Specification for hexagonal bars for nuts, couplings and hollow machined parts of aluminium-copper-magnesium-silicon-manganese alloy (solution treated and precipitation treated) (free from peripheral and asymmetric coarse grain) (not less than 14 mm nor more than 36 mm across flats) (Cu 4.4, Mg 0.5, Si 0.7, Mn 0.8)
铝-铜-镁-硅-锰合金(固溶处理和沉淀处理)螺母、联轴器和空心机加工零件用六角棒规范(无周边和不对称粗晶)(平面宽度不小于14 mm 也不大于36 mm)(Cu 4.4 Mg 0.5