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.

Cu 87.0-90.0
Sn 1.5-3.0
Zn Remainder

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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

微信图片_20241127140256(1)
JIS: C4250
DIN: CuZn9Sn3
EN: CuSn3Zn9 / CW454K
UNS: C42500
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