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Lina Fasteners is a well-respected manufacturer and supplier based in Tunis, Tunisia, known for providing top-notch Stainless Steel 309/309S Bolts designed to withstand high temperatures and corrosive environments. Crafted under stringent quality standards, these bolts boast impressive oxidation resistance and mechanical stability, even at elevated temperatures. With cutting-edge manufacturing techniques and thorough inspection processes, Lina Fasteners ensures that each bolt meets precise dimensions, strength, and durability. Serving industries like petrochemical, power generation, furnace manufacturing, and oil & gas, Lina Fasteners is dedicated to delivering consistent quality, dependable performance, and timely delivery for critical industrial needs.
Stainless Steel 309/309S Bolts are austenitic alloys enriched with high levels of chromium and nickel, which grant them exceptional oxidation and heat resistance. The 309S grade, with its lower carbon content, minimizes carbide precipitation and enhances weldability. These bolts provide impressive tensile and yield strength, outstanding toughness, and resistance to scaling at high temperatures. They maintain their structural integrity under thermal stress, exhibit good ductility, and ensure reliable performance in both continuous and intermittent high-temperature service environments.
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 |
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
Stainless Steel 309/309S Bolts find extensive use in environments that experience high temperatures and harsh conditions. Common applications include components for furnaces, heat exchangers, boilers, exhaust systems, and high-temperature flanges. They are widely utilized in petrochemical plants, oil refineries, power generation facilities, and thermal processing equipment. Thanks to their excellent oxidation resistance, these bolts are ideal for kiln linings, burners, and heat treatment machinery. They provide secure fastening, a long service life, and dependable performance in demanding applications.
Lina Fasteners offers a full range of documentation, including our stainless steel 309/309S bolts, trademarks, packaging information, and quality certificates. We offer comprehensive test reports such as MTC per EN 10204/3.1b, PMI Testing, 100% radiography, and third-party inspections. These documents ensure transparency and the quality and compliance of our bolts, resulting in complete customer satisfaction.
Lina Fasteners is a leading manufacturer and supplier of high-quality fasteners in Tunis, Tunisia, with over 8 years of experience serving global industries.
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