C92600 / CDA 926 Leaded Tin Bronze Alloys
Chemical Composition ( % by weight ) :
| Element | Nominal | Minimum | Maximum |
| Aluminum | – | – | .005 |
| Antimony | – | – | .25 |
| Copper | 87 | 86 | 88.5 |
| Iron | – | – | .20 |
| Lead | 1 | .8 | 1.2 |
| Nickel | 1 | .8 | .7 |
| Phosphorus | – | – | .03 |
| Silicon | – | – | .005 |
| Sulfur | – | – | .05 |
| Tin | 10 | 9.3 | 10.5 |
| Zinc | 2 | 1.3 | 2.5 |
Applications :
Bearings, bushings, pump impellers, piston rings, valve components, steam fittings, gears.
Mechanical Properties : (M07 – As Continuous Cast )
| Hardness* | Brinell Hardness (500 kg load) | 70 |
| Tensile Strength** | KSI | 44 |
| Yield Strength ** | KSI (0.5% Ext. under load) | 20 |
| Elongation** | % in 2 inch | 30 |
**Test values are nominal approximations and depend on specimen size and orientation.
Physical Properties :
| 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 | .000010 |
| Density | lb/cu in @ 68 F | .315 |
| Electrical Conductivity* (Annealed) | % IACS @ 68 F | 9 |
| Modulus of Elasticity | KSI | 15,000 |
*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.
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.