40CrNiMoA structural steel 

 (Cash abundant, welcome to our company to discuss cooperation (Lu 13373905727) alloy steel referred to as structural steel, 40CrNiMoA is one of a structural steel, also known as alloy steel, which is in the high-quality carbon structural steel, based on appropriate to join one or more alloying elements (not more than 5% of the total) and made of steel. Executive Standard GB/T3077-1999. Unified numbering A50403; grades 40CrNiMoA. Chemical composition (%): C: 0.37 ~ 0.44, Si: 0.17 ~ 0.37, Mn: 0.50 ~ 0.80, Cr: 0.60 ~ 0.90, Mo: 0.15 ~ 0.25, Ni: 1.25 ~ 1.65; hair sample size 25mm. heat treatment: hardening 850 °, cooling agent: oil ; tempering temperature of 600 °; coolant: water, oil. mechanical properties: tensile strength MPa980, yield point MPa835, Elongation% 12% 55 reduction in area, impact absorbing energy Ak78, annealing or high temperature tempering of steel supply state Brinell hardness GBW ≤ 269. purposes: as for high strength, high toughness, large section size of the conditioning and more important parts, such as horizontal forging machine drive eccentric shaft, forging crankshaft and so on.