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角钢俗称角铁，是两边互相垂直成角形的长条钢材。有等边角钢和不等边角钢之分。等边角钢的两个边宽相等。其规格以边宽× 边宽×边厚的毫米

数表示。如“∠30×30×3”，即表示边宽为30毫米边厚为3毫米的等边角钢。也可用型号表示，型号是边宽的厘米数，如∠3#。型号不表示同一型号

中不同边角铁厚的尺寸，因而在合同等单据上将角钢的边宽、边厚尺寸填写齐全，避免单独用型号表示。热轧等边角钢的规格为2#-20#。角钢可按

结构的不同需要组成各种不同的受力构 件，也可作构件之间的连接件。 

Angle steel, commonly known as corner iron, is both sides of the vertical angular shape of the long steel.There are equal corner steel and unequal corner steel.

The two sides of equal marginal steel have equal width.The specifications are expressed as the number of mm of edge wide edge wide edge thickness.

For example, "30303", it indicates an equal edge angle steel with an edge width of 30 mm and an edge thickness of 3 mm.It can also be expressed as the model,

the model is the number of centimeters edge wide, such as 3 #.The model does not indicate the dimensions of different angle iron thickness in the same model,

so the edge width and thickness of angle steel are fully filled in the contract and other documents, to avoid using the model separately.The specification of

hot rolled steel is 2 # -20 #.Angle steel can be composed of different stressed components according to the different needs of the structure, or as a connection component between the components.