Copper
Alloy No. C90700
Tin
Bronze Alloy , SAE 65 , CDA 907
ASTM B
505
Chemical
Composition % by weight
|
Element |
Nominal |
Minimum |
Maximum |
|
Aluminum |
- |
- |
.005 |
|
Antimony |
- |
- |
.20 |
|
Copper |
89 |
88 |
90 |
|
Iron |
- |
- |
.15 |
|
Lead |
- |
- |
.50 |
|
Nickel |
- |
- |
.50 |
|
Phosphorus |
- |
- |
.30 |
|
Silicon |
- |
- |
.005 |
|
Sulfur |
- |
- |
.05 |
|
Tin |
11 |
10 |
12 |
|
Zinc |
- |
- |
.50 |
Applications
Gears, bearings, bushings.
Mechanical Properties
Typical for 3" dia. continuous
cast bar
| Hardness* |
Brinell Hardness
(500 kg load) |
105 |
| Tensile
Strength** |
KSI |
42 |
| Yield Strength
** |
KSI (0.5% Ext.
under load) |
25 |
| Elongation** |
% in 2 inch |
10 |
**Test values are nominal
approximations and depend on specimen size and orientation.
Physical Properties
| Thermal Conductivity |
BTU/ (sq ft-ft-hr-F) |
40.8 |
| Specific Heat |
BTU/lb/ºF @ 68F |
.09 |
| Thermal Expansion |
Per °F from 68 F to 392 F |
.0000102 |
| Density |
lb/cu in @ 68 F |
.317 |
| Electrical Conductivity* (Annealed) |
% IACS @ 68 F |
9.6 |
| Modulus of Elasticity |
KSI |
15,000 |
*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/Excellent |
| |
Brazing/Good* |
| |
Oxyacetylene
Welding/Fair |
| |
Gas Shielded Arc
Welding/Fair |
| |
Coated Metal Arc
Welding/Fair |
*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.
|
