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低合金钢是在碳素钢基础上加入少量合金元素(总量不超过3～5％)的钢,它在满足塑性、韧性、工艺性能及其它特殊性能要求的条件下,具有较高的强度和良好的综合性能。用低合金钢代替碳素钢在各种建筑结构中使用可节约金属10～30％。生产低合金钢具有工艺简单,性能好,成本提高不多等特点,因此,大量生产低合金钢是目前世界
Low-alloy steel is a kind of steel with a small amount of alloying elements added on the basis of carbon steel (the total amount does not exceed 3 to 5%), and has the advantages of high strength under the conditions of plasticity, toughness, process performance and other special performance requirements And good overall performance. The use of low-alloy steel instead of carbon steel can be used in a variety of building structures can save 10 to 30% of the metal. The production of low-alloy steel has the advantages of simple process, good performance and little cost increase. Therefore, mass production of low alloy steel is the current world