the difference is the max load which the material will withstand until failure 52 stands more than 37
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EN 52 steel is generally used in engine valves (Withstand high temperature) 5Cr9Si3
DIN 1.0570 ST 52-3 is a type of steel. These can be carbon steel or other types of steel. A material data sheet will help figure out the equivalent.
4.5 kg/sq.mm
would you tell me the difference Material quality between St-52 and S355JR
quenching is rapid cooling of steel to be heat treated, there are basically four types of quenching: 1- by water. 2- by oil. 3- by air. 4- by furnace. water oil air furnace tensile stress 175*104 112*104 88*104 52*104 (N/mm2)