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FINE GRAIN COPPER ALLOYS

Modern continuous casting techniques allow for a fine grain alloy structure and reduced segregation, thereby greatly improving casting strength. Fine grain copper alloys, developed for nuclear and aerospace uses, are now available for commercial applications.

The fine grain continuous cast process offers many advantages over conventional cast products. The extreme fineness and uniformity of the cast structure permits more severe forming and machining operations. Fine grain continuous cast bars and tubes are easier to micro finish and results in longer life for bearings, gears and other copper alloy parts.

 bright10.gif (83 bytes) Enhanced mechanical properties bright10.gif (83 bytes) Product consistency
 bright10.gif (83 bytes) Easier to machine bright10.gif (83 bytes) Consistent dispersion of elements
 bright10.gif (83 bytes) Enhanced corrosion resistance bright10.gif (83 bytes) Better response to heat treatment

Typical continuous cast cross section

Fine Grain continuous cast cross section

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Typical continuous cast longitudinal cross section

Fine Grain continuous cast longitudinal cross section

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When fine grain continuous cast bars and tubes are specified, engineers, buyers and producers are asking for, and getting, the best cast structure available.

Alloy Type Casting Tensile Strength psi Yield Strength psi Elongation % in 2" Impact Strength Ft. Lb. Brinell Hardness
C92900

Fine grain

59,000 38,500 14 28 117
  Continuous cast 51,500 29,000 18 25 92
  Permanent mold 51,000 26,500 14 20.2 83
  Sand cast 48,400 21,600 42 8.7 63
C83600

Fine grain

44,500 23,900 32 20 75
  Continuous cast 42,000 21,400 28 15 72
  Permanent mold 41,200 19,500 24 13.5 65
  Sand cast 36,400 16,900 35 12 49
C93200

Fine grain

45,500 27,600 21 12.5 77
  Continuous cast 44,000 24,000 16 11 72
  Permanent mold 41,600 21,900 18 11 69
  Sand cast 40,400 19,500 39 9.3 65
C94100

Fine grain

31,300 18,600 26 7 60
  Continuous cast 28,700 18,300 8 6 57
  Permanent mold 28,500 18,200 12 5.3 53
  Sand cast 26,900 15,800 17 5.5 45
             

Although the fine grain improvement applies to any cast metal, Anchor Bronze & Metals, Inc. specializes in copper alloys, bearing bronze, aluminum bronze, manganese bronze and high strength spinodal copper alloys.