COPPER & COPPER ALLOY PRODUCTS
WROUGHT COPPER ALLOYS
CONTINUOUS CAST COPPER ALLOYS
CENTRIFUGAL CAST COPPER ALLOYS
MADE TO ORDER COPPER ALLOYS
FINISHED MACHINE PARTS
HYDRAULIC & PNEUMATIC PARTS
CONTINUOUS CAST PRODUCTION
COPPER ALLOY DATABASE
CONTINUOUS CAST IRON PRODUCTS
QUALITY CONTROL PROCEDURES
NEW PRODUCTS & IMPROVEMENTS
red.gif (248 bytes) ONLINE INQUIRY FORM

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/F @ 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

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.