H型钢，是一种截面面积分配更加优化、强重比更加合理的经济断面型材，因其断面与英文字母“H”相同而得名。H型钢的两条外边内侧没有斜度，是平直的。这使得H型钢的焊接拼接比工字钢操作简单，单位重量的力学性能更好，可以节省大量的材料和施工时间。
H steel is a more efficient and economical section with high section area distribution, because its section is the same as the English letter "H". The two sides of the H type steel h***e no slope inside the inner side, and they are straight. This makes the welding and splicing of H steel simpler than I-steel, better mechanical properties per unit weight, and can s***e a lot of material and ctruction time.
普通工字钢和轻型工字钢的型号是用其腰高厘米数的阿拉伯数字来表示，腹板、翼缘厚度和翼缘宽度不同其规格以腰高×腿宽(b)×腰厚(d)的毫数表示，如“普工160×88×6”。
The ordinary beam and light I-beam model is the digital Arabia with its waist high cm number to represent, web and flange thickness and flange width of different specificati to the waist high (H) * (b) * waist leg width thickness (d). The number of said, such as "general 160 x 88 x 6"
槽钢的原料钢坯为含碳量不超过0.25%的碳结钢或低合金钢钢坯。成品槽钢经热加工成形、正火或热轧状态交货。其规格以腰高*腿宽(b)*腰厚(d)的毫米数表示，如150*78*9。
The raw billet of the channel steel is a carbon steel or low alloy steel billet containing less than 0.25% carbon content. The finished channel steel is delivered by hot forming, normalizing or hot rolling. Its specificati are represented by the millimeter number of waist height (H) * leg width (b) * waist thickness (d), such as 150*78*9.
合金元素与铁、碳的相互作用
合金元素加入钢中后，主要以三种形式存在钢中。即：与铁形成固溶体；与碳形成碳化物；在高合金钢中还可能形成金属间化合物。
The interaction of alloying elements with iron and carbon
When alloy elements are added to steel, they mainly exist in three forms. Namely: to form a solid solution with iron; carbide and carbon; in high alloy steels are also likely to form intermetallic compounds.