16 Mn seamless _ _ virtue seamless tube industry

Special steel pipe 16mn use for the bridge as "16Mnq", a special steel automobile frames as "16MnL", special steel pressure vessel is "16MnR". Standard GB / T8162-2008 (structural) GB / T8163-2008 (transmission fluid with) GB6479-2008 (high pressure chemical fertilizer equipment, seamless steel pipe) 16Mn Steel weight calculation formula: [(OD - Wall Thickness) * Thickness] * 0.02466 = kg / m (weight per meter) This adjustment is to rely on the carbon steel (C) amount to improve the mechanical properties of the steel, and therefore, according to the level of the carbon content, such steels can be divided into: a low-carbon steel - generally less than 0.25% carbon content, such as 10, 20 steel; medium carbon steel - carbon content is generally between 0.25 to 0.60% manganese 16 thick-walled seamless tube, such as 35, 45 steel; High carbon - carbon content is generally greater than 0.60%. Such steel is generally not used to make steel. Knowledge presentation straight seam steel 16Mn due to the low carbon content, hardened 16 Mn tends to reduce the Tianjin Seamless, cold crack tends to decrease. But as the intensity level increases, the thickness increase, still has a certain tendency to cold cracking. Because often using cellulose electrodes, self-shielded flux cored wire and other high hydrogen content of welding consumables, line energy is small, the cooling speed, will increase the sensitivity to cold cracking, need to be taken in the field of welding welding necessary measures, such as welding before preheating. HAZ embrittlement is often caused by broken straight seam steel 16Mn, induced root cause of catastrophic accidents. Partial embrittlement has two main areas, namely the heat affected zone embrittlement CGHAZ Shandong Q345B seamless pipe is due to over-grown grains overheated zone and the formation of undesirable tissue caused by the multi-layer welding CGHAZ another critical embrittlement seamless, namely CGHAZ again before the weld by heating the two-phase region due to the subsequent bead. This is done by adding a certain amount in the steel Ti, Nb micro alloying elements and control weld cooling rate to obtain a suitable t8 / 5 to improve toughness. With 16Mn straight seam steel pipe to reduce the carbon content of weld less sensitive to hydrogen induced cracking, in order to avoid cracking process measures needed to reduce, reduce the performance of the extent of damage the weld heat affected zone. However, due to the welding straight seam steel 16Mn through a series of complex non-equilibrium physical and chemical processes, which may cause defects in the weld zone, or the joint performance degradation, mainly weld cracking problems and HAZ embrittlement problem. 16 Mn seamless seamless _ _ virtue Pipe Co., Ltd. Liaocheng by virtue of Industry. Liaocheng virtue Pipe Co., Ltd. (www.meidegc.com) (www.meidegc.com) (www.mdwfg.com) (www.mdggc.com) strong, credible, Liaocheng in Shandong steel industry has accumulated a a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead virtue of Industry and you work into the brilliant, for a better future!