Standard designation
| EN: | CuSn4/CW450K |
| UNS: | C 51100 |
Chemical composition
| Cu: | Balance |
| Sn: | 3,5 - 4,5 % |
| P: | 0,01 - 0,4 % |
Physical properties1)
| Density: | 8,9 g/cm³ |
| Electrical conductivity: | 11,5 m/Ω·mm² = 20 % IACS2) |
| Thermal conductivity: | 84 W/m·K |
| Thermal expansion coefficient: | 18,2·10-6/K |
| Modulus of elasticity: | 118 GPa3) |
1) Guideline values for room temperature
2) IACS =International Annealed Copper Standard
3) 1 GPa = 1 kN/mm²
Processing information
| Weldability: | good |
| Solderability: | very good |
| Stress corrosion cracking: | none |
Mechanical properties
|
Temper |
R290/H70 |
R390/H115 |
R480/H150 |
|
Tensile strength RM |
290-390 MPa4) |
390-490 MPa |
480-570 MPa |
|
Yield strength RP0,2 |
≤ 190 MPa |
≥ 210 MPa |
≥ 420 MPa |
|
Elongation A50 |
≥ 40 % |
≥ 11 % |
≥ 4 % |
|
Hardness HV |
70-100 |
115-155 |
150-180 |
|
Temper |
R540/H170 |
R610/H190 |
|
Tensile strength RM |
540-630 MPa |
≥ 610 MPa |
|
Yield strength RP0,2 |
≥ 490 MPa |
≥ 540 MPa |
|
Elongation A50 |
≥ 3 % |
- |
|
Hardness HV |
170-200 |
≥ 190 |