42CrMo4+QT Steel bar| DIN 1.7225-EN10083

42CrMo4/DIN 1.7225 Alloy Steel manufacturers and suppliers, supplied with round rods,square/flat bars,rollers,shafts,blocks and forging pieces.

42CrMo4/DIN 1.7225 steel is a commonly used grade contains Chromium-Molybdenum elements in European standard EN10083 and EN10250. This steel has good strength and toughness,and good low-temperature impact toughness which are mostly used after quenched and tempered heat treatment. DIN 1.7225 / 42CrMo4  is widely used in large size and important parts,such as axle,gear,connecting rod,engine cylinder,spring,oil drill pipe joints and pinions.

42CrMo4 Forged round bar

1.Chemical Composition

42CrMo4/1.72250.38-0.45≤ 0.40.6-0.9≤ 0.025≤ 0.0350.9-1.20.15-0.3
41400.38-0.430.15-0.35 0.75-1.0 ≤0.035≤0.0350.8-1.10.15-0.25

2.Related Specifications


3.Heat Treatment & Mechanical Property

42CrMo4 Normalizing Diagram

42CrMo4 Normalizing Diagram

42CrMo4 Steel Normalizinging Details
1.Normalize temperature:850-880℃
2.Three steps for temperature raising.
3.Proper holding time depends on the dimension.
4.Air cooling.

42CrMo4-Mechanical Property With Normalizing

Tensile Strength Yield StrengthElongationReduction of AreaImpact Charpy-VHardness
42CrMo4 Annealing Diagram

42CrMo4 Annealing Diagram

42CrMo4 Steel Annealing Details
1.Annealing temperature:680-720℃
2.Enough time for temperature holding
3.Cooling in the furnace.
4.Max hardness:229HB

42CrMo4-Mechanical Property With Annealing

Tensile Strength Yield StrengthElongationReduction of AreaImpact Charpy-VHardness
42CrMo4 Quenching diagram

42CrMo4 Quenching Diagram

Quenching Details
1.Quench temperature:820-880℃
2.Three steps of temperature raising for evenly heating.
3.Hold suitable time for the steel to be thoroughly heated.
4.Oil or Water Quench.
5.Tempering immediately after quenched.

42CrMo4 Tempering diagram

42CrMo4 Tempering Diagram

Tempering Details
1.Temper temperature:540-680℃
2.Air cooling.

42CrMo4-Mechanical Property With Quenching and Tempering

Size mmTensile,Mpa
Charpy Impact,J Hardness,HB
Sample location
Φ23080460423.557+20℃,902701/3 Radius
Φ31087967719.557+20℃,622901/3 Radius
Φ45080356620.548+20℃,542581/3 Radius
Φ5407185332154+20℃,562601/3 Radius
Φ7007605481955-20℃,282551/3 Radius

4.Supply Size & Condition

Form of SupplySize(mm)
Round barΦ16-Φ1,000
Square barThinkness:Max 800
Flat bar/BlcoksThickness :120-800

Heat treatment:Normalized / Annealed / Q&T
Surface finish:Black / Rough turned / Peeled