AJ alloys

AJ alloys (AJ52 and AJ62) are die castable alloys of magnesium that have good creep resistance at high temperature. They contains magnesium, aluminum, and strontium. In the names the `J` refers to Strontium. AJ52 has higher creep resistance, and AJ62 has better castability. Both are used in the BMW magnesium–aluminum composite engine block. ...
Found on http://en.wikipedia.org/wiki/AJ_alloys
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