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Ramu Fasteners is a reputable manufacturer and supplier located in Hyderabad, specializing in high-quality Stainless Steel 309/309S Fasteners that are perfect for high-temperature and corrosive industrial settings. Known for their precision engineering and state-of-the-art manufacturing facilities, the company adheres to strict quality assurance protocols that meet international standards. Ramu Fasteners provides fasteners that excel in heat resistance, strength, and durability. They cater to various industries, including petrochemical, power generation, oil and gas, furnace manufacturing, and heavy engineering, all while ensuring timely delivery, competitive pricing, and dependable fastening solutions for long-lasting industrial performance.
The Stainless Steel 309/309S Fasteners are crafted from austenitic stainless steel, which contains significant amounts of chromium and nickel—typically around 22–24% chromium and 12–15% nickel. This unique blend offers outstanding oxidation and corrosion resistance, especially at high temperatures. The low-carbon 309S grade helps reduce carbide precipitation, enhancing weldability and resistance to intergranular corrosion. These fasteners boast impressive tensile and yield strength, high creep resistance, and remarkable toughness, ensuring consistent mechanical performance even under thermal cycling and prolonged high-temperature conditions.
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.
You’ll find Stainless Steel 309/309S Fasteners commonly used in environments that experience high temperatures and moderate corrosion. They’re often found in furnaces, heat exchangers, boilers, kilns, petrochemical plants, and power generation equipment. Additionally, they’re suitable for pressure vessels, refinery components, and high-temperature piping systems. Their ability to resist oxidation while maintaining strength at elevated temperatures guarantees secure fastening, reduced maintenance needs, and improved operational safety. Stainless Steel 309/309S Fasteners are the go-to choice for industrial applications that demand reliable performance under continuous heat and thermal stress.
At Ramu Fasteners, our commitment to quality is unwavering, as evidenced by the rigorous testing procedures applied to all Stainless Steel 309/309S fasteners before shipment. These advanced tests include hardness, chemical analysis by Spectro analysis, positive material identification (PMI), levelling, micro-macro, pitting resistance, fire and intergranular corrosion (IGC) testing. Furthermore, we offer third-party inspection certifications to ensure our fasteners are of the highest quality and reliable for demanding applications.
Ramu Fasteners is a leading manufacturer and supplier of high-quality fasteners in Hyderabad, India, with over 8 years of experience serving global industries.
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