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Nominal composition:
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| Aluminium |
(Al) |
7% |
| Silicon |
(Si) |
2% |
| Copper |
(Cu) |
91% |
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Description
A wrought aluminum-silicon-copper alloy used for valve seats and stems, marine hardware, pole line hardware, bushings and bearings, cams, bolts and nuts, valve bodies and similar components.
AMPCO® 642 alloy has excellent capacity for hot forming, with a hot forgeability rating of 80 and a machinability rating of 60.
Joining, using the brazing and arc welding methods, is only fair. Soldering and oxyacetylene welding are not recommended.
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