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Ensinger PEI
Ampco Metal AMPCO® 674 Manganese Bronze
Categories: Metal; Nonferrous Metal; Copper Alloy; Bronze

Material Notes: Ampco 673 and 674 are wrought zinc-manganese-silicon lead-copper alloys. Both alloys have excellent capacity for hot forming, with hot forgeability ratings of 100. Ampco 674 exhibits a machinability rating of 25%, while Ampco 673 has a considerably higher rating of 80%. This significant difference in the two materials is in the higher lead content of Ampco 673 which increases that alloy's machinability but decreases its tensile and yield values.

Applications: Widely specified for a variety of bearing and/or corrosive applications: bushings; gears; cams; nuts and bolts; connector rods; idler shafts and other shafting; worm gears; feed fingers; lead nut screws, etc.

Key Words: UNS C67400
Available Properties
  • Specific Gravity
  • Density
  • Hardness, Brinell, 3000 kg
  • Tensile Strength, Ultimate
  • Tensile Strength, Yield
  • Elongation at Break
  • Modulus of Elasticity
  • Modulus of Rigidity
  • Poissons Ratio, Calculated
  • CTE, linear
  • Specific Heat Capacity
  • Thermal Conductivity
  • Aluminum, Al
  • Copper, Cu
  • Lead, Pb
  • Manganese, Mn
  • Silicon, Si
  • Zinc, Zn
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