• 5140 Steel Plate 1.7035 41Cr4 SCr440 Alloy Steel 1.jpg
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5140 Steel Plate 1.7035 41Cr4 SCr440 Alloy Steel

AISI 5140 Alloy steel, we can supply the round bar, steel flat bar, plate, hexagonal steel bar and steel square block. AISI 5140RH steel Round bar can be saw to your required lengths as one offs or multiple cut pieces. And AISI 5140 alloy steel Rectangular pieces can be saw from flat bar or plate to your specific sizes.

Product introduction
What is AISI 5140 steel ?

ASTM grade 5140 is one structural alloy steel grade in ASTM A29 standard for general application. 5140 steel plate is widely used in low and moderately stressed parts for vehicles, engines and machines where hard, wear resisting surface is needed. Gnee is professional 5140 plate & round bar supplier and we keep wide size range for 5140 plate in stock for immediate shipment. Contact us for any AISI 5140 plate material request and best 5140 grade steel price.

Competitive Advantage for AISI 5140 material steel plate in Otai:

Available in stock for immediate shipment
High strength,
High tenacity
Good hardenability
High resistance to thermal properties.
Competitive price

1. Supply Range of AISI/ASTM 5140
Round Bar: diameter 20mm – 300mm

Steel Plate and Steel Block: thickness 10-200mm x width 300-2000mm

10-80mm thickness 5140 plate are available all the time in stock,
90-200mm thickness plate to be newly production in 15-30 days lead time.
Surface Finish: Black Surface, Milled Surface or Polished Surface as per given requirements.

2. Relevant AISI 5140 Specification and Equivalent Steel Grades


Country USA German Japan
Standard ASTM/AISI A29 EN 10083-3 JIS G4053
Grades 5140 41Cr4 SCr440

3. ASTM 5140 Material Chemical Composition and Equivalent

Standard Grade/Steel Number C Mn P S Si Cr Ni
ASTM A29 5140 0.38-0.43 0.70-0.90 ≤0.035 ≤0.040 0.15-0.35 0.70-0.90
EN 10083-3 41Cr4 / 1.7035 0.38-0.45 0.60-0.90 ≤0.025 ≤0.035 ≤0.40 0.90-1.20
JIS G4053 SCr440 0.38-0.43 0.60-0.90 ≤0.030 ≤0.030 0.15-0.35 0.90-1.20 ≤0.25

4. AISI 5140 Steel Properties

Property Value in metric unit Value in US unit
Density 7.872 *10³ kg/m³ 491.4 lb/ft³
Modulus of elasticity 205 GPa 29700 ksi
Thermal expansion (20 ºC) 12.6*10-6 ºCˉ¹ 7.00*10-6 in/(in* ºF)
Specific heat capacity 452 J/(kg*K) 0.108 BTU/(lb*ºF)
Thermal conductivity 44.7 W/(m*K) 310 BTU*in/(hr*ft²*ºF)
Electric resistivity 2.28*10-7 Ohm*m 2.28*10-5 Ohm*cm
Tensile strength (annealed) 572 MPa 83000 psi
Yield strength (annealed) 293 MPa 42500 psi
Elongation (annealed) 29 % 29 %
Hardness (annealed) 85 RB 85 RB
Tensile strength (normalized) 793 MPa 115000 psi
Yield strength (normalized) 472 MPa 68500 psi
Elongation (normalized) 23 % 23 %
Hardness (normalized) 98 RB 98 RB

5. Forging of 5140 Alloy Steel
Hot forming temperature: 1050-850℃.

6. ASTM 5140 Steel Heat Treat
Soft Annealing
Heat to 680-720℃, cool slowly. This will produce a maximum 5140 hardness of 241HB (Brinell hardness).

Noramlizing of steel grade 5140
Temperature: 840-880℃.

Hardening of 5140 forged steel
Harden from a temperature of 820-850, 830-860℃ followed by water or oil quenching.

Tempering of SAE 5140 material
Tempering temperature: 540-680℃.

7. Applications of AISI Grade 5140 
AISI 5140 steel can be used for low and moderately stressed parts for vehicles, engines and machines where hard, wear resisting surface is needed. Hardness as surface hardened about 54 HRC. SAE 5140 steels can also be for marine engineering industry, chemical processing plants, boiler & pressure vessels, nuclear power plants etc.

If you have queries about the 5140 specs, or any questions about the 5140 vs 4130, 5140 vs 4340 etc, please contact us for technical support any time.

Keywords: 5140 Steel Plate 1.7035 41Cr4 SCr440 Alloy Steel

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