Copper Alloy No. C92800
Leaded Tin Bronze CDA 928
ASTM B 505
Chemical Composition % by weight
Element Nominal Minimum Maximum Aluminum - - .005 Antimony - - .25 Copper 79 78 82 Iron - - .20 Lead 5 4 6 Nickel - - .50 Phosphorus - - .05 Silicon - - .005 Sulfur - - .05 Tin 16 15 17 Zinc - - .50
M07 - As Continuous Cast
Hardness* Rockwell B Scales 80 Tensile Strength** KSI 40 Yield Strength ** KSI (0.5% Ext. under load) 30 Elongation** % in 2 inch 1
**Test values are nominal approximations and depend on specimen size and orientation.
Thermal Conductivity BTU/ (sq ft-ft-hr-F) N/A Specific Heat BTU/lb/ºF @ 68F .09 Thermal Expansion Per °F from 68 F to 350 F N/A Density lb/cu in @ 68 F N/A Electrical Conductivity* (Annealed) % IACS @ 68 F N/A Modulus of Elasticity KSI 16,000
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/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.
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.