+ + C92900 Leaded Tin Bronze - CDA 929
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.