不同于普通工字型的是H型鋼的翼緣進(jìn)行了加寬，且內(nèi)、外表面通常是平行的，這樣可便于用高強(qiáng)度螺栓和其他構(gòu)件連接。其尺寸構(gòu)成合理系列，型號(hào)齊全，便于設(shè)計(jì)選用。（除了吊車梁用工字型鋼）。

Unlike the ordinary I-type, the flange of H steel is widened, and the inner and outer surfaces are usually parallel, so that it can be easily connected with high-strength bolts and other components. Its size is a reasonable series, and the model is complete, which is convenient for the design. (except for crane girder with I-type steel)

工字鋼的邊長(zhǎng)小，高度大，只能承受單方向的力。  H型鋼槽深，厚度大，可以承受兩個(gè)方向的力。

工字鋼只能用于橫梁，而H型鋼才能用于結(jié)構(gòu)的承重柱。

The length of the I-steel is small and high. It can only bear the force of the single direction. The H steel groove is deep and thick, and can bear the force of two directi.

I-steel can only be used for crossbeams, and H steel can be used for structure bearing columns.

合金元素與鐵、碳的相互作用

合金元素加入鋼中后，主要以三種形式存在鋼中。即：與鐵形成固溶體；與碳形成碳化物；在高合金鋼中還可能形成金屬間化合物。

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.