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Copper Alloy No. C93400

High Leaded Tin Bronze CDA 934

ASTM B 505

Chemical Composition % by weight

 

Element Nominal Minimum Maximum
Aluminum - - .005
Antimony - - .50
Copper 84 82 85
Iron - - .15
Lead 8 7 9
Nickel - - 1
Phosphorus - - .50
Silicon - - .005
Sulfur - - .08
Tin 8 7 9
Zinc - - .8

 

Applications

Bearings and bushings 

Mechanical Properties

M07 - As Continuous Cast

Hardness* Brinell Hardness (500 kg load) 60
Tensile Strength** KSI 34 min
Yield Strength ** KSI (0.5% Ext. under load) 20 min
Elongation** % in 2 inch 8 min

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

Physical Properties

Thermal Conductivity BTU/ (sq ft-ft-hr-F) 33.6
Specific Heat BTU/lb/F @ 68F .09
Thermal Expansion Per F from 68 F to 392 F .000010
Density lb/cu in @ 68 F .320
Electrical Conductivity* (Annealed) % IACS @ 68 F 12
Modulus of Elasticity KSI 11,000

*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.

© 1998 Conex Metals.

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