Angle steel is mainly divided into two types: equilateral angle steel and unequal angle steel. Among them, unequal angle steel can be divided into two types: unequal sides and equal thickness and unequal thickness. The delivery length of angle steel is divided into two types: fixed length and double length. The fixed length selection range of angle steel has four ranges: 3-9m, 4-12m, 4-19m, and 6-19m according to different specifications.

Unequal angle steel refers to steel with an angular cross-section and unequal lengths on both sides. It is a type of angle steel. Its side length ranges from 25mm×16mm to 200mm×125mm. Generally, the unequal angle steel specifications are ∟50*32--∟200*125; the thickness is 4-18m.

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