CuSn4
Standard designations
EN CW450K/UNS C51100
| Chemical composition | |
|---|---|
| Cu | Rest |
| Sn [%] | 4 |
| P [%] | 0.1 |
Description/applications
CuSn4 is one of the copper-tin alloys. CuSn4 is the alloy with the highest electrical conductivity within the bronze group. Applications: Plug connectors, components from the electronics industry, contact pins, relay connections
| 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 |
| E modulus | 118 GPa |
| ¹Approximate values in soft state, measured at ambient temperature ² IACS = International Annealed Copper Standard |
|
| Processing information | |
|---|---|
| Weldability | good |
| Solderability | very good |
| Stress crack corrosion | None |
| Mechanical properties | |||||
|---|---|---|---|---|---|
| State | Tensile strength Rm [MPa] | Yield strength Rp0.2 [MPa] | Elongation A50 [%] |
Hardness HV |
|
| R290/H70 | 290-390 | max. 190 | min. 40 | 70-100 | |
| R390/H115 | 390-490 | min. 210 | min. 11 | 115-155 | |
| R480/H150 | 480-570 | min. 420 | min. 4 | 150-180 | |
| R540/H170 | 540-630 | min. 490 | min. 3 | 170-200 | |
| R610/H190 | min. 610 | min. 540 | - | min. 190 |