Wieland-K75® Rolled Products - Wieland

Wieland-K75®
Rolled Products
CuCrSiTi
C18070
Material Designation
Chemical Composition (Reference)
Typical Applications
EN
no EN standard
Cr
0.3 %
UNS*
C18070
Ti
0.1 %
Si
0.02 %
Cu
balance
· Components for the electrical industry
· Stamped parts
·Connectors
· Relay springs
· Semiconductor components
* Unified Numbering System (USA)
Physical Properties*
Electrical
Conductivity
MS/m
%IACS
45
78
Thermal Conductivity W/(m·K)
310
Coefficient
of Electrical
Resistance**
10-3/K
3.0
Coefficient of
Thermal Expansion** 10-6/K
18.0
Density
8.88
g/cm3
Modulus of Elasticity GPa
Specific Heat
J/(g·K)
Poisson’s Ratio
138
0.385
0.34
* Reference values at room temperature
** Between 0 and 300 °C
Fabrication Properties
Corrosion Resistance
Capacity for Being
Cold Worked
good
Machinability
less suitable
Capacity for Being
Electroplated
good
Wieland-K75® is resistant to pure
water vapour and non oxidizing acids
and alkalis as well as neutral saline
solutions. The material is insensitive
to stress corrosion cracking.
Capacity for Being
Hot-Dip Tinned
good
Soft Soldering
good
Resistance
Welding
fair
Gas Shielded
Arc Welding
excellent
Laser Welding
fair
Mechanical Properties
K75
R400
R460
54
R530
R550
Tensile Strength Rm
MPa
400–480
460–540
52
530–610
550–630
Yield Strength Rp0.2
MPa
≥ 300
≥ 370
50
≥ 460
≥ 520
Elongation A50mm
%
≥8
≥ 548
≥2
≥7
(140–170)
46
(150–190)
(150–190)
Hardness HV (for information only)
(120–150)
El. conductivity (MS/m)
Temper
44
42
R400
R460
R530
R550
Temper
54
6
52
5
50
48
46
44
42
R400
R460
R530
Temper
K75
6
90°
Bendability (Strip Thickness t ≤ 0.5 K75
mm)
K75
R550
Rel. bending radius r/t
El. conductivity (MS/m)
Electrical Conductivity
4
3
180°
bending edge –I rolling direction
bending edge II rolling direction
2
1
0
R400
R460
R530
Temper
R550
Wieland-K75®
CuCrSiTi
C18070
K75
160
180
150
170
140
160
130
150
Vickers Hardness HV
Vickers Hardness HV
Resistance
K75 to Softening
120
110
100
Temper R460
400 °C
450 °C
500 °C
90
80
70
0
5
10
15
20
Time (min)
25
30
Vickers hardness
after heat treatment
(typical values)
140
130
120
Temper R530
400 °C
450 °C
500 °C
110
100
90
0
5
10
15
20
Time (min)
25
30
K75
Thermal Stress Relaxation
Stress remaining after thermal relaxation as a function of Larson-Miller
parameter (F. R. Larson, J. Miller, Trans
ASME74 (1952) 765–775) given by:
P = (20 + log(t))*(T + 273)*0.001.
Time t in hours, temperature T in °C.
Example: P = 9 is equivalent to
1.000 h/118 °C.
Measured on stress relief annealed
specimens parallel to rolling direction.
Total stress relaxation depends on
the applied stress level. Furthermore,
it is increased to some extent by cold
deformation.
100
Residual Stress (%)
90
80
70
60
50
40
Temper
R400, R460, R530, R550
7.0
8.0
9.0
10.0
Larson-Miller parameter P
11.0
Fatigue Strength
The fatigue strength is defined as the maximum bending stress amplitude which a material withstands for 107 load cycles
under symmetrical alternate load without breaking. It is dependent on the temper tested and is about 1/3 of the tensile
strength Rm.
· Standard coils with outside
diameters up to 1400 mm
· Traverse-wound coils with drum weights up to 1.5 t
· Multicoil up to 5 t
Wieland-Werke AG
Dimensions Available
· Hot-dip tinned strip
· Contour-milled strip
·Sheet
· Strip and sheet with protective
coating
www.wieland.com
Graf-Arco-Str. 36, 89079 Ulm, Germany, Phone +49 731 944 2030, Fax +49 731 944 4257, [email protected]
This printed matter is not subject to revision. No claims can be derived from it unless there is evidence of intent or gross negligence.
The product characteristics are not guaranteed and do not replace our experts’ advice.
· Strip thickness from 0.10 mm,
thinner gauges on request
· Strip width from 3 mm,
however min. 10 x strip thickness
10/14 Bm (R+G)
Types and Formats Available