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 | 41CR4 | DIN 1.7035 ALLOY STEEL

1.Chemical Composition

Grade C Mn Si P S Cr
5140 0.38-0.43 0.7-0.9 0.15-0.35 ≤ 0.035 ≤ 0.04 0.7-0.9
2245 0.38-0.45 0.6-0.9 0.15-0.4 ≤ 0.035 0.02-0.04 0.9-1.2
41Cr4/1.7035 0.38-0.45 0.6-0.9 ≤ 0.4 ≤ 0.025 ≤ 0.035 0.9-1.2


2.Related Specifications

EN/DIN:41Cr4/1.7035
GB: 40Cr
JIS:SCr440
BS:530M40

3.Heat Treatment & Mechanical Property

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 Strength Elongation Reduction of Area Impact Charpy-V Temperature
≥740Mpa ≥460Mpa ≥17% ≥62% ≥108J 860℃

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 Strength Elongation Reduction of Area Impact Charpy-V Temperature
≥692Mpa ≥396Mpa ≥19% ≥51% ≥82J 850-860℃
≥660Mpa ≥410Mpa ≥16% ≥66% ≥126J 910℃

4.Supply Size & Condition

Form of Supply Size(mm) Length(mm)
Round bar Φ6-Φ1,000 3,000-10,000
Square bar 100x100-600x600 3,000-6,000
Plate/Sheet Thickness :20-400
Width:80-1,000 		2,000-6,000
Flat bar/Blcoks Thickness :120-800
Width:120-1,500 		2,000-6,000

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

RFQ AISI 5140 STEEL