最近 ,美国某公司研究了一种铝合金 ,可用于制造汽车管材、热交换器和空气冷却器 ,其专利号为 =US6 15 30 2 5—A。这种合金具有高的抗腐蚀性、高的拉伸强度和很好的可挤压性。这种合金的成分 (质量百分数 )为 :0 0 6 %～ 0 2 5 %的铁 ,0 0 5 %～ 0 15 %的硅 ,含有高于 0 Recently, a U.S. company has investigated an aluminum alloy that can be used to make automotive tubing, heat exchangers, and air coolers. The patent number is US6153025-A. This alloy has high corrosion resistance, high tensile strength and good extrudability. The composition of the alloy (mass percentage) is: 0 0 6% ~ 0 25% iron, 0 0 5% ~ 0 15% silicon, containing more than 0