Esha Steel is a reputable manufacturer and supplier of top-notch Alloy Steel 4140 Fasteners, proudly based in Kolkata. They’re well-known for providing precision-engineered fastening solutions across a variety of industries. Thanks to their advanced manufacturing capabilities and rigorous quality control, Esha Steel guarantees that each fastener meets global standards for strength, durability, and performance. Their Alloy Steel 4140 Fasteners are specifically designed to endure tough conditions, making them perfect for critical applications. Catering to sectors like automotive, construction, oil and gas, machinery, and engineering, Esha Steel has built a solid reputation for reliability, timely delivery, and consistent product quality.
Alloy Steel 4140 Fasteners are made from a blend of chromium, molybdenum, and carbon, which gives them remarkable strength, toughness, and wear resistance. These elements enhance hardenability, allowing the fasteners to maintain impressive mechanical performance even under stress. They boast high tensile strength, good fatigue resistance, and exceptional toughness after heat treatment. Their well-balanced chemical composition ensures they can withstand abrasion, shock, and temperature fluctuations, making them ideal for demanding mechanical and structural applications that require long-lasting stability and durability.
| Standard | ASTM A193, ASTM A194 / ASME SA193, SA194 GR, IS, BS |
| Specification | IS, BS, ASTM |
| Size | M 02 to M 160 |
| Length | UPTO 5 METERS |
| Grade | B 6, B 7/ B 7M, B 16, 2, 2HM, 2H, GR 6, B 7, B 7M |
| Type | Bolts, nuts, Washers, Anchor Fasteners, Stud Bolts, Eye Bolt, Stud, Threaded Rod, Cotter Pin, Socket Screw, Fine Fasteners & Spares, Foundation Fasteners, etc. |
| Element | AISI 4140 |
| Fe | 96.785 – 97.77 |
| Cr | 0.80 – 1.10 |
| Mn | 0.75 – 1.0 |
| C | 0.380 – 0.430 |
| Si | 0.15 – 0.30 |
| Mo | 0.15 – 0.25 |
| S | 0.040 |
| P | 0.035 |
| Grade AISI 4140 | Metric | Imperial |
| Tensile strength | 655 MPa | 95000 psi |
| Yield strength | 415 MPa | 60200 psi |
| Bulk modulus (Typical for steel) | 140 GPa | 20300 ksi |
| Shear modulus (typical for steel) | 80 GPa | 11600 ksi |
| Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation at break (in 50 mm) | 25.70% | 25.70% |
| Hardness, Brinell | 197 | 197 |
| Hardness, Knoop (converted from Brinell hardness) | 219 | 219 |
| Hardness, Rockwell B (converted from Brinell hardness) | 92 | 92 |
| Hardness, Rockwell C (Converted from Brinell hardness, value below normal HRC range, for comparison purposes only.) | 13 | 13 |
| Hardness, Vickers (converted from Brinell hardness) | 207 | 207 |
| Machinability (Annealed and cold drawn. Based on 100% machinability for AISI 1212 steel.) | 65 | 65 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
| Grade AISI 4140 | Metric | Imperial |
| Thermal expansion co-efficient (@ 0-100°C/32-212°F) | 12.2 µm/m°C | 6.78 µin/in°F |
| Thermal conductivity (100°C) | 42.6 W/mK | 296 BTU in/hr.ft².°F |
These fasteners are widely utilized in industries that need strong, reliable, and durable fastening solutions. In the automotive and machinery sectors, they find their place in engines, gear systems, suspension components, and heavy-duty mechanical assemblies. The oil and gas industry counts on these fasteners for high-pressure equipment, pipelines, and drilling tools, thanks to their strength and wear resistance. In construction and structural engineering, they are essential for load-bearing frameworks and precision-built components. Their outstanding toughness and stability also make them suitable for aerospace support equipment, industrial tools, and high-impact applications that demand long-lasting performance.
Esha Steel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Kolkata India.
Copyright 2025 Esha Steel. All rights reserved
