40Mn2 steel round bar equivalent 40Cr

40Mn2 steel round bar is a medium carbon transfer manganese steel, The strength, plasticity and wear resistance of 40Mn2 steel round bar are high, and the machinability of cutting and heat treatment is good. The critical quenching diameter of the oil is 8.5 ~ 23mm in diameter, and the critical quenching diameter reaches 20 ~ 42mm in water.

The static strength and fatigue properties of 40Mn2 steel round bar is equivalent to 40Cr steel, so it can be used as the substitute steel for 40Cr. 40 mn2 is common used in the quenched and tempered state, can be used in the manufacture of heavy duty work under the conditions of parts, such as shaft, crankshaft, axle, piston rod, worm, leverage, connecting rod, a load of bolts, screws, reinforcing ring, spring, and other conditioning. 40Mn2 is generally used for small cross sections with diameters less than 50mm.

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