由于钢材中所含的元素种类和含量的不同，钢材的也有多种分类。今天济钢一级代理商小编就给大家介绍一下钢材的分类以及用途。
Because of the differences in the kinds and content of elements in steel, there are many kinds of steels. Today, Jinan Iron and steel agents at small level, I would like to introduce the classification and use of steel.

1、螺纹钢：
1. Thread steel:
螺纹钢的规格范围一般在6-50mm，我们平时涉及及较多的是8mm、10mm、12mm、14mm、16mm、18mm、20mm、22mm、25mm、28mm、32mm、36mm、40mm等。国家允许的偏差：6-12mm偏差在±7%，14-20mm偏差在±5%，22-50mm偏差在±4%。螺纹钢一般定长9m、12m，其中9m长螺纹主要用于正常的道路建设，12m长螺纹主要用于桥梁建设。
Thread steel specifications range is generally in 6-50mm, we usually involve more and more are 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 32mm, 36mm, 40mm and so on. Deviation allowed by country: 6-12mm deviation is + 7%, 14-20mm deviation is + 5%, and 22-50mm deviation is + 4%. Thread steel generally fixed length 9m and 12M, in which 9m long thread is mainly used for normal road construction, 12m long thread is mainly used for bridge construction.
2、线材：
2, wire:
平时涉及较多的规格为6.5mm、8.0mm、10mm；此外还有5.5mm、6.0mm、7.0mm等等。目前我国生产的盘条最大直径可达到30mm。另线材生产一般允许公差在±0.4mm。线材常见牌号一般分Q195、Q215、Q235三种。线材按轧制速度可分为：普线、高线和准高线
Usually involves more specifications for 6.5mm, 8.0mm, 10mm, in addition to 5.5mm, 6.0mm, 7.0mm, and so on. At present, the biggest diameter of wire rod produced in our country can reach 30mm. The allowable tolerance of other wire rod production is at + 0.4mm. The common grades of wire rod are generally divided into three kinds: Q195, Q215 and Q235. According to the rolling speed, the wire rod can be divided into general line, high speed line and quasi high wire line
3、盘螺：
3, disk:
建筑用钢材，顾名思义就是像线材一样盘在一起的螺纹钢，一般市面上的就是6.5-8.0-10-12-14的居多。
Construction steel, as its name suggests, is like wire rod disk steel together, the general market is the majority of 6.5-8.0-10-12-14.
4、圆钢：
4, round bar:
圆钢圆钢是指截面为圆形的实心长条钢材。其规格以直径的毫米数表示，如“ 50”即表示直径为 50毫米的圆钢。
Round bar or round bar refers to a solid strip of steel with a round section. The specifications are expressed in millimeters of diameter, such as "50", which means a round bar of 50 millimeters in diameter.
圆钢分为热轧、锻制和冷拉三种。热轧圆钢的规格为5.5-250毫米。其中：5.5-25毫米的小圆钢大多以直条成捆供应，常用作钢筋、螺栓及各种机械零件；大于25毫米的圆钢，主要用于制造机械零件或作无缝钢管坯。
Round bar is divided into three parts: hot rolling, forging and cold drawing. Standard Specification for hot rolled round steel is 5.5-250 mm. Of them: 5.5-25 mm small round bars are mostly supplied by straight strips. They are used as reinforcing bars, bolts and various mechanical parts. They are more than 25 millimeters of round steel. They are mainly used in the manufacture of mechanical parts or seamless steel tube billets.
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