Marzouk Steel stands out as a top-notch manufacturer and supplier of high-performance steel products, proudly based in Tunis, Tunisia. They cater to a diverse array of industrial needs and have built a solid reputation for providing Alloy Steel 4140 Fasteners that adhere to international quality and dimensional standards. Thanks to their state-of-the-art production facilities and a strong commitment to quality assurance, Marzouk Steel consistently delivers fasteners that boast exceptional strength, durability, and reliability. Their dedication to precision manufacturing, on-time delivery, and customer satisfaction has established them as a trusted partner across various sectors, including oil and gas, construction, power generation, and heavy engineering.
The Alloy Steel 4140 Fasteners are crafted from a chromium-molybdenum alloy steel, renowned for its outstanding mechanical performance. The chemical makeup features carbon for added strength, chromium for enhanced hardness and corrosion resistance, and molybdenum to boost toughness and high-temperature stability. Other elements like manganese and silicon further improve strength and machinability. Mechanically, these fasteners excel with high tensile and yield strength, impressive fatigue resistance, and remarkable impact toughness. They respond well to heat treatment, which enhances their hardness and wear resistance, making them ideal for demanding service conditions.
| 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 |
Alloy Steel 4140 Fasteners find their place in various applications where high strength and stress resistance are crucial. They’re commonly used in oil and gas equipment, pressure vessels, and pipeline systems. In the realms of construction and heavy engineering, these fasteners play a vital role in structural joints, machinery assembly, and load-bearing connections. Industries such as automotive, power generation, and mining also depend on Alloy Steel 4140 Fasteners for essential components that face vibration, heavy loads, and harsh operating conditions, ensuring long-lasting performance and safety.
Marzouk 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 Tunis, Tunisia.
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