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Copper Alloy No. C62300

Aluminum Bronze , ASTM B 150 CDA 623 

Chemical Composition % by weight

Element Nominal Minimum Maximum
Copper 87 Rem. Rem.
Iron 3 2 4
Tin - - .60
Aluminum 9.25 8.5 10
Manganese - - .50
Silicon - - .25
Nickel (incl. Co) - - 1

Applications

Bearings, bushings, valve guides, gears, valve seats, nuts, bolts, pump rods, worm gears, cams.

Common Fabrication Processes

Bending, hot forging, forming, machining, welding.

Mechanical Properties

Typical for 1" Rod Half Hard (15%) Temper

Hardness* Rockwell B Scales 88
Tensile Strength** KSI 95
Yield Strength** (.5% EAU) KSI 50
Elongation** % in 2 inch 25

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

Physical Properties

Thermal Conductivity BTU/ (sq ft-ft-hr-F) 31
Specific Heat BTU/lb/F @ 68F .09
Thermal Expansion Per F from 68 F to 572 F .0000090
Density lb/cu in @ 68 F .276
Electrical Conductivity* (Annealed) % IACS @ 68 F 12
Modulus of Elasticity (Tension) KSI 17,000

*Volume basis

Fabrication Properties

Capacity for being cold worked Good
Capacity for being hot formed Good
Machinability Rating (Free Cutting Brass=100) 50
Suitability for being joined by: Soldering/Not Recommended
Brazing/Fair
Oxyacetylene Welding/Not Recommended
Gas Shielded Arc Welding/Good
Coated Metal Arc Welding/Good
Resistance Welding Spot/Good
Seam/Good
Butt/Good

The values listed above represent reasonable approximations suitable for general engineering use. Due to commercial variations in composition and to manufacturing limitations, they should not be used for specification purposes. See applicable A.S.T.M. specification references.