Standard designation

Marking according to DIN EN 1982: CuSn7Zn2Pb3-C - GS
Material number according to DIN EN 1982: CC492K
Old mark based on DIN 1705 and DIN 1716: G-CuSn6ZnNi
Old material no.: 2.1093.01

Chemical composition in wt. %

Copper Cu: 85,0-89,0 (including nickel)
Nickel Ni: < 0,2
Phosphorus P: < 0,10
Lead Pb: 2,5-3,5
Tin Sn: 6,0-8,0
Aluminium Al: < 0,01
Iron Fe: < 0,2
Sulphur S: < 0,10
Antimony Sb: < 0,25
Silicon Si: < 0,01
Zinc Zn: 1,5-3,0

Physical properties

Density g/cm³ 8,7
Melting range °C 830-1030
Shrinkage value °C 1,3-1,5
Electr. conductivity at 20 °C MS/m 7,9
Thermal conductivity at 20 °C W/(m*K) 69
Linear expansion coefficient 10-6/K 18,5

Mechanical characteristics

Tensile strength Rm (MPa) 230
0,2 % - yield strength RP0,2 (MPa) 130
Ultimate tensile strength A (%) 14
Brinell hardness HB10 65

Technological properties

Elastic modulus GPa 90-96
Flexural fatique strength MPa 80
Shear strengt MPa 200-215

Machining brazing-soldering and welbability

Machinability 1
Brazing good
Gas welding medium
Inert gas welding poor


Construction material with good stability and expansion, good for casting, resistant to seawater.

Notes on usage

Already being widely used as a structural material.

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