Njabulo Stainless is a reliable manufacturer and supplier of Stainless Steel 348 Nuts, proudly based in Cape Town, South Africa. The company focuses on crafting top-notch austenitic stainless steel fasteners that boast impressive corrosion resistance, high strength, and long-lasting durability. Their Stainless Steel 348 Nuts are specifically designed for tough industrial, chemical, and marine environments where both mechanical performance and resilience against harsh conditions are crucial. With state-of-the-art manufacturing facilities and rigorous quality control measures, Njabulo Stainless ensures that their precision-engineered nuts meet international standards, providing dependable and enduring fastening solutions for machinery, equipment, and structural assemblies.
These Stainless Steel 348 Nuts are primarily made up of iron, chromium (17–19%), nickel (12–14%), along with trace amounts of manganese, silicon, and a maximum of 0.08% carbon. This particular grade of austenitic stainless steel is known for its high tensile strength, good toughness, and outstanding resistance to intergranular corrosion, especially in welded parts. These nuts typically have a tensile strength ranging from about 700 to 900 MPa, a yield strength of around 400 to 650 MPa, and good elongation properties, making them perfect for high-stress fastening tasks in corrosive and high-temperature settings.
| 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 are ideal for high temperature applications. Available in sizes from M6 to M36, these nuts are highly resistant to corrosion and oxidation, making them suitable for nuclear reactors and chemical devices.
The stainless steel 348 coupling nuts are designed to connect threaded rods in harsh environments. Sizes range from M6 to M36, making them ideal for applications in hot and humid environments, such as medical plants and power plants
Stainless steel 348 nylon insert nuts have nylon inserts for secure fastening. Available in sizes from M6 to M24, they offer high thermal stability and resistance, suitable for use in aerospace and industrial equipment.
Stainless steel 348 flange hex nuts for enhanced weight distribution with integrated flanges. Available in sizes from M6 to M24, these panels are used in complex applications such as furnace components and heat exchangers, providing strong support.
Heavy duty stainless steel 348 hex nuts are designed for high stress and high temperature environments. Available in sizes from M6 to M36, they are ideal for use in industrial equipment and nuclear reactors, providing exceptional strength and durability.
Stainless steel 348 square nuts provide large surface area for efficient torque application. Sizes range from M6 to M24, making it suitable for secure communications in hot environments, such as chemical applications and space applications.
Njabulo Stainless delivers quality Stainless Steel 348 Nuts with consistent performance, as tested under wide-ranging tests like hardness tests, spectro analysis, PMI, and flaring tests. In addition, micro and macro tests, pitting resistance, and IGC tests confirm that the nuts are of superior quality that we deliver. We ensure complete documentation, such as commercial invoices, packing lists showing net and gross weights, box numbers, and labels besides our testing protocols. Our legalized or attested Certificate of Origin along with Third-Party Inspection Certificates ensures our uncompromising commitment to delivering exceptional products and unparalleled customer satisfaction.
Stainless Steel 348 Nuts find their place in various industries that demand corrosion-resistant and high-strength fasteners. They are particularly well-suited for chemical and petrochemical plants, marine equipment, industrial machinery, power generation, and structural assemblies that face oxidizing or mildly aggressive environments. Moreover, they are commonly used in piping systems, heat exchangers, and pressure vessels. Thanks to their blend of durability, corrosion resistance, and mechanical reliability, 348 nuts are a go-to choice for critical industrial, marine, and high-performance applications.
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