There are four broad classifications of steel: carbon steels, alloy steels, high-strength low-alloy steels and stainless steels.
钢材大致可分为四类：炭素钢，合金钢，高强度低合金钢和不锈钢。
There are four broad classifications of steel : carbon steels, alloy steels, high-strength low-alloy steels and stainless steels.
钢材大致辞可分为四类，即：碳素钢、合金钢、高强度低合金钢和不锈钢。
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