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. Otai 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 10-140mm x width 100-2200mm
- 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
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.
