Alu­minium al­loy grades

Practical Boat Owner - - Practical -

Both USA (ASTM) and UK (BS) stan­dards des­ig­nate cast grades con­sist­ing of three dig­its. Con­fus­ingly, in the UK many sup­pli­ers still use the old BS 1490:1988 des­ig­na­tion that has the form LM 2, LM 6, etc.

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