Physical properties of 20 steel

Information related to 20G high-pressure boiler tubes -- 5. Steel grades used for boiler tubes (1) The steel grades for high-quality carbon structural steel are 20G, 20MnG, and 25MnG. 　　(2) Alloy structural steel grades such as 15MoG, 20MoG, 12CrMoG, 15CrMoG, 12Cr2MoG, 12CrMoVG, 12Cr3MoVSiTiB, etc. 　　(3) For rust-resistant heat-resistant steel, 1Cr18Ni9 and 1Cr18Ni11Nb boiler tubes are commonly used. In addition to ensuring the chemical composition and mechanical properties, each tube must undergo a hydrostatic test, as well as flaring and flattening tests. The steel pipes are delivered in the heat-treated condition. 　　In addition, there are also certain requirements regarding the microstructure, grain size, and decarburized layer of the finished steel pipes. 　　6. Physical property testing (1) As specified in GB3087-82 \"Seamless steel tubes for low and medium pressure boilers\". Tensile testing is carried out in accordance with GB/T228-87, hydrostatic testing in accordance with GB/T241-90, flattening testing in accordance with GB/T246-97, flaring testing in accordance with GB/T242-97, and cold bending testing in accordance with GB244-97. 　　(2) As specified in GB5310-95 \"Seamless Steel Tubes for High-Pressure Boilers\". The tensile test, hydrostatic test, and crushing test are the same as those specified in GB3087-82 ； The impact test is carried out in accordance with GB229-94, the flaring test in accordance with GB/T242-97, and the grain size test in accordance with YB/T5148-93 ； Microstructure inspection is carried out in accordance with GB13298-91, decarburized layer inspection is in accordance with GB224-87, and ultrasonic inspection is in accordance with GB/T5777-96. 　　(3) The physical property testing and specifications for imported boiler tubes shall be carried out in accordance with the relevant standards specified in the contract.

Friends on the 2nd floor, but it doesn’t have any physical properties

Physical properties can be found in a small hardware manual.