Phanuphong Steel and Plates, a reputable manufacturer and supplier based in Bangkok, Thailand, has built a solid reputation for providing top-notch Alloy Steel 4140 Fasteners. With a strong focus on precision engineering and adherence to international quality standards, this company delivers fasteners that are engineered for exceptional performance and durability. Known for their impressive strength, toughness, and wear resistance, Alloy Steel 4140 Fasteners are perfect for demanding industrial settings. Phanuphong Steel is dedicated to ensuring reliability, timely deliveries, and customer-centric services, catering to a wide range of industries both in Thailand and around the globe with high-quality fastening solutions.
These fasteners are primarily made up of chromium, molybdenum, and manganese, with a carbon content of about 0.38–0.43%. This specific blend boosts their hardness, toughness, and resistance to corrosion. They showcase a tensile strength ranging from 655–1040 MPa, a yield strength of approximately 415–850 MPa, and a Rockwell hardness between 24–32 HRC. Additionally, they offer excellent fatigue strength, impact resistance, and good machinability when heat-treated. The perfect balance of hardness and ductility makes them incredibly reliable in high-stress and heavy-load situations, ensuring they perform well in demanding engineering applications.
| 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 industries where high strength, toughness, and wear resistance are essential. They’re commonly used in automotive components, machinery parts, power generation facilities, and heavy equipment. In the oil and gas industry, these fasteners are the go-to choice for pipelines, rigs, and drilling equipment, thanks to their ability to endure extreme pressure and temperature. The aerospace and defense sectors also rely on them for structural components that demand durability and reliability. Furthermore, they are utilized in construction, shipbuilding, and manufacturing, providing secure fastening solutions for high-performance systems that face heavy mechanical and thermal stresses.
Phanuphong 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 Bangkok, Thailand.
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