16MnG steel high pressure boiler tube is low alloy high strength structural steel (GB/T1591-1994), in addition to a certain amount of silicon or manganese elements, 16MnG steel also contains other 16Mn high pressure boiler tubes suitable for our country.
Elements of the 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, its brand by Q295A, B, Q345A, B, C, D, E, Q390A, B, C, D, E, Q420A, B, C, D, E, Q460C, E, D, and other steel grades, which means the same as carbon structural steel.
V, Nb, Ti, Al and other trace elements in grain refinement, 16MnG steel this kind of steel in addition to A, B steel, C, D, E grade steel should be at least contains one of the species; in order to improve the performance of the steel, a A and B grade steel can also join them. In addition, the content of residual elements of Cr, Ni and Cu in these steels is not greater than 0.30%. Q345A, B, C, D and E are representative grades of this kind of steel. Among 16MnG steel, A and B grade steels are usually called 16Mn. More than one trace element is added to steel at grade C or above, and 1 cryogenic impact properties are added to the mechanical properties.
Characteristic:
16MnG steel this kind of steel is better than carbon structural steel. The utility model has the advantages of high strength, good comprehensive performance, long service life, wide application range, relatively economic, etc. 16MnG steel is widely used in bridges, ships, boilers, vehicles and important building structures.
16MnG steel Specifications and appearance quality: GB5310-95 "seamless steel tubes for high-pressure boilers". The outer diameter of hot rolled pipes is 22~530mm, and the wall thickness is 20~70mm. Cold drawn pipe outer diameter 10~108mm, wall thickness 2.0~13.0mm unequal.
Special shape seamless steel pipe is a general term of seamless steel tube except round tube. According to the shape and size of the steel pipe section, 16MnG steel can be divided into equal wall thickness seamless steel pipe (D), irregular wall seamless steel pipe (BD) and variable diameter special-shaped seamless steel pipe (code BJ). Special shaped seamless steel tubes are widely used in various structural parts, tools and machinery parts. Compared with the circular tube, the special-shaped tube generally has larger moment of inertia and sectional modulus, and has greater bending and torsional resistance, which can greatly reduce the weight of the structure and save the steel.
16MnG steel No.
(1) High quality carbon structural steel with 20G, 20MnG, 25MnG.
(2) 15MoG steel, alloy structural steel 20MoG, 12CrMoG, 15CrMoG, 12Cr2MoG, 12CrMoVG, 12Cr3MoVSiTiB etc.
(3) There are 1Cr18Ni9 and 1Cr18Ni11Nb boiler tubes used for corrosion resistant and heat-resistant steel. In addition to ensuring chemical composition and mechanical properties, water pressure tests shall be done one by one, and expansion and flattening tests shall be carried out. The pipe is delivered in heat treatment.
In addition, the microstructure, grain size and decarburization of the finished steel tube are also required.
20G main body materials is actually 20#, 16Mng main material is actually 16Mn. "G" means boiler steel, and they are added to a small amount of alloying elements to improve the performance of steel.
Compared with ordinary 20# and 16Mn, it has good impact resistance and little temperature deformation. Good corrosion resistance, micro alloying and so on.
Steel main brands: 20g, SA285GrC, SB410 boiler, SB480, 16Mng, 410B, KP42, P355GH, HII, P265GH, 16Mo3, 15Mo3, 19Mn6, SA299, BHW35, DIWA353, 13MnNiMo54, SA387Gr11GL2/GL1, SA387Gr22GL2 hydrogen.
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