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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 |
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Brazing/Excellent* |
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Oxyacetylene Welding/Fair |
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Carbon Arc Welding/Not
Recommended |
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Gas Shielded Arc Welding/Good |
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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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