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美国专利US200831768中公布了一种适于制造无衬套发动机汽缸体的铸造Al—Si合金。该合金主要合金成分的质量分数为:13%~14%Si,2.3%~2.7%Cu,0.1%-0.4%Fe,0.1%~0.45%Mn,0.1%-0.3%Mg,0.1%-0.6%Zn,0.05%~0.11%Ti,0.4%~0.8%Ni,0.01%~0.09%Sr,其余是Al和少量杂质。在该合金中,原生Si颗粒呈均匀分布,合金在凝固和冷却过程中也不发生Cu元素的偏析。