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Aluminum For Diecasting
Aluminum (Al) die casting alloys have a specific gravity of approximately 2.7 g/cc, placing them among the lightweight structural metals. The majority of die castings produced worldwide are made from aluminum alloys. Alloy 380 is by far the most widely cast of the aluminum die casting alloys, offering the best combination of material properties and ease of production. It may be specified for most product applications including electronic and communications equipment, automotive components, engine brackets, transmission and gear cases, appliances, lawn mower housings, furniture components, hand and power tools.
Alloy 360 offers higher corrosion resistance, superior strength at elevated temperatures, and somewhat better ductility, but is more difficult to cast.
Alloy 390 was developed for automotive engine blocks. Its resistance to wear is excellent, and its ductility is low. 390 also has the greatest castability of all aluminum alloys. Its current uses include die cast valve bodies and compressor housings in pistons.
Alloy 369, like 390, offers increased wear resistance, but it is not quite as abrasive or as fluid as 390, making it easier on machine tools. In many applications requiring heavy machining, 369 can be used as a cost-saving substitute for 390.
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