铝合金 挤压型材（6056-T4511） 化学成分：1.0Si 0.90Mg 0.80Cu 0.60Mn 0.40Zn 经固溶热处理并通过拉伸应力消除

This specification covers an aluminum alloy procured in the form of extruded profiles (shapes) with nominal thickness of over 0.040 to 0.375 inch (over 1.00 to 9.5 mm), inclusive, and cross sections up to 7.75 square inches (5000 mm 2x) and circle sizes as indicated (see 8.5 ).