Vinit Stainless provides high-quality SS 348 fasteners from Chennai for thermal processing and chemical industries. SS 348 is columbium-stabilized austenitic stainless steel with resistance to intergranular corrosion and maintaining mechanical properties at elevated temperatures. Vinit produces bolts, studs, and washers ideal for power generation and reactor applications. Vinit ensures that each fastener maintains strict material and dimensional standards and provides long-term reliability in applications where thermal stability and corrosion resistance are essential.
SS 348 has 17–19% chromium, 8–11% nickel, columbium stabilizing, and ≤0.08% carbon content. It provides tensile strength of 515–620 MPa, yield strength of 205 MPa, and elongation of approximately 35%. It has strength retention on long exposure to temperatures up to 800°C and resists intergranular corrosion even in welded condition. The microstructure is completely austenitic, providing superior toughness and oxidation resistance.
| Element | Content (%) |
|---|---|
| Iron, Fe | 66 |
| Chromium, Cr | 18 |
| Nickel, Ni | 10 |
| Manganese, Mn | 2.0 |
| Silicon, Si | 1.0 |
| Nb + Ta | 0.8 |
| Cobalt, Co | 0.2 |
| Tantalum, Ta | 0.1 |
| Carbon, C | 0.080 |
| Phosphorous, P | 0.045 |
| Sulfur, S | 0.030 |
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 655 MPa | 95000 psi |
| Yield strength (@ strain 0.200%) | 275 MPa | 39900 psi |
| Izod impact | 120 – 160 J | 88.5 – 118 ft-lb |
| Charpy impact | 160 J | 118 ft-lb |
| Shear modulus (typical for steel) | 77.0 GPa | 11200 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) | 45% | 45% |
| Hardness, Brinell (converted from Rockwell B hardness) | 147 | 147 |
| Hardness, Knoop (converted from Rockwell B hardness) | 164 | 164 |
| Hardness, Rockwell B | 85 | 85 |
| Hardness, Vickers (converted from Rockwell B hardness) | 169 | 169 |
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Stainless Steel 348 Nuts offer exceptional corrosion resistance, particularly in harsh environments. They are available in various sizes, typically from M3 to M30, with standard dimensions conforming to ISO or ANSI specifications, ensuring secure fastening in industrial applications.
Stainless Steel 348 Stud Bolts provide superior corrosion resistance and are ideal for high-temperature applications. They usually come in sizes from M6 to M36 and lengths from 50 mm to 300 mm, meeting industrial standards for strength and durability.
Stainless Steel 348 Bolts are known for their high corrosion resistance and high-temperature performance. They are available in sizes from M6 to M30 and can be found in various lengths, complying with ANSI or ISO standards, and are suitable for heavy-duty applications.
Stainless Steel 348 Threaded Rods offer excellent resistance to oxidation and corrosion. They are commonly available in diameters from M6 to M30 and lengths ranging from 100 mm to 1000 mm. They are used in applications requiring continuous threading and high strength.
Stainless Steel 348 Screws provide robust corrosion resistance, particularly in aggressive environments. Available in sizes from M3 to M20 and lengths from 10 mm to 100 mm, they are used for precise and secure fastening in various mechanical assemblies.
Stainless Steel 348 Washers offer superior corrosion resistance and are used to distribute the load of a screw or bolt. They come in sizes from M4 to M36 and various thicknesses, adhering to standard dimensions for reliable performance in harsh conditions.
SS 348 fasteners are applied extensively in nuclear reactors, power plants, exhaust systems, and thermal equipment. Due to their resistance to stress corrosion and stability at high temperatures, they find applications in pressure vessels, chemical tanks, and welded parts that undergo thermal cycling. Vinit Stainless provides reliable SS 348 fasteners to the energy, petrochemical, and marine industries, ensuring increased safety and reliability.
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