Brass Copper Castings India
Silicon-Aluminum Bronze C64200


Copper Alloy No. C64200
Silicon Aluminum Bronze, ASTM B150 CDA 642
Chemical Composition % by weight
Element Nominal Minimum Maximum
Copper 91.2 Rem. Rem.
Lead - - .05
Iron - - .30
Tin - - .20
Zinc - - .50
Aluminum 7 6.3 7.6
Manganese - - .10
Silicon 1.8 1.5 2.2
Nickel (incl. Co) - - .25
Arsenic - - .15

Applications

Valve stems, gears, marine hardware, pole line hardware, bolts, nuts, valve bodies and components.

Common Fabrication Processes

Hot forming, forging, machining.

Mechanical Properties

Typical for 1-1/2" Rod Hard (10%) Temper

Hardness* Rockwell B Scales 90
Tensile Strength** KSI 93
Yield Strength** (.5% EAU) KSI 60
Elongation** % in 2 inch 26

**Test values are nominal approximations and depend on specimen size and orientation.

Physical Properties

Thermal Conductivity BTU/ (sq ft-ft-hr-F) 26
Specific Heat BTU/lb/ºF @ 68F .09
Thermal Expansion Per °F from 68 F to 572 F .0000100
Density lb/cu in @ 68 F .278
Electrical Conductivity* (Annealed) % IACS @ 68 F 8
Modulus of Elasticity (Tension) KSI 16,000

*Volume basis

Fabrication Properties

Capacity for being cold worked Poor
Capacity for being hot formed Excellent
Hot forgeability rating (forging brass =100) 80
Suitability for being joined by: Soldering/Not Recommended
Brazing/Fair
Oxyacetylene Welding/Not Recommended
Gas Shielded Arc Welding/Fair
Coated Metal Arc Welding/Fair
Resistance Welding Spot/Fair
Seam/Fair
Butt/Fair