Q: Are there different classifications for the cold drawing process of cold drawn square steel?
A:The cold drawing process of cold drawn square steel has different classifications. Specifically, when cold drawing is only controlled by the cold drawing rate or cold drawing stress, it is a single control, and the two are performed simultaneously. Is for dual control . Moreover, it must be known that if it is a cold drawing of prestressed steel bars, dual control should be used, which is better.
Q: How do I know if the drawing is cold drawn or hot rolled? And the classification of cold drawn square steel for structure, which standard should be referred to?
答：对于问题一，一般来讲，如果是没有说明的，是为热轧方钢，有说明的，则是冷拉方钢。如果，还有不懂的话，还可以查阅五金手册。至于，结构用冷拉方钢，在分类上的参考标准，是为《GB/T 3078-2008 优质结构钢冷拉钢材》这一个。
Answer: For question one, in general, if there is no description, it is hot-rolled square steel, and if there is a description, it is cold drawn square steel. If you still don't understand, you can also refer to the hardware manual. As for the cold drawn square steel for structural use, the reference standard for classification is "GB / T 3078-2008 High Quality Structural Steel Cold Drawn Steel".
Q: If the cold drawn square steel is broken or broken during use, what is the root cause?
A: If the cold drawn square steel breaks or breaks during use, the root cause is that there is a problem with the raw materials used in the cold drawn square steel, for example, there are too many impurities in the raw material. At this time, the material is cold drawn. If so, then there will be fractures.