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Copper Alloy No.
C93200
SAE 660 Bearing Bronze
, High Leaded Tin Bronze , 83-7-7-3
ASTM B 505 , ASTM B 271
Chemical Composition % by
weight
| Element |
Nominal |
Minimum |
Maximum |
| Aluminum |
- |
- |
.005 |
| Antimony |
- |
- |
.35 |
| Copper |
83 |
81 |
85 |
| Iron |
- |
- |
.20 |
| Lead |
7 |
6 |
8 |
| Nickel |
- |
- |
1 |
| Phosphorus |
- |
- |
.15 |
| Silicon |
- |
- |
.005 |
| Sulfur |
- |
- |
.08 |
| Tin |
6.7 |
6.3 |
7.5 |
| Zinc |
3 |
2 |
4 |
C93200 has excellent machining properties,
good hardness, strength and wear resistance with excellent antifriction
qualities. The alloy is not subject to dezincification and has reasonable
corrosion resistance to seawater and brine making it suitable for pump and
valve components.
C93200 is suitable for bearings, bushings having medium
loads and speeds with adequate lubrications.
Applications
General utility bearings, bushings and
wear plate.
Mechanical Properties
M07 - As Continuous Cast
| Hardness* |
Brinell Hardness (500 kg
load) |
65 |
| Tensile Strength** |
KSI |
35 min |
| Yield Strength ** |
KSI (0.5% Ext. under load) |
20 min |
| Elongation** |
% in 2 inch |
10 min |
**Test values are nominal approximations and depend on specimen
size and orientation.
Physical Properties
| Thermal Conductivity |
BTU/ (sq ft-ft-hr-F) |
33.6 |
| Specific Heat |
BTU/lb/ºF @ 68F |
.09 |
| Thermal Expansion |
Per °F from 68 F to 392 F |
.000010 |
| Density |
lb/cu in @ 68 F |
.322 |
| Electrical Conductivity* (Annealed) |
% IACS @ 68 F |
12 |
| Modulus of Elasticity |
KSI |
14,500 |
*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) |
70 |
| Suitability for being joined by: |
Soldering/Excellent |
|
Brazing/Good* |
|
Oxyacetylene Welding/Not
Recommended |
|
Gas Shielded Arc Welding/Not
Recommended |
|
Coated Metal Arc Welding/Not
Recommended |
*Since brazing is performed at temperatures
within the hot-short range, strain must be avoided during the brazing and
cooling of this alloy.
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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