PRODUCT

Such structures generally consists of a converter or an open hearth steel smelting, its main raw material for iron scrap steel, steel, sulfur, phosphorus content is higher than high-quality carbon structural steel, general sulfur ≤0.050%, phosphorus ≤0.045%. Raw materials into steel by the other alloying elements such as chromium, nickel, copper generally not more than 0.30%, according to the composition and performance requirements, such structural steel grades by the Q195, Q215A, B, Q235A, B, C, D , Q255A, B, Q275 and other steel-level representation.

NOTE: "Q" is the yield of "Qu" Hanyu Pinyin word uppercase first, followed by numbers that grade minimum yield point (σs) value, followed by the symbol in accordance with the steel impurity element (sulfur, phosphorus) at levels ranging from high to low and accompanied by changes in carbon, manganese is divided into a, B, C, D four and so on.
Such structures biggest steel production, very versatile, and more rolled into sheet, profiles (round, square, flat, engineering, tank, angle, etc.) and profiles as well as the manufacture of welded steel pipe. Mainly used for factories, bridges, ships and other structures and general transmission fluid pipes. Such steel is generally used directly without heat treatment.

High strength low alloy structural steel (GB / T8162-2008)

Such structural steel, in addition to a certain amount of silicon or manganese basic elements, but also contain other elements suitable for our resource situation. Such as vanadium (V), niobium (Nb), titanium (Ti), aluminum (Al), molybdenum (Mo), nitrogen (N), and rare earth (RE) and other trace elements. According to the chemical composition and performance requirements, the grade by the Q295A, B, Q345A, B, C, D, E, Q390A, B, C, D, E, Q420A, B, C, D, E, Q460C, D, E, etc. grade steel, said its same meaning as carbon structural steel.

V, Nb, Ti, Al and other trace elements grain refinement, in such a structure, in addition to steel A, B grade steel, its C, D, E grade steel should contain at least one of them; in order to improve the steel performance, a, B grade steel can also be added to one of them. Further, Cr steel such, Ni, Cu residual element content of not more than 0.30% each. Q345A, B, C, D, E is representative of such steel grades, where A, B grade steel is usually called 16Mn; C above the level of structural steel required to join one or more trace elements, which increase the mechanical properties of a low temperature impact properties.

Such structural steel with carbon steel ratio. High strength, good overall performance, long life, wide range of applications, more economical advantages. The multi-rolled steel sheet, profiles, seamless steel tubes, etc., are widely used in bridges, ships, boilers, vehicles and important architectural structures.