Brass Copper Castings India
Tin Bronze Alloy C90700 (SAE 65)


Copper Alloy No. C90700
Tin Bronze Alloy , SAE 65 , CDA 907
ASTM B 505
Chemical Composition % by weight
Element Nominal Minimum Maximum
Aluminum - - .005
Antimony - - .20
Copper 89 88 90
Iron - - .15
Lead - - .50
Nickel - - .50
Phosphorus - - .30
Silicon - - .005
Sulfur - - .05
Tin 11 10 12
Zinc - - .50

Applications

Gears, bearings, bushings.

 Mechanical Properties

Typical for 3" dia. continuous cast bar

Hardness* Brinell Hardness (500 kg load) 105
Tensile Strength** KSI 42
Yield Strength ** KSI (0.5% Ext. under load) 25
Elongation** % in 2 inch 10

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

Physical Properties

Thermal Conductivity BTU/ (sq ft-ft-hr-F) 40.8
Specific Heat BTU/lb/ºF @ 68F .09
Thermal Expansion Per °F from 68 F to 392 F .0000102
Density lb/cu in @ 68 F .317
Electrical Conductivity* (Annealed) % IACS @ 68 F 9.6
Modulus of Elasticity KSI 15,000

*Volume basis

Fabrication Practices

Stress relieving temperature 500 F or 260 C
Time at temperature 1 hour per inch of section thickness
Responds to heat treatment No
Machinability rating (Free Cutting Brass=100) 20
Suitability for being joined by: Soldering/Excellent
Brazing/Good*
Oxyacetylene Welding/Fair
Gas Shielded Arc Welding/Fair
Coated Metal Arc Welding/Fair