Alloys

CuSn5

Standard designation

EN CW451K/UNS C51000

Chemical composition
Cu Rest
Sn [%] 5
P [%] 0.1
Description/applications

CuSn5 is one of the copper-tin alloys. CuSn5 is predominantly used where a high-strength bronze is combined with good electrical conductivity. Applications: connectors, contact pins, switching elements, parts for machine and equipment engineering

Physical properties¹
Density 8.85 g/cm³
Electrical conductivity 10 m/Ω·mm²
17.2 % IACS²
Thermal conductivity 82 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
R310/H75 310-390 max. 250 min. 45 75-105
R400/H120 400-500 min. 240 min. 14 120-160
R490/H160 490-580 min. 430 min. 8 160-190
R550/H180 550-640 min. 510 min. 4 180-210
R630/H200 630-720 min. 600 min. 2 200-230
R690/H220 min. 690 min. 670 - min. 220

More information

Data sheet
File type
CuSn5
PDF (187.68 KB)