What is the hardness of 40Cr material?

40Cr material is a medium carbon modulation steel, cold heading die steel. The steel is moderately priced and easy to process. After proper heat treatment, certain toughness, plasticity and wear resistance can be obtained. Normalizing can promote the spheroidization of the tissue and improve the cutting performance of the roughness of less than 160HBS. Tempering at a temperature of 550 ~ 570 ℃, the steel has the best comprehensive mechanical properties. The hardenability of this steel is higher than that of 45 steel, which is suitable for surface hardening treatment such as high frequency quenching and flame quenching.

40Cr steel delivery status: annealed
Hardness of 40Cr material ≤207HBS.

Application of 40Cr material
After being tempered, 40Cr alloy steel is used to manufacture mechanical parts that can withstand medium load and medium speed work, such as automobile knuckles, rear half shafts, and gears, shafts, worms, spline shafts, center sleeves on machine tools; After tempering, it is used to manufacture parts that withstand high load, impact and medium speed work, such as gears, spindles, oil pump rotors, sliders, collars, etc.; after quenching and low temperature tempering, it is used to manufacture heavy loads and low impact And parts with wear resistance, with a solid thickness of less than 25mm on the cross section, such as worms, spindles, shafts, collars, etc.; after quenching and tempering and high-frequency surface quenching, they are used to manufacture high surface hardness and wear resistance without Parts with great impact, such as gears, sleeves, shafts, main shafts, crankshafts, mandrels, pins, connecting rods, screws, nuts, intake valves, etc. In addition, this steel is suitable for manufacturing various transmission parts for carbonitriding, such as gears and shafts with large diameters and good low temperature toughness.