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Raw material market analysis

Views: 6     Author: Site Editor     Publish Time: 2021-05-21      Origin: Site

How is the construction steel classified?What are they used for?

In this rapidly developing society, high-rise buildings rise from the ground, steel structure can be seen everywhere, but we know that different steel has different uses, steel is also divided into many kinds.Here is to introduce to you the classification of construction steel and their respective uses, do not know what friends do not miss Oh!

 Construction steels are mainly extracted from ferrous metal materials. Most of China's construction steels are low carbon steels, medium carbon steels and low alloy steels produced by rimming steel or killed steel process, among which semi-killed steel has been popularized and used in China.

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The types of construction steel products are generally divided into rebar, round steel, wire rod, coil screw and other categories.

 1. Rebar

The general length of rebar is 9m, 12m, 9m long thread is mainly used for road construction, 12m long thread is mainly used for bridge construction.The specification range of the thread is generally 6-50mm, the country allows deviation.There are three types of rebar HRB335, HRB400 and HRB500 according to the strength.

2. Round steel

As the name suggests, round steel is a solid strip of steel with a circular section, divided into hot rolled, forged and cold drawn three kinds.There are many materials of round steel, such as: 10#, 20#, 45#, Q215-235, 42CrMo, 40CrNiMo, GCr15, 3Cr2W8V, 20CrMnTi, 5CrMnMo, 304, 316, 20Cr, 40Cr, 20CrMo, 35CrMo and so on.

Hot rolled round steels are 5.5-250mm in size and 5.5-25mm are small round steels supplied in straight strips and used for rebars, bolts and various machine parts.Round steel larger than 25 mm, used chiefly in the manufacture of machine parts or for seamless steel tube billets.

 3. Wire

Wire common types of Q195, Q215, Q235 three kinds, but the construction steel rod with only Q215, Q235 two kinds, generally often used specifications have diameter 6.5mm, diameter 8.0mm, diameter 10mm, currently China's largest rod can reach the diameter of 30mm.In addition to being used as reinforcement for building reinforced concrete, wire can also be used for wire drawing and net wire.

4. Set screw

Coiled screw is the rebar that coils together like wire, belong to a kind of steel that building uses.Rebar is widely used in a variety of building structures, the advantages of screw compared with the steel is: only 9-12 screw, screw can be arbitrarily cut according to the use of the need.

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