Brass Copper Castings India
C94300 High Leaded Tin Bronze


Copper Alloy No. C94300
High Leaded Tin Bronze CDA 943 ASTM B 505 , ASTM B 271
Chemical Composition % by weight
Element Nominal Minimum Maximum
Aluminum - - .005
Antimony - - .8
Copper 69.5 67 72
Iron - - .15
Lead 25 23 27
Nickel - - 1
Phosphorus - - .05
Silicon - - .005
Sulfur - - .08
Tin 5.3 4.5 6
Zinc - - .8

Applications

High speed bearings for light loads

Mechanical Properties

M07 - As Continuous Cast

Hardness* Brinell Hardness (500 kg load) 48
Tensile Strength** KSI 21 min
Yield Strength ** KSI (0.5% Ext. under load) 15 min
Elongation** % in 2 inch 7 min

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

Physical Properties

Thermal Conductivity BTU/ (sq ft-ft-hr-F) 36.2
Specific Heat BTU/lb/ºF @ 68F .09
Thermal Expansion Per °F from 68 F to 392 F N/A
Density lb/cu in @ 68 F .336
Electrical Conductivity* (Annealed) % IACS @ 68 F 9
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