Silicon-Aluminum Bronze C64200
Copper Alloy No. C64200
Silicon Aluminum Bronze, ASTM B150 CDA 642
Chemical Composition % by weight
Silicon Aluminum Bronze, ASTM B150 CDA 642
Chemical Composition % by weight
| Element | Nominal | Minimum | Maximum |
| Copper | 91.2 | Rem. | Rem. |
| Lead | - | - | .05 |
| Iron | - | - | .30 |
| Tin | - | - | .20 |
| Zinc | - | - | .50 |
| Aluminum | 7 | 6.3 | 7.6 |
| Manganese | - | - | .10 |
| Silicon | 1.8 | 1.5 | 2.2 |
| Nickel (incl. Co) | - | - | .25 |
| Arsenic | - | - | .15 |
Applications
Valve stems, gears, marine hardware, pole line hardware, bolts, nuts, valve bodies and components.
Common Fabrication Processes
Hot forming, forging, machining.
Mechanical Properties
Typical for 1-1/2" Rod Hard (10%) Temper
| Hardness* | Rockwell B Scales | 90 |
| Tensile Strength** | KSI | 93 |
| Yield Strength** (.5% EAU) | KSI | 60 |
| Elongation** | % in 2 inch | 26 |
**Test values are nominal approximations and depend on specimen size and orientation.
Physical Properties
| Thermal Conductivity | BTU/ (sq ft-ft-hr-F) | 26 |
| Specific Heat | BTU/lb/ºF @ 68F | .09 |
| Thermal Expansion | Per °F from 68 F to 572 F | .0000100 |
| Density | lb/cu in @ 68 F | .278 |
| Electrical Conductivity* (Annealed) | % IACS @ 68 F | 8 |
| Modulus of Elasticity (Tension) | KSI | 16,000 |
*Volume basis
Fabrication Properties
| Capacity for being cold worked | Poor |
| Capacity for being hot formed | Excellent |
| Hot forgeability rating (forging brass =100) | 80 |
| Suitability for being joined by: | Soldering/Not Recommended |
| Brazing/Fair | |
| Oxyacetylene Welding/Not Recommended | |
| Gas Shielded Arc Welding/Fair | |
| Coated Metal Arc Welding/Fair | |
| Resistance Welding | Spot/Fair |
| Seam/Fair | |
| Butt/Fair |