Brass Copper Castings India
C92300 Leaded Tin Bronze


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

Applications

Valves, pipe fittings and high pressure steam castings.

Mechanical Properties

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.

Physical Properties

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

*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) 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