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槽钢是截面为凹槽形的长条钢材，属建造用和机械用碳素结构钢，是复杂断面的型钢钢材，其断面形状为凹槽形。槽钢主要用于建筑结构、

幕墙工程、机械设备和车辆制造等。中国槽钢的进口量大于出口量。主要产地是唐钢、包钢、山钢、黄特、马钢、宣钢、日钢等几家钢厂。

槽钢的交货长度分定尺、倍尺二种，并在相应的标准中规定允差值。国产槽钢的长度选择范围根据规格号不同分为5 ―12m 、5 ―19m 、

6 ―19m 三种。进口槽钢的长度选择范围一般为6 ―15m 。

Trough steel is a long steel of groove shape, which belongs to carbon structure steel for construction and machinery. It is a section steel with complex section,

and its section shape is groove shape. Trough steel is mainly used in building structure, curtain wall engineering,

mechanical equipment and vehicle manufacturing. China's trough steel imports are more abundant than its exports. The main producing areas are tang steel,

Baotou steel, mountain steel, Huangte, Masteel, Xuan steel, Japan steel and other steel mills. The delivery length of groove steel is divided into two types:

fixed ruler and double, and the tolerance value is specified in the corresponding standard.

The selection range of the length of domestic groove steel is divided into 5-12m, 5-19m and 6-19m according to different specification numbers.

The length selection range of the inlet groove steel is generally 6- -15m.