Bronze CuSn4

CuSn4 bronze is a copper alloy reinforced by a solid solution with 4% tin.

CuSn4 offers an excellent combination of strength, formability and hardness. It has good electrical conductivity and good corrosion resistance. Welding and brazing properties are excellent.

CuSn4 standards :

The CuSn4 alloy has different international standards and is designated in different ways as shown below:

France (AFNOR): CuSn4
Germany (DIN): CuSn4
Europe (EN): CW450K
ASTM : C51100

CuSn4 and its properties :

It has very good properties that make it resistant to industrial atmosphere. It has good electrical conductivity, excellent formability, very good corrosion and abrasion resistance. It can be easily welded and brazed.

See CuSn4 technical data sheet.

Hot deformability	Low
Cold deformability	Excellent
Cold reduction before annealing	80% max
Machinability (Basic reference: brass from bar turning CuZn39Pb2 =100)	20
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	Excellent
Sea water	Good
Marine Atmosphere	Medium

Applications :

CuSn4 bronze is used in various fields. Its main use is for the production of electrical connectors, but it is also used for the production of components in electrical engineering, relays and conductive springs, retaining clips, metal pipes, bushings and in mechanical engineering.

Chemical composition in %		Physical characteristics (at 20°C)
Sn	3.0 - 5.0	Density (kg/dm3)	8.85
P	0.01 - 0.40	Electrical conductivity (%IACS)	20.5
Zn	0.2 max	Electrical resistivity (MS/m)	12
Ni	0.2 max	Thermal conductivity (W/m.K)	84
Fe	0.1 max	Modulus of elasticity (Kn/mm²)	118
Total other impurities	0.2 max	Coef. of thermal expansion (10-6/K)	18.2
Cu	Remains	Melting temperature (°C)	960 - 1070
		Shear modulus (kN/mm²)	45

Supplier of bronze CuSn4

Supplier of ferrous and non-ferrous metals, Metal Rolling offers you to order the bronze CuSn4 in the desired quantity according to our stocks.

We can supply you with CuSn4 :

In strips, strips, coils with sheared, deburred, round or softened edge finishes.
In sheets 1000 x 2000 mm or other formats on request.

Other bronze alloys available

We offer you other bronze alloys to order according to your needs:

CuSn6 – CuSn8 – Chrysocale