Why screw steel, wire rod is Chinese unique, no outside?
Screw steel, wire is not unique because Chinese, outside because the iron and steel industry is a sunset industry in Europe and other developed countries, new homes a year throughout Europe starts is not a city of Beijing. Rebar and wire rod were officially listed on the Shanghai stock exchange in March 27th 09.
Steel is known as hot rolled ribbed bar. Ordinary hot rolled steel bars are made up of HRB and the minimum yield point of the brand. H, R, and B are the first letters in English for hot-rolled (Hotrolled), ribbed (Ribbed) and reinforced (Bars) three words. Hot rolled ribbed bar is divided into two levels, HRB335 (old No. 20MnSi), three HRB400 (20MnSiV, 20MnSiNb, old No. 20Mnti), four grade HRB500 three grade.
Wire rod refers to the hot-rolled steel bar of 5-22mm diameter or the special-shaped steel of this section. As a result of wire rod delivery, it is also known as wire rod. The wire rod cross section perimeter is very small, the common product specification diameter is 5-13mm. According to the different rolling mills can be divided into high-speed wire (high wire) and ordinary wire (PU line) two.
