CuSn7Zn4Pb7-C - GS

(CC 483)

Standard description
Classification in accordance with DIN EN 1982	CuSn7Zn4Pb7-C - GS
Material number in accordance with DIN EN 1982	CC493K
Old classification in accordance with DIN 1705 and DIN 1716	G-CuSn7ZnPb
Old material no.	2.1090.01

Chemical composition in weight %
Copper Cu	81.0-85.0 (including nickel)
Nickel Ni	< 2.0
Phosphorus P	< 0.10
Lead Pb	5.0-8.0
Tin Sn	6.0-8.0
Aluminium Al	< 0.01
Iron Fe	< 0.2
Sulphur S	< 0.10
Antimony Sb	< 0.3
Silicon Si	< 0.01
Zinc Zn	2.0-5.0

Physical properties
Density g/cm³	8.8
Melting range °C	860-1020
Amount of shrinkage °C	1.3-1.5
electr. conductivity at 20°C MS/m	7.5
Thermal conductivity at 20°C W/(m*K)	64
Linear thermal expansion coefficient 10-6/K	18.5

Mechanical properties
Tensile strength Rm (MPa)	230
0.2% - yield strength RP 0.2 (MPa)	120
Elongation at break A (%)	15
Brinell hardness HB10	60

Technological properties
Elasticity modulus GPa	98-115
Flexural strength MPa	110
Shear strength MPa	180-190

Chip brazing and weldability
Machinability	1
Brazing	medium
Gas welding	poor
Inert gas welding	poor

Comments
Medium-hard bearing material with good resistance to galling; seawater-resistant.