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 |