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Copper
Alloy No. C94700 HT
Heat
Treated Nickel Tin Bronze CDA 947 , Nicomet® Bronze
Chemical
Composition % by weight
|
Element |
Nominal |
Minimum |
Maximum |
|
Aluminum |
- |
- |
.005 |
|
Antimony |
- |
- |
.15 |
|
Copper |
88 |
85 |
90 |
|
Iron |
- |
- |
.25 |
|
Lead |
- |
- |
.01 |
|
Manganese |
- |
- |
.20 |
|
Nickel |
5 |
4.5 |
6 |
|
Phosphorus |
- |
- |
.05 |
|
Silicon |
- |
- |
.005 |
|
Sulfur |
- |
- |
.05 |
|
Tin |
5 |
4.5 |
6 |
|
Zinc |
2 |
1 |
2.5 |
Applications
Valve stems and bodies, bearings, wear guides,
shift forks, feeding mechanisms, circuit breaker parts, gears,
piston cylinders, nozzles.
Mechanical Properties
M07/TF00 As Continuous Cast,
Solution and Precipitation Heat Treated
| Hardness* |
Brinell Hardness
(3000 kg load) |
180 |
| Tensile
Strength** |
KSI |
75 min |
| Yield Strength
** |
KSI (0.5% Ext.
under load) |
50 min |
| Elongation** |
% in 2 inch |
5 min |
**Test values are nominal
approximations and depend on specimen size and orientation.
Physical Properties
| Thermal Conductivity |
BTU/ (sq ft-ft-hr-F) |
31.2 |
| Specific Heat |
BTU/lb/ºF @ 68F |
.09 |
| Thermal Expansion |
Per °F from 68 F to 392 F |
.000011 |
| Density |
lb/cu in @ 68 F |
.320 |
| Electrical Conductivity* (Annealed) |
% IACS @ 68 F |
15 |
| 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 |
Yes |
| Solution heat
treating temperature |
1425-1475 F or
775-800 C |
| Time at temperature |
2 hours per inch of
section thickness |
| Quenching medium |
Water |
| Precipitation
hardening temperature |
580-620 F or
305-325 C |
| Time at temperature |
5 hours |
| Quenching medium |
Air |
| Machinability
rating (Free Cutting Brass=100) |
30 |
| Suitability for
being joined by: |
Soldering/Excellent |
| |
Brazing/Excellent* |
| |
Oxyacetylene
Welding/Fair |
| |
Carbon Arc
Welding/Not Recommended |
| |
Gas Shielded Arc
Welding/Good |
| |
Coated Metal Arc
Welding/Good |
*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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