Performance Requirements (1) a high surface hardness of the carburized layer to ensure excellent wear resistance and contact fatigue resistance, and has adequate ductility and toughness. (2) central portion having high toughness and high strength enough. The heart is insufficient toughness under impact load or loads too easily broken; insufficient strength, the more brittle carburized layer easily broken, peeling. (3) have a good performance at high heat treatment process of carburizing temperature (900 ℃ ~ 950 ℃), heat-resistant steel, austenite grain is not easy to grow up, Hefei steel, and have a good hardenability. 1 special structural steel, pressure vessel steel plate: with a capital R in grades tail, said the grade is available yield point can also be carbon or alloy containing element. Such as: Q345R, 50mn steel, Q345 as the yield point. Another example: 20R, 16MnR, 15MnVR, 15MnVNR, 8MnMoNbR, MnNiMoNbR, 15CrMoR etc. with carbon or alloy containing elements represented; 2, welding gas cylinder steel plate: HP capitalized at the end of grades represented, q235b steel, the grade yield point can be expressed as: Q295HP, Q345HP; containing alloying elements can also be used to represent, such as: 16MnREHP. Steel plate _ quote _ Hefei Show Bo Trading (view) by Hefei Show Bo Trading Company. Hefei Show Bo Trading Company (www.hfzhanbo.com) (www.hfzhanbo.com) is a professional engaged in "channel, angle, I-beam, H-shaped steel, square tube, steel, light rail, heavy rail, crane rail" company. Since its inception, we adhere to the "good faith, sound management" approach, the courage of healthy competition in the market, so that the "Show Bo" brand has a good reputation. We adhere to the "service first, customer first" principle, so that the public exhibition of Commerce Bo won the trust of customers in the steel, and establish a good corporate image. Special Note: This information is for reference only pictures and information, please contact us to obtain the most accurate information, thank you!