C42500 Copper tin zinc alloy introduction
C42500 alloy has moderate conductivity, comparable strength to phosphorus bronze, excellent fatigue performance, and good wear resistance. C42500 is resistant to atmospheric and seawater corrosion, and is not sensitive to stress corrosion cracking. This material is very suitable for applications in automobiles, industrial connectors, and shrapnel.
| Grade | Chemical composition（%）≤ | Thickness (mm) |
|||||
| ASTM | Cu | Sn | P | Fe | Pb | Zn | 0.1-2.0 |
| C42500 | 87-90 | 1.5-3.0 | 0.35 | 0.05 | 0.05 | Balance | |
| Physical properties | |||||||
| Density (g/cm³) |
Modulus of elasticity (GPa) |
Thermal expansion coefficient (×10-6/K) |
Electrical conductivity (%IACS) |
Thermal conductivity W(m·K) |
|||
| 8.75 | 115 | 18.4 | 28 | 120 | |||
| Mechanical properties | Bend properties | ||||||
| Temper | Vickers Hardness HV0.2 |
Tension test | 90°R/T(Thick≤0.5mm) | ||||
| Tensile Strength （MPa） |
Yield Strength (MPa） |
Elongation % （A50） |
Good way | Bad way | |||
| R395（1/2H） | 110-150 | 395-485 | 355-465 | ≥18 | 0 | 0 | |
| R430（3/4H） | 130-170 | 430-510 | 400-490 | ≥12 | 0 | 0 | |
| R485（H） | 160-180 | 485-565 | 455-545 | ≥9 | 0 | 0.5 | |
| R525（EH） | 170-190 | 525-605 | 495-585 | ≥7 | 0.5 | 1 | |
| R580（SH） | 180-200 | 580-650 | 550-630 | ≥3 | 1.5 | 2.5 | |
| R635（ESH） | ≥200 | ≥635 | ≥600 | - | - | - | |
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