Alloys

CuSn8

Standard designation

EN CW453K / UNS C52100

Chemical composition
Cu Rest
Sn [%] 8
P [%] 0.1
Description / applications

CuSn8 is one of the copper-tin alloys. CuSn8 combines high strength with good electrical properties. Applications: components for the electronics industry, connectors, contact springs, relay springs, leaf springs, switching elements

Physical properties¹
Density 8.8 g/cm³
Electrical conductivity 7.5 m/Ω·mm²
13% IACS²
Thermal conductivity 62 W/m·K
Thermal expansion coefficient 18.5·10-6/K
E modulus 115 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
Condition Tensile strength Rm [MPa] Yield strength Rp0.2 [MPa] Elongation
A50 [%]		 Hardness
HV
R370/H90 370-450 max. 300 min. 50 90-120
R450/H135 450-550 min. 280 min. 20 135-175
R540/H170 540-630 min. 460 min. 13 170-200
R600/H190 600-690 min. 530 min. 5 190-220
R660/H210 660-750 min. 620 min. 3 210-240
R740/H230 740-830 min. 700 min. 2 230-260
R810/H240 min. 810 min. 770 - min. 240

More information

Datasheet
File type
CuSn8
PDF (297.18 KB)