Hemi Metals, located in Hamilton, New Zealand, is a reputable manufacturer and supplier of high-performance Alloy Steel AISI 4140 Bars and Rods, designed for tough mechanical and structural applications. AISI 4140 is a chromium-molybdenum alloy steel celebrated for its remarkable strength, toughness, and wear resistance. Crafted with meticulous dimensional control and advanced heat-treatment techniques, these bars and rods ensure dependable performance even under high stress and impact loads. Hemi Metals caters to various industries, including automotive, oil & gas, mining, power generation, and heavy engineering, where durability, strength, and longevity are crucial.
Alloy Steel AISI 4140 typically comprises 0.38–0.43% carbon, 0.80–1.10% chromium, and 0.15–0.25% molybdenum, along with controlled levels of manganese and silicon. This well-balanced alloy composition grants excellent hardenability, impressive tensile strength, and solid impact toughness. When heat-treated, AISI 4140 bars and rods achieve tensile strength ranging from 850–1000 MPa, boasting high yield strength and good fatigue resistance. Additionally, the material offers commendable machinability, wear resistance, and structural stability under dynamic loads.
| 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 find extensive use in applications that demand high strength, toughness, and wear resistance. They are commonly utilized in shafts, gears, crankshafts, spindles, axles, bolts, studs, and heavy-duty fasteners. In the oil & gas and power generation industries, these bars serve as drill collars, coupling components, and turbine parts. AISI 4140 is also widely used in mining equipment, construction machinery, automotive transmission systems, and industrial tooling. Its excellent response to heat treatment and high fatigue strength guarantee reliable long-term performance in challenging mechanical environments.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Hemi Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Hamilton New Zealand
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