Brass Copper Castings India
Copper Alloy No. C93800


Copper Alloy No. C93800
High Leaded Tin Bronze SAE 67 , CDA 938 , 78-7-15
ASTM B 505 , ASTM B 271, ASTM B 584
Chemical Composition % by weight
Element Nominal Minimum Maximum
Aluminum - - .005
Antimony - - .8
Copper 77 75 79
Iron - - .15
Lead 14.5 13 16
Nickel - - 1
Phosphorus - - .05
Silicon - - .005
Sulfur - - .08
Tin 6.9 6.3 7.5
Zinc - - .8

Applications

Bearings for general service and moderate pressures, pump impellers and bodies for use in acid mine water. Turbocharger bearings.

Mechanical Properties

M07 - As Continuous Cast

Hardness* Brinell Hardness (500 kg load) 55
Tensile Strength** KSI 30
Yield Strength ** KSI (0.5% Ext. under load) 16
Elongation** % in 2 inch 18

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

Physical Properties

Thermal Conductivity BTU/ (sq ft-ft-hr-F) 30
Specific Heat BTU/lb/ºF @ 68F .09
Thermal Expansion Per °F from 68 F to 400 F .0000103
Density lb/cu in @ 68 F .334
Electrical Conductivity* (Annealed) % IACS @ 68 F 11.5
Modulus of Elasticity KSI 10,500

*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) 80
Suitability for being joined by: Soldering/Good
Brazing/Poor*
Oxyacetylene Welding/Not Recommended
Gas Shielded Arc Welding/Not Recommended
Coated Metal Arc Welding/Not Recommended