AISI 5140 | 41Cr4 | DIN 1.7035 Alloy Steel

AISI 5140 Alloy steel manufacturers and suppliers, supplied in round rods,square/flat bars,rollers,shafts,blocks and forging pieces.

AISI 5140 alloy steel is a structural alloyed carbon steel accding to AISI/ASTM standard which is widely used in Low and moderately stressed parts for vehicles, engines and machines where hard, wear resisting surface is needed. The hardness as surface hardened is about 54 HRC.

AISI 5140 Alloy steel bar

1.Chemical Composition

51400.38-0.430.7-0.90.15-0.35≤ 0.035≤ 0.040.7-0.9
22450.38-0.450.6-0.90.15-0.4≤ 0.0350.02-0.040.9-1.2
41Cr4/1.7035 0.38-0.45 0.6-0.9 ≤ 0.4 ≤ 0.025 ≤ 0.035 0.9-1.2

2.Related Specifications

GB: 40Cr

3.Heat Treatment & Mechanical Property

5140 normalizing diagram

AISI 5140 Steel Normalizing Diagram

AISI 5140 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.
5.Max hardness:229HB

AISI 5140-Mechanical Property With Normalizing

Tensile Strength Yield StrengthElongationReduction of AreaImpact Charpy-VTemperature
5140 annealing diagram

AISI 5140 Steel Annealing Diagram

AISI 5140 Steel Annealing Details
1.Annealing temperature:830-850℃
2.Enough soaking time for the steel heating
3.Cooling in the furnace.
4.Max hardness:200HB

AISI 5140-Mechanical Property With Annealing

Tensile Strength Yield StrengthElongationReduction of AreaImpact Charpy-VTemperature

4.Supply Size & Condition

Form of SupplySize(mm)Length(mm)
Round barΦ6-Φ1,0003,000-10,000
Square bar100x100-600x6003,000-6,000
Plate/SheetThickness :20-400
Flat bar/BlcoksThickness :120-800

Heat treatment:Normalized / Annealed / QT
Surface finish:Black / Rough turned / Peeled