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C86500
C86500
UNS C86500 (standardized under ASTM B505 / ASTM B505M for continuous casting, ASTM B584 for sand castings, and ASTM B271 for centrifugal castings, historically cataloged as SAE 43 or Alloy 865) is a high-strength cast copper-zinc alloy known industrially as No.1 Manganese Bronze (or High-Strength Yellow Brass).Despite its traditional commercial name of "Bronze", C86500 is metallurgically a duplex (α + β) cast brass formulated with 55.0% to 60.0% copper and balanced with zinc. It is strengthened through solid-solution and grain-refining additions of Iron (0.40% - 2.00%), Aluminum (0.50% - 1.50%), and Manganese (0.10% - 1.50%). This alloy provides high tensile strength, load-bearing capacity, and resistance to saltwater corrosion without requiring heat treatment.
Typical Uses | |
| Automotive | Weld Guns |
| Builders Hardware | Brackets |
| Electrical | Electrical Hardware |
| Industrial | Compressors, Forming Dies for Wood Pulp Industry, Frames, Gears, Hooks, Lever Arms, Machinery, Machinery Parts (Substituted for Steel and Malleable Iron), Machinery Parts requiring High Strength, Pressing Dies for Wood Pulp, Struts, Wear Rings for Pressing Dies for Wood Pulp Industry. |
| Marine | Boat Parts, Clamps, Covers for Marine Hardware, Propellers for salt and fresh water, Rudders. |
Chemical Composition:
Element |
Copper |
Aluminium |
Iron |
Nickel |
Manganese |
Zinc |
Lead |
Tin |
| Min (%) | 55.00 |
0.50 |
0.40 |
– |
1.10 |
36.00 |
– |
– |
| Max (%) | 60.00 |
1.50 |
2.00 |
1.00 |
1.50 |
42.00 |
0.40 |
1.00 |
Fabrication Properties
Soldering |
Brazing |
Machinibility Rating |
|---|---|---|
Fair |
Fair |
26 |
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