Bronze CUSN6

Bronze CuSn6 is a binary alloy composed of copper alloy containing about 6% tin. This bronze, also known as CuSn6P, has very good mechanical and chemical properties. It is distinguished by its very high corrosion resistance and good solderability. Thanks to its properties, CuSn6 bronze is ideal for use in the electrical and mechanical industry.

Different names for CuSn6 :

CuSn6 and its properties :

CuSn6 has several properties common to all bronzes such as high mechanical and electrical characteristics. CuSn6 has good electrical conductivity, wear resistance and resistance to industrial atmosphere. It is also resistant to seawater and is largely insensitive to stress corrosion cracking.

It has a very good cold deformation and average deformation when hot. It has good machining, welding and brazing capabilities.

The bronze CuSn6P can be used instead of brass in the vacuum technique. See technical data sheet for CuSn6 bronze.

Hot deformability Very low
Cold deformability Good
Cold reduction before annealing 70% 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


Applications :

CuSn6 bronze is an alloy used in industry and mechanical engineering for the manufacture of stamped and bent parts, connectors, pins, springs, watch hands, in heating applications, resistance wires and other applications with high mechanical requirements for corrosion resistance.

Chemical composition in % Physical characteristics (at 20°C)
Sn 5.5 - 7.0 Density (kg/dm3) 8.8
P 0.01 - 0.40 Electrical conductivity (%IACS) 15.5
Zn 0.2 max Electrical resistivity (MS/m) 10.5
Ni 0.2 max Thermal conductivity (W/m.K) 75
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) 900 - 1050
  Shear modulus (kN/mm²) 45


Supplier of bronze CuSn6P

Metal Rolling Service offers you a tailor-made service by ordering sufficient quantities of the bronze CuSn6P, CW452K, C51900 according to your needs. In this way you avoid unnecessary stocks and keep some of your cash for other projects!

Contact us for a quote on this bronze alloy and to place your order for CuSn6.


Other bronze alloys available to order

We propose other bronze alloys to order according to your real needs, discover our other available products :

CuSn8 – Chrysocale CuSn3Zn9 – CuSn4