Usage Details sales Q345 low-alloy structural steel low alloy steel grades of low-alloy structural steel

Low alloy structural steel is added in small or micro alloying elements of ordinary carbon steel, the total content of no more than 5%, leaving the steel performance changes give more excellent properties than carbon steel, such as strength high, also with wear, corrosion resistance, high temperature, low temperature and other special properties. Because small amount of alloying elements added in this steel, these are low-alloy steel. It includes welding low alloy high strength low alloy structural steel, low alloy weathering steel, low alloy steel, low alloy steel railroad, mining and other low-alloy steel with low alloy steel. High strength low alloy steel (GB / T1591-1994), in addition to such steels contain 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, which grades the Q295A, B, Q345A, B, C, D, E, Q390A, B, C, D, E, Q420A, B, C, D, E, Q460C, D, E, etc. grade, said its same meaning as carbon steel. V, Nb, Ti, Al and other refined grains trace elements, in addition to such steels A, B grade steel, and its C, D, E grade steel should contain at least one of them; in order to improve the properties of steel , A, B grade steel also can 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 the representative of such steel grades, where A, B grade steel commonly referred 16Mn; C above the level of steel need to add one or more trace elements, which increase the mechanical properties of a low-temperature impact properties. Such 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 major building structures. I uphold the company "with a good reputation, based on the long-term development," the purpose of wholeheartedly welcome new and old friends to visit my company business negotiations, cooperation and win-win!