Hot forging and pressing, hot heading and upsetting, machining.
Mechanical Properties
Typical for 1" Rod Half Hard (20%) Temper
Hardness*
Rockwell F Scales
90
Tensile Strength**
KSI
84
Yield Strength **
KSI
60
Elongation**
% in 2 inch
19
**Test values are nominal approximations and depend on specimen size and orientation.
Physical Properties
Thermal Conductivity
BTU/ (sq ft-ft-hr-F)
61
Specific Heat
BTU/lb/ºF @ 68F
.09
Thermal Expansion
Per °F from 68 F to 212 F
.0000118
Density
lb/cu in @ 68 F
.304
Electrical Conductivity
% IACS @ 68 F
24
Modulus of Elasticity
KSI
15,000
*Volume basis
Fabrication Practices
Capacity for being cold worked
Poor
Capacity for being hot formed
Excellent
Hot forgeability rating (forging brass =100)
80
Suitability for being joined by:
Soldering/Excellent
Brazing/Excellent
Oxyacetylene Welding/Good
Gas Shielded Arc Welding/Fair
Coated Metal Arc Welding/Not Recommended
Resistance Welding
Spot/Good
Seam/Fair
Butt/Good
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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C67500 Manganese Bronze
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Copper Alloy No. C67500 
