35Mn2 alloy steel Plate
Standard: GB / T 3077-1999
Main Features Cold deformation of the plastic medium, cutting resistance is acceptable but poor welding. Compared with the 30Mn2 steel, high carbon content, higher strength, abrasion resistance and hardenability, quenching in oil critical diameter of 7.5 ~ 20mm, but the plastic is slightly lower, and the sensitivity of white spots overheating and temper brittleness and tendency to crack easily formed when water quenching tendency.
Application examples Usually quenched and tempered or normalized state to use in heavy and medium machine building, used as connecting rod, spindle, axle, crank, cold heading bolts and other mechanical parts requiring high stress; in agricultural machinery, used as a shovel hoe, hoe shovel handle and other wear-resistant parts; in the manufacture of small cross section (diameter <20mm) steel parts can be used instead of 40Cr.
Chemical composition mass fraction) (%) C: 0.32 ~ 0.39 Si: 0.17 ~ 0.37 Mn: 1.40 ~ 1.80 P: max 0.025 S: max 0.025 Cr: max 0.30 Ni: max 0.30 Cu: max 0.25 35Mn2
Mechanical Properties Sample blank size (mm): 25 Heat treatment: The first quenching temperature centigrade: 840; Coolant: Water The second quenching temperature centigrade: - Tempering heating temperature centigrade: 500; Coolant: Water Tensile strength ( MPa): min 835 Yield point (MPa): min 685 Elongation (%): min 12 Section shrinkage (%): min 45 Impact energy (Aku2 / J): min 55 Brinell hardness (HBS100/3000) (annealing or high temperature tempered condition): max 207
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