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Nominal composition:
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|
|
|
|
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| Aluminium |
(Al) |
13.1% |
| Iron |
(Fe) |
4.4% |
| Manganese |
(Mn) |
2.0% |
| Others |
|
max. 0.5% |
| Copper |
(Cu) |
balance |
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The increase in the Al and Fe content results in a material in which the hard gamma 2 phase (about
400 HB) is present.
By proper metallurgical control this hard constituent is uniformly distributed giving this alloy its ability
to
resist wear.
Application
AMPCO® 21 is used for guide port bushings and wear strips replacing hardened steel and for some
cams when no impact is involved. However, the largest single use is as die rings, inserts, forming
rolls etc. in forming, bending or drawing operations, especially when stainless steel is the material
being processed.
This material is also widely used as work support blades for the centreless grinding of steel rods.
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