ZAPP PRECISION STRIP
DATASHEET DURO-BIFLEX ®
BIMETAL-STRIP STEEL
CERTIFIED TO ISO 9001
DURO-BIFLEX ® BIMETAL-STRIP STEEL FOR METAL
CUTTING SAW BLADES.
®
DURO-BIFLEX beam welded bimetal strip steel is the
ideal raw material for bimetal saws with the highest
quality and processing economy.
SURFACE FINISH
_ Standard: cold rolled grey-blue,
_ Ground only for repair
EDGE FINISH
Backing-Strip-Edge: square filed and round
HSS-Edge: square
SKETCH OF A BIMETAL BAND SAW
TOLERANCES OF FINISH
High Speed Steel
Straightness: max. 1.50 mm/m
Dog Leg: max. 0.25 mm/500mm
Dish: max. 0.2% of strip width
Closer tolerances on request
Welding Seam
Backing Strip
WELDING SEAM FINISHES
Width of upper welding seam: max. 50 % of strip
thickness
Width of lower welding seam: min. 0.16 mm
APPLICATIONS
MATERIAL RANGE/APPROXIMATE CHEMICAL
_ Band saws
_ Hole saws etc.
ANALYSIS(%)
BACKING MATERIAL GRADE
FINISH
_ Cold rolled,
_ Beam welded,
_ Unhardened
Grade
C
Mn
Cr
Mo
Ni
V
Westig®
46CrMoV4
(1.7701EA)
0.45
1.00
1.10
1.0
0.50
0.30
DIMENSIONS
Westig®
0.30
2390 Special
(9.9390EA)
1.00
3.80
1.1
0.70
0.35
Westig®2393 0.36
(9.9393EA)
0.85
3.25
0.9
0.20
0.20
Width: 19.05 – 80.20 mm
Thickness: 0.889 – 1.60 mm
Width of HSS-edge: 1.00 – 2.00 mm
TOLERANCES
Width: ≤ 32 mm ± 0.076 mm
> 32 mm ± 0.100 mm
Thickness: ± 0.025 mm
HIGH SPEED STEEL GRADE
MECHANICAL PROPERTIES
Backing strip: max. 260 HV 1
Welding seam: max. 420 HV 1
HSS: max. 320 HV 1
PAGE 1/2
Standard
Grade
Similar
to MaterialNo.
C
M 42
1.3247
M 51
1.3207
Cr
Mo
V
W
Co
1.10 4.00
9.50
1.10
1.50
8.00
1.28 4.15
3.75
3.25
10.3
10.5
ZAPP PRECISION S TRIP | DA TASHEE T DURO-BIFLEX ®
MARKING OF DEFECTS
h
s
t
b
d
a
A b m e ssu n g e n
Width
of strip
B a n d b r e it e
A u sk e r b u n g s- A u sk e r b u n g s- Lo ch d u r ch -
s
b
b
A b st a n d d e r Lo ch u n g v o n
Width
of notchm e sse r
t ie f e
b r e it e
h
s
Depth of notch
S t u m p f sch w e iß - T r ä g e r b a n d -
d
a
na ht
(+/ - 0 ,5 0 m m ) (+/ - 0 ,2 0 m m ) (+/ - 0 ,1 0 m m )
h
(+/ - 5 ,0 m m )
k a nt e
t
(+/ - 0 ,2 5 m m )
(je w e ils b is M it t e Lo ch u n g )
(±0.50 mm)
(± 0.20 mm)
Diameter of hole
Gap from hole to
Butt weld
(± 5.0 mm)
d
(± 0.10 mm)
a
6 ,3 5
5 ,0 0
9 ,5 2
5 ,0 0
6.35
9.52
12.7
1 2 ,7
All figures in mm
>= 5 4 ,5 0
3 ,0 0
k e in e Lo ch u n g
4 ,0 0
3 ,0 0
5.00
5.006 ,0 0
5 ,0 0
6 ,0 0
5.00
5 ,0 0
2 0 ,0 0
4.00
6.00
2 0 ,0 0
1 0 ,0 0
1 2 ,0 0
2 0 ,0 0
12.00
1 0 ,0 0
6 ,0 0
2 0 ,0 0
1 0 ,0 0
no hole
no hole
no hole
3.00
20.00
6.0 – 7.0
6.00
20.00
10.00
6.00
20.00
10.00
6.00
20.00
10.00
FORM OF DELIVERY
COILS
APPROXIMATE HEAT TREATMENT
Quality
6 ,0 - 7 ,0
6 ,0 0
A lle A n g a b e n in m m
HEAT TREATMENT
no hole
7.50
10.007 ,5 0
1 0 ,0 0
3.00
t
mm)
(measured from middle of
hole)
2.50
5.00
> 34.50 – 41.50
3 4 ,5 0 - 4 1 ,5 0
≥>54.50
k e in e Lo ch u n g
5.00
5 ,0 0
19.05
1 9 ,0 5–-34.50
3 4 ,5 0
2 ,5 0
Backing
edge
(± 0.25)
Hardening
temperature
C°
Tempering
temperature
C°
Time
2h
Hardness
min.
M 42
1180
560
3x
910 HV
M 51
1210
560
3x
920 HV
Coil width
(mm)
Coil length
(mm)
Length
tolerance
(m)
Inside
diameter
(mm)
Max.
number of
defects
19.05 – 34.5
303
± 0.5
400
3
155
± 0.5
400
2
> 34.5
Minimum gap from defects to beginning or end of coil is 15 m.
COLOUR CODING SYSTEM
HSS-width
M 42
M 51
1.016
blue + black
copper + black
1.57
blue + white
copper + white
2.00
blue + green
copper + green
Further information regarding our products and locations are
available in our image brochure and under www.zapp.com
ZAPP PRECISION STRIP
Stahlwerk Ergste Westig GmbH
Hochstraße 32
59425 Unna
P.O. Box 21 29
59411 Unna
Phone +49 2304 79-187
Fax +49 2304 79-6187
precisionstrip@zapp.com
The illustrations, drawings, dimensional and weight data and other
information included in these data sheets are intended only for the
purposes of describing our products and represent non-binding
average values. They do not constitute quality data, nor can they be
used as the basis for any guarantee of quality or durability. The
applications presented serve only as illustrations and can be
construed neither as quality data nor as a guarantee in relation to
the suitability of the material. This cannot substitute for
comprehensive consultation on the selection of our products and on
their use in a specific application. The brochure is not subject to
change control.
Last revision: July 2009
www.zapp.com
PAGE 2/2
ZAPP PRECISION S TRIP | DA TASHEE T DURO-BIFLEX ®