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Based in Chennai, India, Kunj Sheets and Plates is a well-known producer and supplier with a focus on high-performance 4140 Steel Sheets and Plates. These plates are well-known for their exceptional mechanical strength, resistance to wear, and adaptability, making them perfect for high-stress industrial and structural applications. 4140 plates from Kunj, which are sourced and processed according to strict quality control procedures, provide reliable performance even under the most trying circumstances. Kunj is dedicated to providing clients in the engineering, construction, automotive, and manufacturing sectors with high-quality alloy steel products that are suited to their particular project requirements. They also guarantee timely delivery and customer satisfaction.
The composition of 4140 Steel, a chromium-molybdenum alloy, is 0.38–0.43% carbon, 0.75–1.00% manganese, 0.80–1.10% chromium, 0.15–0.25% molybdenum, and 0.15–0.35% silicon. This alloy’s well-balanced composition offers outstanding fatigue strength, impact resistance, and hardness. 4140 steel has a tensile strength of 655–1080 MPa, a yield strength of 415–950 MPa, and an elongation of up to 25%, depending on the heat treatment. High-stress engineering applications needing long-term durability and mechanical integrity can benefit greatly from its exceptional annealed machinability as well as its good response to quenching and tempering procedures.
| Grade | AISI 4140 |
| Specification | ASTM A829, UNS G41400, SCM440, 1.7225, EN19, 42CrMo4 |
| Thickness | 6 to 800 mm |
| Width | 200 to 2000 mm |
| Length | 2000 to 6000 mm |
| GOST | BS | AISI | ISO | DIN | GB | AFNOR | UNI |
| 35KHV/38KHV | 708M40 | 4140 | 42CrMo4 | 42CrMo4 | 42CrMo | 42CD4 | 42CrMo4 |
| THICKNESS | WIDTH | LENGTH | |
| HEAT TREATED | 1/4″ to 6″ | 36″ to 96″ | UPTO 240 inch |
| AS ROLLED | 1/4″ to 6″ | 36″ to 96″ | UPTO 240 inch |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
4140 steel sheet and plate offers many advantages such as high strength, hardness and corrosion resistance, making it ideal for rugged applications This alloy steel contains chromium and molybdenum to enhance its hardness and corrosion resistance high. It provides excellent fatigue strength, machinability and form ability, making it versatile in the automotive, aircraft and manufacturing industries. Additionally, 4140 steel retains its strength at high temperatures, providing extended durability in harsh environments. It is commonly used for gears, shafts, axles and heavy-duty structural components due to its robust mechanical properties.
In many industries where strength, durability, and resistance to wear and fatigue are essential, 4140 steel sheets and plates are used extensively. They are employed in the manufacturing of crankshafts, spindles, axles, and gears in the automotive and aerospace industries. 4140 is preferred in the oil and gas industry for pipeline components, tool joints, and drill collars. It is used in the construction sector for high-load frameworks, machine parts, and structural beams. It is also utilized in machine tooling, die forging, hydraulic machinery, and industrial jigs. 4140 steel is a very reliable material for cutting-edge engineering projects because of its resistance to high temperatures, pressures, and shock loads.
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