Manganese Bronze C86300
Copper Alloy No. C86300
High Tensile Manganese Bronze , SAE 430B , CDA 863
Chemical Composition % by weight
High Tensile Manganese Bronze , SAE 430B , CDA 863
Chemical Composition % by weight
| Element | Nominal | Minimum | Maximum |
| Aluminum | 6 | 5 | 7.5 |
| Copper | 63 | 60 | 66 |
| Iron | 3 | 2 | 4 |
| Lead | - | - | .20 |
| Manganese | 3 | 2.5 | 5 |
| Nickel | - | - | 1 |
| Tin | - | - | .20 |
| Zinc | 25 | 22 | 28 |
Applications
Extra heavy duty high strength alloy for large valve stems, gears, cams, slow speed heavy load bearings, screw down nuts, hydraulic cylinder parts
Mechanical Properties
M07 - As Continuous Cast
| Hardness* | Brinell Hardness (3000 kg load) | 225 |
| Tensile Strength** | KSI | 110 min |
| Yield Strength ** | KSI (0.5% Ext. under load) | 62 min |
| Elongation** | % in 2 inch | 14 |
**Test values are nominal approximations and depend on specimen size and orientation.
Physical Properties
| Thermal Conductivity | BTU/ (sq ft-ft-hr-F) | 20.5 |
| Specific Heat | BTU/lb/ºF @ 68F | .09 |
| Thermal Expansion | Per °F from 68 F to 500 F | .000012 |
| Density | lb/cu in @ 68 F | .283 |
| Electrical Conductivity* (Annealed) | % IACS @ 68 F | 8 |
| Modulus of Elasticity | KSI | 14,200 |
*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) | 20 |
| Suitability for being joined by: | Soldering/Poor |
| Brazing/Poor | |
| Oxyacetylene Welding/Poor | |
| Gas Shielded Arc Welding/Poor | |
| Coated Metal Arc Welding/Good |