SAE4140 QT Seamless Alloy Steel Tube 48x12mm - 655 MPa Tensile Strength, 28-34 HRC Hardness
Price:
Negotiable
MOQ:
2Tons
Delivery Time:
20days
Brand:
Joyruns
Product Description
SAE4140 QT Seamless Alloy Steel Tube Overview
SAE4140+QT EN10083-3 cold drawn alloy precision steel tubes are engineered for high-pressure and heavy-duty applications requiring exceptional strength and durability. These chromium-molybdenum alloy tubes deliver superior performance in demanding industrial environments.
Typical Applications
- Hydraulic cylinders
- Drilling equipment
- Bushings and spacers
- Axles and rollers
- Sleeves and structural components
Material Properties
4140 alloy steel is a high-quality quenched and tempered alloy structural steel classified as medium carbon alloy steel. Oil quenched & tempered hardness ranges from 28-34 HRC, while annealing delivery hardness is less than 250HB.
Key Characteristics
- Chromium content ensures excellent hardness penetration
- Molybdenum provides uniform hardness and strength distribution
- Tensile strength up to 170,000 psi (1172 N/mm²) for small sections
- Good ductility and resistance to shock loading
- Suitable for high and low-temperature applications
- Compatible with sour gas environments with appropriate heat treatments
Chemical Composition
| Standard | Grade | C | Mn | P | S | Si | Ni | Cr | Mo |
|---|---|---|---|---|---|---|---|---|---|
| ASTM A29 | 4140 | 0.38-0.43 | 0.75-1.00 | 0.035 | 0.040 | 0.15-0.35 | - | 0.8-1.10 | 0.15-0.25 |
| EN 10250 | 42CrMo4/1.7224 | 0.38-0.45 | 0.6-0.9 | 0.035 | 0.035 | 0.4 | - | 0.9-1.2 | 0.15-0.30 |
| JIS G4105 | SCM440 | 0.38-0.43 | 0.60-0.85 | 0.03 | 0.03 | 0.15-0.35 | - | 0.9-1.2 | 0.15-0.30 |
Mechanical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 655 MPa | 95000 psi |
| Yield strength | 415 MPa | 60200 psi |
| Bulk modulus | 140 GPa | 20300 ksi |
| Shear modulus | 80 GPa | 11600 ksi |
| Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| Elongation at break | 25.70% | 25.70% |
| Hardness, Brinell | 197 | 197 |
| Machinability | 65 | 65 |
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Company
Changzhou Joyruns Steel Tube CO.,LTD
Location
No.143 Qingyang North road,Tianning district. Changzhou
Contact Person
Lee