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Fasteners Mart, Mumbai, India, is a prominent producer and exporter of high-quality industrial fasteners catering to various industries worldwide. Some of our top-of-the-line products are Stainless Steel 309/309S Bolts, which are made from heat-resistant austenitic stainless steel. These bolts, produced using Grade 309 and 309S, provide exceptional corrosion resistance and good performance at elevated temperatures. Found in different shapes like hex bolts, carriage bolts, and U-bolts, they are best suited for applications where there is a need for strength, durability, and oxidation resistance in extreme or high-temperature applications.
Stainless Steel 309/309S bolts consist mostly of iron, with the presence of chromium (22–24%) and nickel (12–15%) as major alloying constituents. Grade 309S contains less carbon for enhanced weldability. The bolts have tensile strength of about 550 MPa and yield strength of about 205 MPa, along with 40% elongation. Physical properties consist of 7.9 g/cm³ density and a melting point of 1354°C to 1413°C. These properties exhibit very good thermal stability, corrosion resistance, and strength even upon extended exposure to high temperatures.
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 widespread use in resistance to high temperatures and corrosive environments. Petrochemical, power generation, furnace building, thermal processing, and exhaust systems are some common industries. They are best suited for structural assembly in heat exchangers, refineries, and chemical plants. Their thermal cycling and oxidation resistance make them a good choice for applications exposed to continuous heating and cooling, providing durability and long-term performance in adverse industrial conditions.
The Fasteners Mart provides safe and effective delivery of Stainless Steel 309/309S Bolts to domestic and international customers. Careful packaging is used in each shipment with materials like wooden crates, bubble wrap, and protective covering to prevent damage during shipping. Specialized packaging solutions are available to cater to individual customer needs.
The Fasteners Mart is a leading manufacturer and supplier of high-quality fasteners in Mumbai, India, with over 8 years of experience serving global industries.
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