42CrMo4 Alloy Steel | DIN 1.7225
42CrMo4 is alloyed heat treatable steel which is used in quenched and tempered condition with a typical tensile strength of 900 -1200 N/mm².It has high strength,good wear-resistance,high fatigue strength and good low-temperature impact toughness.Similar to AISI 4140,SCM440,only a little different in Mn,Cr,this material also has good machinability,but poor in weldability.
1.42CrMo4 steel Supply Form & Size
|Form of Supply||Size(mm)||Length(mm)|
|Flat bar/Blcoks||Thickness :120-800|
|Surface Finish||Black-Forged||Black-Rolled||Turned||Grinding||Polished||Peeled||Cold Drawn|
|Tolerance||(0，+5mm)||(0，+1mm)||(0，+3mm)||Best h9||Best h11||Best H11||Best H11|
3.Chemical Composition&Related Specifications
|42CrMo4/1.7225||0.38-0.45||≤ 0.4||0.6-0.9||0.9-1.2||0.15-0.3||≤ 0.025||≤ 0.035|
|Diameter d mm||≤ 16||16-40||40-100||100-160||160-250|
|Thickness t mm||< 8||8-20||20-60||60-100||100-160|
|Yield Strength Mpa||≥900||≥750||≥650||≥550||≥500|
|Tensile Strength Mpa||1100-1300||1000-1200||900-1100||800-950||750-900|
|Reduction of area ,%||≥40||≥45||≥50||≥50||≥55|
1.Preheat 42CrMo4 engineering steel uniformly and slowly;
2.Increase the forging temperature up to 1150-1200°C;
3.Hold suitable time for the steel to be thoroughly heated before forge;
4.Reheat steel when temperature below 850°C;
5.Cooling as slowly as possible in still air or in sand after forged.
Normalizing:850℃-880℃,cool in air
Annealing:800℃-850℃,Cool in furnace,241HB Max.
Tempering:550°C – 650°C, cool in still air
42CrMo4 has high strength and wear-resistance,widely used in the automotive and aircraft industry, such as axle legs, axles, drive rods, crankshafts,pinions, gearwheels, linings, link plates,belt buckles, springs, saw blades, knifes and scissors.