SAE 5140 ALLOY STEEL-ASTM A29
SAE 5140 Alloy steel manufacturers and suppliers, supplied in round rods,square,flat bars,rollers, shafts,blocks and forging pieces.
SAE 5140 alloy steel is a structural alloyed carbon steel accding to ASTM standard which is widely used in Low and moderately stressed parts for vehicles, engines and machines where hard and wear resisting surface is needed. The hardness as surface hardened is about 54 HRC.
SAE 5140 alloy steel is usually supplied in quenched and tempered condition
SAE 5140 Steel 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 |
| 41Cr4/1.7035 | 0.38-0.45 | 0.6-0.9 | ≤ 0.4 | ≤ 0.025 | ≤ 0.035 | 0.9-1.2 |
SAE 5140 Steel Related Specifications
EN/DIN:41Cr4/1.7035
GB: 40Cr
JIS:SCr440
BS:530M40
SAE 5140 Steel Heat Treatment & Mechanical Property
SAE 5140 Steel Normalizinging
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
SAE 5140 Steel Normalizing Diagram
SAE 5140-Mechanical Property With Normalizing
| Normalizing Temperature | Tensile Strength | Yield Strength | Elongation | Reduction of Area | Impact Charpy-V |
| 860℃ | ≥740Mpa | ≥460Mpa | ≥17% | ≥62% | ≥108J |
SAE 5140 Steel Annealing
1.Annealing temperature:830-850℃
2.Enough soaking time for the steel heating
3.Cooling in the furnace.
4.Max hardness:200HB
SAE 5140 Steel Annealing Diagram
SAE 5140-Mechanical Property With Annealing
| Temperature | Tensile Strength | Yield Strength | Elongation | Reduction of Area | Impact Charpy-V |
| 850-860℃ | ≥692Mpa | ≥396Mpa | ≥19% | ≥51% | ≥82J |
| 910℃ | ≥660Mpa | ≥410Mpa | ≥16% | ≥66% | ≥126J |
SAE 5140 Steel Quenching & Tempering(Q&T)
Process Details
- Quenching Temperature:830-860ºC
- Quenching Medium: Oil
- TemperingTemperature:400-600ºC
- Cooling Medium:Air
SAE 5140 Steel Mechanical Property with Quenched and Tempered Condition
| Tensile Strength Mpa | Yield Strength Mpa | Elongation % | Reduction of Area % | Impact Charpy-V J |
| ≥1000 | ≥800 | ≥9 | ≥45 | ≥60 |
SAE 5140 Steel Quality Certification
A material test report(Inspection Certificate EN 10204 3.1) will be provided, documenting the following:
1.Chemical analysis
2.Mechanical properties
3.Surface hardness
4.Non metallic inclusion
5.Heat treatment report
6.Grain size
7.Forging ratio
8.Ultrasonic test report
SAE 5140 Steel Supply Form & Size
- Round Bars: Dia.80 – 1,000mm as Forged
- Flat / Square Bars: Thickness Max.800mm
- Shafts, Rollers, Blocks: Customized or According to Drawing
- Rolled Round Bars: Dia.16 – 300mm with UT Assurance
Heat treatment:Quenched and Tempered (+QT), Normalizing (+N), Annealing (+A)
Surface finish:Black / Rough turned / Peeled
