Njabulo Stainless is a top-notch manufacturer and supplier of Stainless Steel 347H Nuts, proudly based in Cape Town, South Africa. The company focuses on crafting high-quality austenitic stainless steel fasteners that boast impressive corrosion resistance, remarkable strength, and durability, especially in high-temperature settings. Their Stainless Steel 347H Nuts are designed with added carbon content, which enhances tensile strength and creep resistance, making them perfect for a variety of applications in industries like chemical, petrochemical, and power generation. With state-of-the-art manufacturing facilities and rigorous quality control measures, Njabulo Stainless ensures that their precision-engineered nuts meet international standards, providing reliable and long-lasting fastening solutions.
These Stainless Steel 347H Nuts are primarily made up of iron, chromium (17–19%), nickel (9–13%), niobium (as a stabilizer), and carbon (0.04–0.10%), along with trace amounts of manganese and silicon. The higher carbon content boosts their tensile strength and creep resistance at elevated temperatures, while the niobium stabilizer helps prevent intergranular corrosion during welding. These nuts typically have a tensile strength ranging from about 600 to 800 MPa, a yield strength of around 300 to 500 MPa, and they also exhibit good toughness and elongation, making them well-suited for high-stress fastening tasks in hot and corrosive environments.
| Specifications | : | ASTM A 193 ASME SA 193 |
| Standard | : | DIN, ASTM, BS and all International Standards |
| Length | : | 3 mm to 200 mm |
| Size | : | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Type | : | Hex Head nuts, Square nuts, Lock nuts, Eye nuts, wing nuts, T nuts, Panel Nuts, Coupling Nuts, Dome nuts, Acorn Nuts. |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 347H | min. | 0.04 | – | – | – | – | 17.0 | 3.00 | 9.0 | – |
| max. | 0.10 | 2.0 | 1.00 | 0.045 | 0.030 | 19.0 | 4.00 | 13.0 | – | |
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 347H | 515 | 205 | 40 | 92 | 201 |
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A corrosion-resistant product, Stainless Steel 347H nuts are available in sizes ranging from M6 to M64. They are designed for high-temperature applications, offering excellent creep resistance and stability in extreme conditions, suitable for aerospace and power generation industries.
A corrosion-resistant product, Stainless Steel 347H coupling nuts connect two male threads and come in sizes from M6 to M36. They provide high strength and thermal stability, making them ideal for high-temperature applications in industrial and aerospace settings.
A corrosion-resistant product, Stainless Steel 347H nylon insert nuts, or lock nuts, are available in sizes from M3 to M36. The nylon insert prevents loosening under vibration, providing reliable performance in high-temperature environments where stability and security are crucial.
A corrosion-resistant product, Stainless Steel 347H flange hex nuts feature a built-in washer-like flange and come in sizes from M5 to M20. They offer enhanced load distribution and stability in high-temperature applications, ensuring durability and reliability.
A corrosion-resistant product, Stainless Steel 347H heavy hex nuts are larger and thicker, available in sizes from M10 to M48. They provide increased strength and thermal stability, making them suitable for heavy-duty and high-temperature industrial applications.
A corrosion-resistant product, Stainless Steel 347H square nuts have a larger surface area for contact, available in sizes from M6 to M30. They are ideal for high-temperature applications that require secure fastening in confined spaces and robust performance.
Stainless Steel 347H Nuts are packed in heavy-duty materials such as wooden boxes and pallets to prevent the nuts from external damage. Our product is hand-packed, and hence the Nuts are free from scratches or dents. The finished product reaches the client in excellent condition, and customers are consistently satisfied and impressed by the performance and long-lasting features of the Stainless Steel 347H Nuts.
Stainless Steel 347H Nuts find their place in various industries that demand high-temperature corrosion resistance and mechanical stability. They are particularly well-suited for components in boilers, heat exchangers, superheaters, reheaters, pressure vessels, and piping systems within chemical and petrochemical plants. Moreover, they are utilized in marine and power generation equipment, as well as in industrial machinery that faces extreme thermal and corrosive conditions. Thanks to their blend of high strength, thermal stability, and corrosion resistance, 347H nuts are a go-to choice for challenging high-temperature and industrial applications.
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