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不同于普通工字型的是H型钢的翼缘进行了加宽，且内、外表面通常是平行的，这样可便于用高强度螺栓和其他构件连接。其尺寸构成合理系列，型号齐全，便于设计选用。（除了吊车梁用工字型钢）。

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)

H型钢是一种断面力学性能较工字钢优良的经济型断面钢材，因其断面的形状与英文字母“H”相同而得名。热轧H型钢的翼缘比工字钢宽、侧向刚度大、抗弯能力强。同等规格下H型钢理重较工字钢轻。

H steel is a kind of economical section steel with better section mechanical properties than that of I-steel. Because the shape of the section is the same as that of the English letter "H". The flange of hot rolled H steel is wider than that of I-steel, large lateral stiffness and strong bending resistance. Under the same specification, the weight of H steel is lighter than that of I-steel.

型材是铁或钢以及具有一定强度和韧性的材料通过轧制、挤出、铸造等工艺制成的具有一定几何形状的物体。这类材料具有的外观尺寸一定，断面呈一定形状，具有一定的力学物理性能。Thewidthofthethinplateis500~1500mm,andthethicknessis600~3000mm。型材既能单独使用也能进一步加工成其他制造品，常用于建筑结构与制造安装。型材的材质、规格尺寸等可参照相应的***标准。轧机结构和轧机布置形式较多。在结构形式上有二辊式轧机、三辊式轧机、孔型轧机、多辊孔型轧机、Y型轧机、45°轧机和悬臂式轧机等。

厚钢板的钢种大体上和薄钢板相同。在品各方面，除了桥梁钢板、锅炉钢板、汽车制造钢板、压力容器钢板和多层高压容器钢板等品种纯属厚板外，有些品种的钢板如汽车大梁钢板（厚2.5~10毫米）

The steel of a thick steel plate is roughly the same as that of a thin steel plate. In all aspects, in addition to bridge steel plate, boiler steel plate, automobile made steel plate, pressure vessel steel plate and multilayer high pressure vessel steel plate, some varieties of steel plate such as car beam steel plate (2.5~10 mm thick)