Standard designation

Marking according to DIN EN 1982: CuSn12Ni2-C - GS
Material number according to DIN EN 1982: CC484K
Old mark based on DIN 1705 and DIN 1716: G-CuSn12Ni
Old material no.: 2.1060.01

Chemical composition in wt. %

Copper Cu 84,5-87,5
Nickel Ni 1,5-2,5
Phosphorus P 0,05-0,40
Lead Pb < 0,3
Tin Sn 11,0-13,0
Aluminium Al < 0,01
Iron Fe < 0,2
Manganese Mn < 0,2
Sulphur S < 0,05
Antimony Sb < 0,1
Silicon Si < 0,01
Zinc Zn < 0,4

Physical properties

Density g/cm³ 8,6
Melting range °C 830-1010
Shrinkage value °C 1,5
Electrl. conductivity at 20 °C MS/m 6,2
Thermal conductivity at 20 °C W/(m*K) 54
Linear expansion coefficient10-6/K 17,5

Mechanical characteristics

Tensile strength Rm (MPa) 280
0,2 % - yield strength RP0,2 (MPa) 160
Ultimate tensile strength A (%) 12
Brinell hardness HB10 85

Technological properties

Elastic modulus GPa 90-110
Flexural fatique strength MPa 140
Shear strength MPa 210-225

Machining brazing-soldering and weldability

Machinability 3
Brazing good
Gas welding medium
Inert gas welding medium

Comments

Structural material with very good wear resistance, corrosion and salt water resistant, resistant to cavitation stress.

Notes on usage

Heavily loaded dome bricks and coupling pieces, spindle nuts moved under load, highly stressed, fast-running worm crown gears and screw crowns. Highly stressed valves and pump bodies, stators, impellers and paddle wheels for pumps and water turbines. Load characteristics for worm gears during continuous operation depending on the conduction velocity =1.5 to 8 MPa, for intermittent loads p=20 to 25 MPa.

 

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