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Copper Alloy No.
C67300
Manganese Silicon
Bronze , CDA 673
Chemical Composition % by
weight
| Element |
Nominal |
Minimum |
Maximum |
| Copper |
60.5 |
58 |
63 |
| Lead |
1.7 |
.40 |
3 |
| Iron |
- |
- |
.50 |
| Tin |
- |
- |
.30 |
| Zinc |
Remainder |
| Nickel
(incl. Co) |
- |
- |
.25 |
| Aluminum |
- |
- |
.25 |
| Manganese |
2.75 |
2 |
3.5 |
| Silicon |
1 |
.5 |
1.5 |
Applications
Hydraulic piston shoes, cylinder liners,
cams.
Common Fabrication Processes
Machining
Mechanical Properties
Typical for 2" Bar As Extruded Temper
| Hardness* |
Rockwell B Scales |
78 |
| Tensile Strength** |
KSI |
75 |
| Yield Strength** (.5% EAU) |
KSI |
36 |
| 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) |
58 |
| Specific Heat |
BTU/lb/ºF @ 68F |
.09 |
| Thermal Expansion |
Per °F from 68 F to 572 F |
.000011 |
| Density |
lb/cu in @ 68 F |
.293 |
| Electrical Conductivity* (Annealed) |
% IACS @ 68 F |
23 |
| Modulus of Elasticity (Tension) |
KSI |
16,000 |
*Volume basis
Fabrication Properties
| Capacity for being cold worked |
Fair |
| Suitability for being joined by: |
Soldering/Good |
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Brazing/Not Recommended |
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Oxyacetylene Welding/Not
Recommended |
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Gas Shielded Arc Welding/Fair |
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Coated Metal Arc Welding/Not
Recommended |
| Resistance Welding |
Spot/Good |
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Seam/Good |
|
Butt/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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