Standard designation

Marking according to DIN EN 1982: CuSn12-C - GS
Material number according to DIN EN 1982: CC483K
Old mark based on DIN 1705 and DIN 1716: G-CuSn12
Old material no.: 2.1052.01

Chemical composition in wt. %

Copper Cu 85,0-88,5
Nickel Ni < 0,2
Phosphorus P < 0,6
Lead Pb < 0,7
Tin Sn 11,0-13,0
Aluminium Al < 0,01
Iron Fe < 0,2
Manganese Mn < 0,2
Sulphur S < 0,05
Antimony Sb < 0,15
Silicon Si < 0,01
Zinc Zn < 0,5

Physical properties

Density g/cm³ 8,6
Melting range °C 830-1000
Shrinkage value °C 1,5
Electr. conductivity at 20 °C MS/m 6,2
Thermal conductivity at 20 °C W/(m*K) 54
Linear expansion coefficient 10-6/K 18,5

Mechanical characteristics

Tensile strength Rm (MPa) 260
0,2 % - yield strength RP0,2 (MPa) 140
Ultimate tensile strength A (%) 7
Brinell hardness HB10 80

Technological properties

Elastic modulus GPa 90-110
Flexural fatique strength MPa 90
Shear strength MPa 195-210

Machining brazing-soldering and weldability

Machinability 3
Brazing good
Gas welding medium
Inter gas welding medium


Material with good wear resistance, corrosion and salt water resistant. The materials CuSn12Ni2-C - GS and CuSn11Pb2 - GS were developed from this alloy. They are distinguished by increased stability and wear resistance along with improved antifriction properties.

Notes on usage

Dome bricks and coupling pieces, spindle nuts moved under load, worm gears and screw gears.

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