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Copper Alloy No.
C86300
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 |
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Brazing/Poor |
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Oxyacetylene Welding/Poor |
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Gas Shielded Arc Welding/Poor |
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Coated Metal Arc Welding/Good |
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.
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