Construction steel refers to a kind of steel which is specially used in the construction industry and participates in the construction. In the construction industry, steel bar, steel pipe and other construction steel are the most common. Steel bar is an indispensable framework for the construction of concrete, and steel pipe is an important role in the construction of scaffolding and other worker operating sites. Construction steel products in the market are also classified into grades and varieties, today we will mainly introduce the classification of construction steel grades according to processing methods.

　　按加工辦法對鋼筋停止等級劃分，則可分為熱軋鋼筋、熱處置鋼筋、冷拉鋼筋、冷拔低碳鋼絲和鋼絞線管五個品種。

　　According to the processing method, the steel bar stopping grade can be divided into five varieties: hot-rolled steel bar, heat treatment steel bar, cold-drawn steel bar, cold-drawn low carbon steel wire and stranded steel pipe.

　　熱軋鋼筋是經過熱軋處置后自然冷卻的一種鋼筋，由低碳鋼和普通合金鋼構成，且處于高溫狀態下扎支撐，是鋼筋混凝土和預應力混泥土構造的主要的配筋，同時也是土木建筑工程中常用的廢品鋼筋。

　　Hot-rolled steel bar is a kind of steel bar which is naturally cooled after hot-rolling disposal. It is composed of low carbon steel and common alloy steel, and is tied and supported at high temperature. It is the most important reinforcement for reinforced concrete and prestressing concrete structure, and is also the most commonly used waste steel bar in civil engineering.

　　熱軋的帶筋鋼筋經淬火和高溫回火調質處置而成的就是熱處置鋼筋；冷拉鋼筋則是在常溫狀態下對鋼筋停止一定的拉伸而成的；經過拔制產生冷加工硬化的低碳鋼絲就是冷拔低碳鋼絲。而鋼絞線管則是多根鋼絲絞合而成的鋼絲制品。

　　Hot-rolled steel bars are treated by quenching and tempering at high temperature to form heat-treated steel bars; cold-drawn steel bars are made by stopping certain stretching at room temperature; cold-drawn low-carbon steel wires are cold-drawn low-carbon steel wires that produce cold-worked hardening after drawing. The stranded pipe is a steel wire product which is made up of several steel wires.

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