 – 250
210 – 270
48 – 60
48 – 60
3h at 480°C
2h at 480°C
Rod Dimensional Tolerances
Dimensional tolerances (Age hardenable)
Berylco 25
Ø (mm)
1,4 – 3.0
3,1 – 6.0
6,1 – 10.0
10,1 – 18.0
18,1 – 25.0
25,1 – 30.0
30,1 – 50.0
50,1 – 60.0
Length / Diameters
Berylco 33/25
± (mm)
Ø (mm)
h9 : +0, -0,025
h9 : +0, -0,030
h9 : +0, -0,036
h10 : +0, -0,070
h10 : +0, -0,084
h11 : +0, -0,130
h11 : +0, -0,160
h11 : +0, -0,190
Berylco 25
± (mm)
0,9 – 2,3
2.4 – 3.0
3.1 – 6.0
6.1 – 10.0
10.1 – 13.0
13.1 – 18.0
18.1 – 25.4
25.5 – 30.0
30.1 – 40.0
h8 : +0, - 0.014
h8 : +0, - 0.014
h8 : +0, - 0.018
h8 : +0, - 0.022
h8 : +0, - 0.027
h9 : +0, - 0.043
h9 : +0, - 0.052
h10 : +0, - 0.084
h10 : +0, - 0.100
Berylco 33/25
Ø (mm)
± (mm)
Ø (mm)
< 25,4
25,5 – 45
45,1 – 50,8
50,9 – 60
3 m ± 100mm
2 m min.
1,5 m min.
1 m min.
≤ 3.0
3,1 – 18
18,1 – 25
25,1 – 40
± (mm)
3 m ± 10mm
3 m ± 50mm
3 m ± 100mm
2 m min.
■ Remarks: For Berylco 33/25 alloys, CuBe2Pb, rods are pointed and
chamfered up to Ø16 mm before shipment.
■ Rods can be delivered centerless ground.
Contact us
■ NGK Berylco can also supply some profile rods (square, rectangular and hexagonal) cold drawn or hot worked, and some non-standard sizes.
Wire Properties
Alloy
Temper
Diameter
(mm)
TS
(N/mm²)
High
Strength
Age hardenable
A
Ø ≥ 0.30
390 – 540
1/2 H
Ø ≥ 0.10
550 – 780
B25
H
Ø ≥ 0.10
750 – 1140
&
Age hardened
B33/25
AT
Ø ≥ 0.30
1130 – 1300
1/2 HT
Ø ≥ 0.10
1200 – 1450
HT
Ø ≥ 0.10
1270 – 1550
■ Elongation and electrical conductivity are for design guidance only.
YS 0,2%
(N/mm²)
Elongation
A50 mini
(%)
Hardness
(HV)
Electrical
Conductivity
(% IACS)
Heat
Treatment
140 – 250
470 – 750
610 – 960
35
10
2
-------
-------
-------
980 – 1200
1100 – 1350
1200 – 1460
3
2
1
-------
> 22
> 22
> 22
3h at 315°C
2h at 315°C
2h at 315°C
Wire Dimensional Tolerances
Diameter (mm)
0.10 – 0.25
0.26 – 0.30
0.31 – 0.50
0.51 – 2.00
2.01 – 3.50
3.51 – 4.50
4.51 – 9.50
Standard Tolerances
± 0.005
± 0.008
± 0.010
± 0.020
± 0.030
± 0.040
± 0.050
Precision Tolerances
On demand
On demand
± 0.005
± 0.010
± 0.015
± 0.020
± 0.030
■ Other wire dimensions available on demand.
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FRANCE
GREAT BRITAIN
GERMANY
NGK BERYLCO France
Quai Emile Paraf, BP17,
44220 Couëron, France
Tel : +33 (0)2 40 38 67 50
Fax: +33 (0)2 40 38 09 95
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Houston Park, Montford Street,
Salford, M50 2RP, U.K.
Tel: +44 (0)161-745-7162
Fax: +44 (0)161-745-7520
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61476 Kronberg Im Taunus, Germany
Tel: +49 (0) 6173 993 400
Fax: +49 (0) 6173 993 401
SPAIN
SWITZERLAND
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Calle la Ginesta, 6, Apt de Correos 47
08 830 Sant Boi de Llobregat, España
Tel: +34 93 640 0573
Fax: +34 93 630 2865
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Rte de Berne 24
CH - 2555 Brügg
Tel: +41 (0) 32 366 75 55
Fax: +41 (0) 32 366 77 34
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Via G. Passeroni, 6
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Tel: +39 02-45506240/1
Fax: +39 02-39304926
Email: tecnicom@mclink.it
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CHINA
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Fax: +81 (0)3-6213-8973
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Shanghai Office,
Dawning Centre Tower A Room 1902,
No.500 Hongbaoshi Road,
Shanghai 201103, China
Tel: +86-021-3209-8870
Fax: +86-021-3209-8871
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Shenzhen Branch
Room.8, Level.15, Tower 2,
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INDIA
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NGK METALS Corporation
917 U.S. Highway 11 South,
Sweetwater, TN 37874, USA
Tel: +1 (800) 523-8268
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Distributed by :
EN 9100
ISO 14001
Edition 06/2014
Copyright © 2014 by NGK Berylco Europe