Locomotive wearing parts, high load low speed bearings
Mechanical Properties
M07 - As Continuous Cast
Hardness*
Brinell Hardness (500 kg load)
50
Tensile Strength**
KSI
25
Yield Strength **
KSI (0.5% Ext. under load)
12
Elongation**
% in 2 inch
15
**Test values are nominal approximations and depend on specimen size and orientation.
Physical Properties
Thermal Conductivity
BTU/ (sq ft-ft-hr-F)
30
Specific Heat
BTU/lb/ºF @ 68F
.09
Thermal Expansion
Per °F from 68 F to 572 F
.0000103
Density
lb/cu in @ 68 F
.340
Electrical Conductivity* (Annealed)
% IACS @ 68 F
10
Modulus of Elasticity
KSI
10,500
*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)
80
Suitability for being joined by:
Soldering/Good
Brazing/Poor*
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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