Standard designation

Marking according to DIN EN 1982: CuSn5Zn5Pb5-C - GS
Material number according to DIN EN 1982: CC491K
Old mark based on DIN 1705 and DIN 1716: G-CuSn5ZnPb
Old material no.: 2.1096.01

Chemical composition in wt. %

Copper Cu: 83,0-87,0 (including nickel)
Nickel Ni: < 2,0
Phosphorus P: < 0,10
Lead Pb: 4,0-6,0
Tin Sn: 4,0-6,0
Aluminium Al: < 0,01
Iron Fe: < 0,3
Sulphur S: < 0,10
Antimony Sb: < 0,25
Silicon Si: < 0,01
Zinc Zn: 4,0-6,0

Physical properties

Density g/cm³ 8,7
Melting range °C 860-1030
Shrinkage value °C 1,3-1,5
Electr. conductivity at 20 °C MS/m 8,5
Thermal conductivity at20 °C W/(m*K) 71
Linear expansion coefficient 10-6/K 18,2

Mechanical characteristics

Tensile strength Rm (MPa) 200
0,2 % - yield strength RP0,2 (MPa) 90
Ultimate tensile strength A (%) 13
Brinell hardness HB10 60

Technological properties

Elastic modulus GPa 65-105
Flexural fatique strength MPa 75
Shear strength MPa 165-175

Machining brazing-soldering and weldability

Machinability 1
Brazing medium
Gas welding poor
Inert gas welding poor


Structural material, good for casting, soft and can be brazed to some extent, resistant to sea water.

Notes on usage

Water and steam valve housings up to 226 °C, normally stressed pump bodies and thin-walled complex castings.

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