40cr pipe;] Delivery status and annealed hardness, hardness ≤207HBS. 40Cr elastic modulus: elastic modulus E (20 ℃) ??/ MPa 200000 ~ 211700, the shear modulus G (20 ℃) ??quenching process 8080040Cr of 40Cr quenching 850 ℃, oil cooling; tempering 520 ℃, water, oil cooling. 40Cr steel surface hardening hardness HRC52-60, flame hardening can reach HRC48-55.40Cr nitriding 40Cr belong to nitrided steel, which contains elements conducive to nitride. 40Cr treated by nitriding obtain higher surface hardness after nitriding 40Cr quenched hardness can reach up HRA72 ~ 78 15grmo alloy tube, that is HRC43 ~ 55. Nitriding process route workpiece: Forging - annealing - rough - quenching - finishing - in addition to the stress - kibble - nitride - grinding or polishing. Since nitride thin and brittle, thus requiring the heart tissue has a higher strength, so we have to carry out transfer of heat treatment, tempering sorbite obtain improved mechanical properties and core section nitride layer quality. Nitriding soft nitriding is active, more commonly used is gas nitriding. 27simn steel 27simn silico-manganese steel pipe = 27, which is a material 12crmog seamless alloy tubes, carbon content between 0.24-0.32% simn separate because because of the five elements (carbon C, silicon Si, manganese Mn, phosphorus P, sulfur S), the content of silico-manganese steel high about 1.10-1.427SiMn weight formula: [(OD - Wall Thickness) * thickness] * 0.02466 = kg / m (weight per meter) 27siMn steel alloy tube, 12cr1movg alloy tube, the virtues of Industry (certified merchants) are provided by virtue Liaocheng Industry Co., Ltd. Alloy tube, 12cr1movg alloy tube, the virtues of Industry (certified merchants) is virtue Pipe Co., Ltd. Liaocheng (www.meidegc.com) (www.meidegc.com) (www.mdwfg.com) (www.mdggc.com) this year launched a new upgrade, the above picture is for reference only, please call the telephone or pictures on this page, for the latest information, contact: Hvdroxide.