C92900 Leaded Tin Bronze CDA 929
Copper Alloy No. C92900
Leaded Nickel Tin Bronze CDA 929
ASTM B 505
Chemical Composition % by weight
Element Nominal Minimum Maximum Aluminum - - .005 Antimony - - .25 Copper 84 82 86 Iron - - .20 Lead 2.6 2 3.2 Nickel 3.4 2.8 4 Phosphorus - - .50 Silicon - - .005 Sulfur - - .05 Tin 10 9 11 Zinc - - .25
Applications
Gear, wear plates and guides, cams.
Mechanical Properties
M07 - As Continuous Cast
Hardness Brinell Hardness (500 kg load) 80 Tensile Strength KSI 45 min Yield Strength KSI (0.5% Ext. under load) 25 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/ºF @ 68F .09 Thermal Expansion Per °F from 68 F to 392 F .0000095 Density lb/cu in @ 68 F .320 Electrical Conductivity* (Annealed) % IACS @ 68 F 9.2 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) 40 Suitability for being joined by: Soldering/Excellent 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.