Manufactures & Suppliers of Pipes, Tubes, Flanges, Pipe Fitting & Fasteners
4140 Fasteners
4140 Fasteners are a high-strength chromium-molybdenum alloy steel grade designed for low-temperature bolting applications. At Natron, we are proud to be one of the leading manufacturers of 4140 Fasteners, offering a wide range of major grades including A193 B7, B7M, A320 L7, L7M, and more. We provide premium-quality 4140 Fasteners, including 4140 bolts, screws, nuts, washers, and other fasteners that meet various international standards and specifications.
4140 Stud Bolt, 4140 Bolt, 4140 Nuts, 4140 Fasteners Supplier and Manufacturer in Mumbai, India
As a prominent ISO-certified manufacturer and supplier, we take pride in supplying a diverse array of 4140 Fasteners to multiple industries, including aerospace, defense, automotive, petrochemical, waste processing, marine, pharmaceutical, and many others.
4140 Fasteners Specification
| 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 | 4140 bolts, 4140 nuts, 4140 washers, 4140 anchor fasteners, 4140 stud bolts, 4140 eye bolts, 4140 studs, 4140 threaded rods, 4140 cotter pins, 4140 socket screws, 4140 fine fasteners & spares, 4140 foundation fasteners, etc. |
4140 fasteners are formed using cold forging techniques; however, larger-sized fasteners or small quantities of 4140 bolts are produced by hot forging or directly machined from 4140 bar stock. We supply 4140 fasteners that offer a stable combination of high strength, toughness, weldability, and machinability, along with excellent fatigue strength.
4140 Fasteners Chemical Composition
| Element | 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 |
4140 Fasteners Mechanical Properties
| Grade 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 |
4140 Fasteners Physical Properties
| Grade 4140 | Metric | Imperial |
| Density | 7.85 g/cm³ | 0.284 lb/in³ |
| Melting point | 1416°C | 2580°F |
