AlMg3Mn¾T´Î AlMg3Mn¾TªO AlMg3Mn¾TºÞ AlMg3Mn¾T½u AlMg3Mn¾T±a AlMg3Mn¾T¿õ
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Si:0.25
Fe:0.40
Cu:0.10
Mn:0.50~1.0
Mg:2.4~3.0
Cr:0.05~0.20
Zn:0.25
Ti:0.20
Al:Êe¶q