Copper Alloy No. C94500
High Leaded Tin Bronze CDA 945
Chemical Composition % by weight
Element Nominal Minimum Maximum Aluminum - - .005 Antimony - - .8 Copper 74 Remainder Iron - - .15 Lead 20 16 22 Nickel - - 1 Phosphorus - - .05 Silicon - - .005 Sulfur - - .08 Tin 7 6 8 Zinc - - 1.2
Locomotive wearing parts, high load low speed bearings
M07 - As Continuous Cast
Hardness* Brinell Hardness (500 kg load) 50 Tensile Strength** KSI 25 Yield Strength ** KSI (0.5% Ext. under load) 12 Elongation** % in 2 inch 15
**Test values are nominal approximations and depend on specimen size and orientation.
Thermal Conductivity BTU/ (sq ft-ft-hr-F) 30 Specific Heat BTU/lb/ºF @ 68F .09 Thermal Expansion Per °F from 68 F to 392 F .0000103 Density lb/cu in @ 68 F .340 Electrical Conductivity* (Annealed) % IACS @ 68 F 10 Modulus of Elasticity KSI 10,500
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
*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.