Bronze CuSn8 ou CuSn9P

CuSn8 is a copper alloy reinforced with a solid solution (bronze) containing 7.5 to 8.5% tin. CuSn8 is a phosphor bronze with high friction properties. High grade tin provides high mechanical strength and elasticity with adequate conductivity (it is 13% IACS at 20°C). The alloy is very wear resistant, has very good corrosion resistance and can be easily welded.

The different standards of CuSn8 :

The CuSn8 alloy has different international standards. It is referred to in various ways as follows:


CuSn8 : its properties

CuSn8 has several properties such as high wear resistance and high strength. It is very malleable, its deformability is excellent when cold, but poor when hot. In addition, CuSn8 has good sliding properties, making it an alloy of choice for mechanical applications. It has good brazing and welding properties.

Hot deformability Low
Cold deformability Good
Cold reduction before annealing 60% max
Machinability (Basic reference: brass from
bar turning CuZn39Pb2 =100)
Soft soldering Excellent
Hard soldering Excellent
Arc welding in a gaseous atmosphere Good
Arc welding with coated wire electrode Medium
Electric resistance welding :
Per point Good
Placed end to end Excellent
Corrosion resistance :
Acids Medium
Sea water Good
Marine Atmosphere Excellent


Consult the technical data sheet for bronze CuSn8.

Field of application of CuSn8

CuSn8 bronze is used in the mechanical engineering, shipbuilding, microtechnology, fittings and connection technology sectors. It is also used for the production of stamped parts, connectors, spring contacts and springs, bushings, sleeves, liners and valve guides.
Metal Rolling, a metal supplier, offers CuSn8 phosphor bronze in small and medium quantities. This way you can order your actual requirements for the manufacture of your parts and thus avoid unnecessary stocks and thus have cash available for other needs. We offer you a tailor-made service; you choose the width, thickness, length and hardness of your CuSn8.
Chemical composition in % Physical characteristics (at 20°C)
Sn 7.5 - 9.0 Density (kg/dm3) 8.8
P 0.01 - 0.40 Electrical conductivity (%IACS) 13
Zn 0.2 max Electrical resistivity (MS/m) 13.3
Ni 0.1 max Thermal conductivity (W/m.K) 54.4
Fe 0.1 max Modulus of elasticity (Kn/mm²) 115
Total other impurities 0.2 max Coef. of thermal expansion (10-6/K) 18.5
Cu Remains Melting temperature (°C) 870 - 1030
  Shear modulus (kN/mm²) 42


Supplier of bronze CuSn8

Metal Rolling Services, supplier of bronze CuSn8, offers you to order your custom-made product. You buy only the quantity of CuSn9P, CW453K, C52100 you need, thus avoiding unnecessary stocks.

Contact us for more information about this alloy or to place your order for CuSn8.

Other alloys available 

We also offer you other bronze alloys to order in sufficient quantities, discover our products:

Chrysocale CuSn3Zn9 - CuSn6 - CuSn4