Njabulo Stainless, located in Cape Town, South Africa, stands out as a top manufacturer and supplier of Stainless Steel 309 Nuts. Renowned for their precision engineering and impressive durability, these nuts are crafted to endure high temperatures and harsh environments. Built to comply with strict industrial standards, they guarantee secure and dependable fastening in critical applications. Commonly found in the chemical, petrochemical, and power generation sectors, 309 nuts are celebrated for their remarkable resistance to oxidation, scaling, and corrosion. Their exceptional strength, thermal stability, and longevity make them a go-to choice for engineers and maintenance professionals tackling tough industrial challenges.
Stainless Steel 309 Nuts are crafted from premium austenitic stainless steel, featuring 23–25% chromium, 12–14% nickel, and minimal carbon (≤0.08%). This unique blend offers remarkable resistance to high-temperature oxidation and corrosion while ensuring excellent mechanical properties. The typical tensile strength ranges from 515–720 MPa, with a yield strength of 205–310 MPa. These nuts showcase outstanding ductility, toughness, and thermal stability, allowing them to maintain their structural integrity even under extreme heat and mechanical stress, making them perfect for demanding industrial and high-temperature settings.
Element | Content (%) |
Iron, Fe | 60 |
Chromium, Cr | 23 |
Nickel, Ni | 14 |
Manganese, Mn | 2 |
Silicon, Si | 1 |
Carbon, C | 0.20 |
Phosphorous, P | 0.045 |
Sulfur, S | 0.030 |
Properties | Metric | Imperial |
Tensile strength | 620 MPa | 89900 psi |
Yield strength (@ strain 0.200%) | 310 MPa | 45000 psi |
Izod impact | 120 – 165 J | 88.5 – 122 ft-lb |
Shear modulus (typical for steel) | 77 GPa | 11200 ksi |
Elastic modulus | 200 GPa | 29008 ksi |
Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
Elongation at break (in 50 mm) | 45% | 45% |
Hardness, Brinell | 147 | 147 |
Hardness, Rockwell B | 85 | 85 |
Hardness, Vickers (converted from Rockwell B hardness) | 169 | 169 |
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An ideal corrosion resistant material for high humidity environments. Stainless steel 309 nuts are available in sizes from M6 to M36, perfect for furnace parts, heat exchangers and industrial applications requiring high thermal resistance.
Stainless steel 309 coupling nuts are used to connect threaded cables under high temperature conditions. Sizes range from M6 to M36, making them suitable for use in furnace parts and heat exchangers, providing durability and heat resistance.
Stainless steel 309 nylon insert nuts make nylon inserts flexible for secure fastening in high temperature environments. Available in sizes from M6 to M24, they are ideal for applications in heat exchangers and industrial furnaces where stability is required.
Stainless steel 309 flange hex nuts for enhanced weight distribution with integrated flanges. Sizes range from M6 to M24, suitable for high temperature applications such as furnace components and heat exchangers, providing both strength and thermal resistance
Heavy duty stainless steel 309 hex nuts are designed for high pressure, high temperature applications. Available in sizes from M6 to M36, they are used in industrial machinery and furnace components, and offer exceptional strength and heat resistance.
Stainless steel 309 square nuts provide large surface area for efficient torque application. Sizes range from M6 to M24, making them suitable for hot environments such as heat exchangers and furnace parts, making them strong and durable.
We ensure complete documentation for our Stainless Steel 309 Nuts to make them transparent and reliable. Documents include a commercial invoice, a packaging list, a fumigation certificate, a heat treatment chart, and a quality assurance plan. It is accompanied by an NABL-approved lab test report, which satisfies stringent standards. Our commitment to quality is supported by various test certificates, like MTC as per EN 10204/3.1b, PMI Test Certificate, 100% radiography test report, and a Third-Party Inspection Certificate. These measures will collectively guarantee 100% client satisfaction and confidence in the integrity of our products.
Stainless Steel 309 Nuts are perfect for fastening components in high-temperature and corrosive settings. They’re commonly used in furnace assemblies, heat exchangers, boilers, and gas turbines. Industries like chemical processing, petrochemical, and power generation depend on these nuts for secure, durable, and reliable connections in essential equipment. Moreover, they are also suitable for marine, pharmaceutical, and food processing applications where corrosion resistance, hygiene, and long-term reliability are crucial. Njabulo Stainless guarantees that each nut adheres to strict quality standards, ensuring top-notch performance in every application.
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