Standard designation
| EN: | CuNi9Sn2/CW351H |
| UNS: | C 72500 |
Chemical composition
| Cu: | Balance |
| Ni: | 8,5 - 10,5 % |
| Sn: | 1,8 - 2,8 % |
Physical properties1)
| Density: | 8,9 g/cm³ |
| Electrical conductivity: | 6,4 m/Ω·mm² = 11 % IACS2) |
| Thermal conductivity: | 50 W/m·K |
| Thermal expansion coefficient: | 16,5·10-6/K |
| Modulus of elasticity: | 140 GPa3) |
1) Guideline values for room temperature
2) IACS =International Annealed Copper Standard
3) 1 GPa = 1 kN/mm²
Processing information
| Weldability: | medium |
| Solderability: | medium |
| Stress corrosion cracking: | none |
Mechanical properties
|
Temper |
R380/H110 |
R450/H140 |
R500/H160 |
|
Tensile strength RM |
380-470 MPa4) |
450-530 MPa |
500-580 MPa |
|
Yield strength RP0.2 |
≥ 200 MPa |
≥ 370 MPa |
≥ 450 MPa |
|
Elongation A50 |
≥ 8 % |
≥ 4 % |
- |
|
Hardness HV |
110-150 |
140-170 |
160-190 |
|
Temper |
R560/H180 |
R610/H190 |
|
Tensile strength RM |
560-650 MPa |
≥610 MPa |
|
Yield strength RP0.2 |
≥ 520 MPa |
≥ 580 MPa |
|
Elongation A50 |
- |
- |
|
Hardness HV |
180-210 |
≥ 190 |