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

Comments

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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