1. No category

Wieland-S23
Rolled Products
CuZn23Al3Co
C68800
Material Designation
Chemical Composition (Reference)
Typical Applications
EN
CuZn23Al3Co
Cu
74 %
UNS*
C68800
Al
3.5 %
Co
0.4 %
Zn
balance
· Components for the electrical industry
· Contact springs
· Insulation displacement connectors
* Unified Numbering System (USA)
Physical Properties*
Electrical
Conductivity
Fabrication Properties
Corrosion Resistance
Good general corrosion resistance,
also in seawater. Much lower
sensitivity to stress corrosion
cracking than CuZn37. Due to the
aluminium content, S23 has a much
better tarnish resistance than e. g.
brass or bronze.
MS/m
%IACS
10
17
Capacity for Being
Cold Worked
excellent
Thermal Conductivity W/(m·K)
78
Machinability
fair
Capacity for Being
Electroplated
excellent
Capacity for Being
Hot-Dip Tinned
less suitable
Soft Soldering
less suitable
Resistance
Welding
good
Gas Shielded
Arc Welding
fair
Laser Welding
less suitable
Coefficient
of Electrical
Resistance**
10-3/K
1.2
Coefficient of
Thermal Expansion** 10-6/K
18.2
Density
8.23
g/cm3
Modulus of Elasticity GPa
Specific Heat
J/(g·K)
Poisson’s Ratio
116
0.375
0.34
* Reference values at room temperature
** Between 0 and 300 °C
Mechanical Properties
S23
R540
R600 13
R660
R740
R820
Tensile Strength Rm
MPa
540–600
600–700
12
660–750
740–830
≥ 820
Yield Strength Rp0.2
MPa
≤ 430
≥ 510 11
≥ 580
≥ 660
≥ 780
Elongation A50mm
%
≥ 30
≥ 13
≥ 10
≥3
≥2
Temper
H190
Hardness HV
190–220
Electrical Conductivity
El. Conductivity (MS/m)
Temper
11
10
9
8
R600
R660
R740
H190
H210
Temper
S23
0°
Rel. Bending Radius r/t 90°
El. Conductivity (MS/m)
12
R540
14
9
8 H210
7 210–240
R540
H235
R600
≥ 235
R660
R740
H190
H210
Temper
R820
H235
Bendability (Strip Thickness t ≤S23
0.5 mm)
S23
13
7
10
R820
H235
14
12
10
bending edge –I rolling direction
8
bending edge II rolling direction
6
4
2
0
R540
R600
R660
R740
H190
H210
Temper
R820
H235
Wieland-S23
CuZn23Al3Co
C68800
Resistance
S23 to Softening
220
Temper R660
400 °C
500 °C
600 °C
210
200
Vickers Hardness HV
190
Vickers Hardness HV
S23
180
170
160
150
140
130
0
10
20
30
40
Time (min)
50
240
230
220
210
200
190
180
170
160
150
140
130
60
Temper R820
400 °C
500 °C
600 °C
0
10
20
30
40
Time (min)
50
Vickers hardness
after heat treatment
(typical values)
60
S23
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
R540, R600, R660,
R740, R820
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
· 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, info@wieland.de
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