properties of silicon bronze, c655

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Copper Alloys Silicon Bronze, C655

Chemistry Data

Iron

0.8 max

Lead

0.05 max

Manganese

0.5 - 1.3

Nickel

Includes Co

Remainder Each

Cu, including Ag

Remainder Total

Cu + sum of named elements 99.5 min

Silicon

2.8 - 3.8

Zinc

1.5 max

General Information

Principal Design Features

Bronzes (Copper-Silicon), High Silicon Bronze A. Moderate strength, good corrosion resistance, similar to C64200 in properties and applications.

Applications

Applications similar to aluminum bronzes. Used for valve guides, valve stems, fasteners, pole line hardware, and marine fittings.

Machinability

The machinability rating of this alloy is 30. (Where Alloy 360 FC Brass is 100).

Welding

Soldering of this alloy is rated as "good", brazing is rated as "excellent", oxyacetylene welding is rated as "good", gas shielded arc welding is rated as "excellent", coated metal arc welding is rated as "fair", spot welding is rated as "excellent", seam welding is rated as "excellent", and butt welding is rated as "excellent".

Forging

The hot forgeability rating of this alloy is 40. (Forging Brass=100). The recommended hot working temperature for this alloy is between 1300 and 1600 F.

Hot Working

This alloy's capacity for being hot formed is rated as "excellent".

Cold Working

The capacity for cold working this alloy is rated as "excellent".

Annealing

The annealing temperature for this alloy is between 900 and 1300 F.

Physical Data

Density (lb / cu. in.)

0.308

Electrical Resistivity (microhm-cm (at 68 Deg F))

148

Melting Point (Deg F)

1780

Modulus of Elasticity Tension

15000

Mechanical Data