C42500
C42500
Standard
| JIS | DIN | EN | ASTM/UNS/CDA | GB/T |
| C4250 | CuZn9Sn3 | CuSn3Zn9 / CW454K | C42500 | / |
Merit
C42500 is a copper-zinc-tin alloy.It has excellent cold forming properties, good conductivity combined with high strength and hardness. Corrosion resistance, especially against seawater and industrial atmosphere is good and stress corrosion cracking susceptibility is low. Spring properties are good.It provides a low coefficient of friction.
Applications
It is a popular alloy for Switches and Relays, Contacts, Connectors, Terminals, Spring.
JIS: C4250
DIN: CuZn9Sn3
EN: CuSn3Zn9 / CW454K
UNS: C42500
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| Cu | 87.0-90.0 |
| Sn | 1.5-3.0 |
| Zn | Remainder |
| Temper | Tensile Strength(Mpa) | Yield Strength(Mpa) | Elongation (%) | Hardness(HV) | Bending Test(90°)GW | Bending Test(90°)BW |
| R320 | 320-405 | max. 230 | min. 25 | 80-110 | 0 | 0 |
| R380 | 380-430 | min. 200 | min. 16 | 110-140 | 0 | 0 |
| R430 | 425-520 | min. 330 | min. 6 | 140-170 | 0 | 0 |
| R510 | 510-605 | min. 430 | min. 3 | 160-190 | 0 | 1 |
| R580 | 580-690 | min. 520 | – | 180-210 | 1 | 2 |
| R660 | min. 660 | min. 610 | – | min. 200 | – | – |
Physical properties of the above materials are conventional performance indicators.If you have some special requirements,(for example property and tolerance).please contact Kinmachi Company directly，we will give you professional assessments and answers.
| Density (g/cm³) | 8.75 |
| Electrical conductivility IACS%(20℃)* | 25 |
| Modulus of elasticity (KN/mm²) | 126 |
| Coefficient of thermal expansion 10-6/K | 18.4 |
| Thermal conductivity W/(m*K) | 126 |
*value for the lowest temper class