Wieland-K81®
Rolled Products
CuSn0,15
C14415
Material Designation
Chemical Composition (Reference)
Typical Applications
EN
CuSn0.15
Sn
0.1 %
UNS*
C14415
Cu
balance
· Components for the electrical industry
· Connector pins
· Fuse boxes in automobiles
· Leadframes for semiconductors
* Unified Numbering System (USA)
Physical Properties*
Electrical
Conductivity
MS/m
%IACS
51
88
Thermal Conductivity W/(m·K)
350
Coefficient
of Electrical
Resistance**
10-3/K
3.2
Coefficient of
Thermal Expansion** 10-6/K
18.0
Density
8.93
g/cm3
Modulus of Elasticity GPa
Specific Heat
J/(g·K)
Poisson’s Ratio
130
0.385
0.34
* Reference values at room temperature
** Between 0 and 300 °C
Fabrication Properties
Corrosion Resistance
Capacity for Being
Cold Worked
excellent
Machinability
fair
Capacity for Being
Electroplated
excellent
Capacity for Being
Hot-Dip Tinned
excellent
Soft Soldering
excellent
Wieland-K81® has good corrosion
resistance in natural atmosphere (also
sea air) and industrial atmosphere.
In different waters and neutral saline
solutions, it exhibits better resistance
to corrosion through
abrasion and pitting than SF-Cu.
Wieland-K81® is insensitive to stress
corrosion.
Resistance
Welding
fair
Gas Shielded
Arc Welding
excellent
Laser Welding
good
Mechanical Properties
K81
R250
R300
56
R360
R420
Tensile Strength Rm
MPa
250–320
300–370
54
360–430
420–490
Yield Strength Rp0.2
MPa
≥ 200
≥ 250
52
≥ 300
≥ 350
Elongation A50mm
%
≥9
≥ 450
≥3
≥2
Temper
H060
El. Conductivity (MS/m)
Temper
Hardness HV
60–90
85–110
Intermediate tempers are feasible. Higher elongation values can be obtained
48by additional heat treatments.
H085
44
El. Conductivity (MS/m)
56
54
52
50
48
46
44
R250
H060
R300
H085
Temper
0°
K81
6
R250
H060
H105
R300
105–130
H085
H120
Temper
R360
120–140
H105
R420
H120
Bendability (Strip Thickness t ≤K81
0.5 mm)
K81
R360
H105
R420
H120
Rel. Bending Radius r/t 90°
Electrical Conductivity
46
6
5
4
3
bending edge –I rolling direction
bending edge II rolling direction
2
1
0
R250
H060
R300
H085
Temper
R360
H105
R420
H120
Wieland-K81®
CuSn0,15
C14415
Resistance
K81 to Softening
130
Temper R300
400 °C
425 °C
500 °C
120
110
100
110
90
80
70
60
50
40
0
5
10
15
20
Time (min)
25
Temper R360
400 °C
425 °C
500 °C
120
Vickers Hardness HV
Vickers Hardness HV
K81
130
30
100
Vickers hardness
after heat treatment
(typical values)
90
80
70
60
50
40
0
5
10
15
20
Time (min)
25
30
K81 (wh)
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 rolled to temper 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
R300, R360, R420
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
Wieland-Werke AG
Dimensions Available
· Hot-dip tinned strip
· Contour-milled strip
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