Ojas Pipes and Tubes, located in Kolkata, India, has built a solid reputation as a manufacturer and supplier of high-performance Alloy Steel AISI 4140 Bars and Rods. We take pride in providing top-notch alloy steel bars that are renowned for their remarkable strength, toughness, and resistance to fatigue. Our AISI 4140 bars are meticulously engineered to meet the stringent requirements of various industries, including automotive, aerospace, oil & gas, and tooling. With a strong focus on quality and customer satisfaction, Ojas Pipes and Tubes offers customizable dimensions, timely delivery, and competitive pricing—making us a trusted name in both the Indian and international steel markets.
AISI 4140 Alloy Steel Bars/Rods mainly consist of carbon (0.38–0.43%), chromium (0.80–1.10%), and molybdenum (0.15–0.25%), with manganese, silicon, and iron as the balancing elements. This unique composition results in exceptional strength and toughness. The material boasts a tensile strength ranging from 655–1080 MPa, a yield strength of 415–930 MPa, and impressive impact resistance. It also maintains good ductility and hardness (Rockwell C scale up to 28–32 when heat treated), making it perfect for heavy-duty applications and machining.
| Dimensions | : | EN, DIN, JIS, ASTM, BS, ASME, AISI |
| Size | : | 5 mm To 500 mm |
| Diameter | : | 0.1 mm to 100 mm |
| Length | : | 100 mm To 3000 mm Long & Above |
| Finish | : | Black, Bright Polished, Rough Turned, NO.4 Finish, Matt Finish, BA Finish |
| Tolerance | : | H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or as per clients’ requirements |
| Form | : | Round, Square, Hex (A/F), Rectangle, Billet, Ingot, Forging Etc. |
| Grade | C | Mn | Si | P | S | Fe | Mo | Ni | Cr |
| AISI / SAE 4140 | 0.38-0.43 | 0.75-1.00 | 0.20-0.35 | 0.035 max | 0.035 MAX | – | – | 0.15-0,25 | 0.80-1.10 |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 7.85 g/cm3 | 1432 ℃ | 560 | 460 | 21.50% |
Alloy Steel AISI 4140 Bars and Rods are known for their excellent strength, toughness, and wear resistance. With a chemical composition that includes chromium and molybdenum, they offer improved hardness, fatigue resistance, and good machinability, making them ideal for demanding applications.
AISI 4140 Bars and Rods are commonly used in automotive, aerospace, oil and gas, construction, and heavy machinery industries. They are ideal for manufacturing parts such as gears, shafts, crankshafts, and axles that require high strength and durability.
Yes, Alloy Steel AISI 4140 Bars and Rods can be heat treated to achieve desired mechanical properties. Heat treatment processes such as quenching and tempering can increase hardness, strength, and toughness, making the material suitable for high-stress applications.
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | EN |
| AISI / SAE 4140 | 1.7225 | G41400 | SCM 440 | BS 708M40 | 1.7223 |
Alloy Steel AISI 4140 Bars and Rods are extensively utilized in demanding engineering and structural applications due to their high tensile strength and fatigue resistance. Common applications include crankshafts, axles, drive shafts, gears, drill collars, and hydraulic machine parts. They are particularly favored in the automotive, aerospace, oil & gas, defense, and tooling sectors. The material’s ability to endure high loads and pressure makes it ideal for high-performance equipment and components where durability and safety are paramount. AISI 4140 bars are also heat-treatable, providing greater flexibility in achieving the desired mechanical properties.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Rupal Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Delhi, India
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