1980～1990年以来,小汽车材料的构成变化为:钢材降低了2％左右,但现在仍占统治地位,低碳钢为46.0％,合金钢为8.0％;聚合材料增加了3％,1990年为9.0％;汽车发动机和底座改用铝代替生铁后(在新型Roves 200小汽车上,采用了全铝的K系发动机)铸铁从14％降低到8％。 1990年小汽车材料的典型构成列于下表。 Since 1980-1990, the material composition of the car has been changed as follows: the steel material has been reduced by about 2%, but it still occupies the dominant position, with 46.0% for mild steel and 8.0% for alloy steel; 3% for polymeric material, 1990 (9.0%). After replacing the engine and base with aluminum instead of pig iron (all-aluminum K-series engines were used on the new Roves 200) cast iron was reduced from 14% to 8%. The typical car materials for 1990 are listed in the table below.