Brass Copper Castings India
Manganese Bronze Alloy C67500


Copper Alloy No. C67500
Manganese Bronze A , CDA 675
Chemical Composition % by weight
Element Nominal Minimum Maximum
Copper 58.5 57 60
Lead - - .20
Iron 1.4 .8 2
Tin 1 .8 2
Zinc 39 Remainder
Aluminum - - .25
Manganese .1 .05 .50

Applications

Automotive: Clutch disks, pump rods, shafting.

Hardware: balls, valve stems and bodies.

Common Fabrication Processes

Hot forging and pressing, hot heading and upsetting, machining. 

Mechanical Properties

Typical for 1" Rod Half Hard (20%) Temper

Hardness* Rockwell B Scales 90
Tensile Strength** KSI 84
Yield Strength** (.5% EAU) 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 572 F .0000118
Density lb/cu in @ 68 F .302
Electrical Conductivity* (Annealed) % IACS @ 68 F 24
Modulus of Elasticity (Tension) KSI 15,000

*Volume basis

Fabrication Properties

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