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Lina Fasteners is a well-respected manufacturer and supplier located in Tunis, Tunisia, dedicated to providing reliable fastening solutions for industrial environments that face high temperatures and corrosive conditions. The company specializes in Stainless Steel 309/309S Stud Bolts, designed for exceptional strength, durability, and long-lasting performance even in the toughest operating conditions. With state-of-the-art manufacturing facilities, a skilled workforce, and rigorous quality assurance processes, Lina Fasteners guarantees adherence to international standards. Catering to sectors like petrochemical, power generation, construction, and heavy engineering, the company offers both standard and custom stud bolts, prioritizing precision, consistent quality, competitive pricing, and timely delivery to meet a variety of project needs across local and global markets.
Stainless Steel 309/309S Stud Bolts are crafted with higher levels of chromium and nickel, typically around 22–24% chromium and 12–15% nickel, which gives them outstanding resistance to oxidation and corrosion. The low-carbon 309S grade helps reduce carbide precipitation, enhancing weldability and resistance to intergranular corrosion. These stud bolts boast impressive tensile strength, high creep resistance, and maintain their mechanical stability at temperatures reaching up to about 1000°C. They resist scaling, thermal fatigue, and chemical attacks, ensuring reliable clamping force, dimensional stability, and a long service life in high-temperature, high-stress industrial settings.
Element | Content (%) |
Iron, Fe | 60 |
Chromium, Cr | 24 |
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 stud bolts are ideal for high-temperature corrosive environments, due to their excellent oxidation resistance. It is commonly used in industrial applications such as furnace components, heat exchangers and air filters where extreme temperatures are common. Their durability and resistance to scaling make them suitable for use in petrochemical, power, and chemical plants. Furthermore, they are used in high-temperature machines and equipment where power and reliability are critical for long-term operation.
Stainless Steel 309/309S Stud Bolts find extensive use in environments where they are subjected to high temperatures and corrosive conditions. Common applications include furnaces, heat exchangers, boilers, and kilns. They are frequently utilized in petrochemical plants, refineries, power generation facilities, and the cement industry. These stud bolts are ideal for ensuring secure connections in demanding situations, making them a go-to choice for engineers and manufacturers looking for reliable performance in challenging environments.
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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