Copper Alloy No. C92300
Leaded Tin Bronze , CDA 923 Leaded G Bronze , 87-8-1-4
ASTM B 505 , ASTM B 271
Chemical Composition % by weight
Element Nominal Minimum Maximum Aluminum - - .005 Antimony - - .25 Copper 87 85 89 Iron - - .25 Lead .65 .3 1 Nickel - - 1 Phosphorus - - .05 Silicon - - .005 Sulfur - - .05 Tin 8 7.5 9 Zinc 4 2.5 5
Valves, pipe fittings and high pressure steam castings.
M07 - As Continuous Cast
Hardness* Brinell Hardness (500 kg load) 70 Tensile Strength** KSI 40 min Yield Strength ** KSI (0.5% Ext. under load) 19 min Elongation** % in 2 inch 16 min
**Test values are nominal approximations and depend on specimen size and orientation.
Thermal Conductivity BTU/ (sq ft-ft-hr-F) 43.2 Specific Heat BTU/lb/ºF @ 68F .09 Thermal Expansion Per °F from 68 F to 350 F .000010 Density lb/cu in @ 68 F .317 Electrical Conductivity* (Annealed) % IACS @ 68 F 12 Modulus of Elasticity KSI 14,000
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) 42 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.