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Copper Alloy No. C93600

High Leaded Tin Bronze CDA 936 , 81-7-12 , Modified SAE 64

ASTM B 505 , ASTM B 271

Chemical Composition % by weight

Element Nominal Minimum Maximum
Aluminum - - .005
Copper 81 79 83
Iron - - .20
Lead 12 11 13
Nickel - - 1
Phosphorus - - .15
Silicon - - .005
Sulfur - - .08
Tin 7 6 8
Zinc - - 1

Applications

Bearings and bushings 

Mechanical Properties

M07 - As Continuous Cast

Hardness* Brinell Hardness (500 kg load) 65
Tensile Strength** KSI 35
Yield Strength ** KSI (0.5% Ext. under load) 21
Elongation** % in 2 inch 15

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

Physical Properties

Thermal Conductivity BTU/ (sq ft-ft-hr-F) N/A
Specific Heat BTU/lb/F @ 68F .09
Thermal Expansion Per F from 68 F to 392 F N/A
Density lb/cu in @ 68 F .325
Electrical Conductivity* (Annealed) % IACS @ 68 F 11
Modulus of Elasticity KSI 14,000

*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) 70
Suitability for being joined by: Soldering/Good
Brazing/Good*
Oxyacetylene Welding/Not Recommended
Gas Shielded Arc Welding/Not Recommended
Coated Metal Arc Welding/Not Recommended

*Since brazing is performed at temperatures within the hot-short range, strain must be avoided during the brazing and cooling of this alloy.

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.