Operating from the heart of Addis Ababa, Desta Steel stands as a trusted partner for industries requiring uncompromising strength and reliability. We take pride in our specialized focus on manufacturing and supplying Alloy Steel 4140 fasteners, components that form the critical backbone of heavy-duty machinery and demanding applications. Our commitment is to deliver more than just a product; we provide a foundation of security and performance that construction, manufacturing, and energy sectors across Ethiopia can depend on for their most challenging projects.
The exceptional performance of our 4140 alloy steel fasteners comes from a specific composition, primarily a blend of chromium and molybdenum. This careful formulation allows them to be heat-treated to achieve a remarkable balance of high tensile strength, excellent toughness, and good wear resistance. Essentially, this means they are built to withstand significant stress, resist shock impacts, and endure prolonged friction without failing, making them far superior to standard fastener materials for heavy-load situations.
| 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 |
You will typically find our 4140 alloy steel fasteners in places where failure is not an option. They are essential in constructing heavy machinery, securing critical components in mining equipment, and forming the structural joints of large-scale agricultural implements. The automotive and energy sectors also rely on them for high-stress assemblies in engines, lifting gear, and drilling equipment. Essentially, wherever there are immense forces, vibrations, or heavy loads at play, these fasteners provide the necessary integrity to keep everything securely and safely together.
Desta 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 Addis Ababa, Ethiopia.
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