Based in Chennai, India, Vinit Stainless is a well-known producer and supplier of premium stainless steel fasteners. Our speciality is stainless steel 309 bolts, which are made to perform exceptionally well in hot and slightly corrosive conditions. Our bolts meet international standards and are precision-engineered with cutting-edge technology to ensure long-lasting performance and dependability in demanding industrial applications. Vinit Stainless is dedicated to producing goods that are exceptional in terms of durability, strength, and resistance to oxidation. Our SS 309 bolts provide reliable fastening solutions supported by consistent quality and technical expertise, whether they are used in petrochemical units, power plants, or furnaces.
Approximately 22–24% chromium and 12–15% nickel make up stainless steel 309 bolts, which offer exceptional resistance to oxidation and high-temperature corrosion. They are stronger at higher temperatures because they contain more carbon than 309S. The material’s tensile strength is approximately 515 MPa, its yield strength is approximately 205 MPa, and its elongation is approximately 40%. Superior toughness and thermal stability are provided by the austenitic microstructure. Because of these characteristics, SS 309 bolts are appropriate for structural uses where high temperatures are present, like in industrial furnaces and heat treatment systems.
|
Material |
Specification |
Standards |
Size |
Length |
|
Stainless Steel 309 Bolts |
ASTM, ASME and API |
ASTM B 193 / ASME SB 193 |
M02 to M30 |
3 mm To 200 mm |
| Element | SS 309 |
| Tensile Strength (MPa) min | 480 |
| Yield Strength 0.2% Proof (MPa) min | 275 |
| Elongation (% in 50mm) min | 16 |
| Rockwell B (HR B) max Hardness | 95 |
| Brinell (HB) max Hardness | 201 |
| Element | SS 309 |
| Ni | 0.75 |
| C | 0.15 |
| Mn | 1.00 max |
| P | 0.04 max |
| S | 0.03 max |
| Si | 1.00 max |
| Cr | 11.5 – 13.5 |
| Mo | – |
| N | – |
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Stainless Steel 309 Bolts are fasteners with a high heat resistance that have good resistance to oxidation. They are perfect for severe environments and provide strength and reliability in mechanical and thermal conditions.
Stainless Steel 309 Bolts are Fasteners with a high heat resistance that have good resistance to oxidation. They are perfect for severe environments and provide strength and reliability in mechanical and thermal conditions.
Custom Stainless Steel 309 Hex Bolt is a high heat resistant fastener in the shape of a square head with a specific shape, making it strong and reliable for severe heat and difficult areas.
The stainless steel 309 expansion anchor bolt is high temperature fastening and is made use of when fixing concrete or masonry construction. When tight clamped the same expands on the hole. Ensures perfect gripping.
The stainless steel 309 hex flange head bolt offers a hex-head feature with built-in flanges. It thus spreads the load with more weights, providing increased weight distribution and good heat resistance for overheating applications.
Stainless Steel 309 Full Threaded Bolts have full threads along their length, providing consistent clamping force and resistance to heat. They are perfect for high-temperature applications where durability and reliable performance are expected.
Many industries that work in environments that are prone to oxidation and high heat stress use stainless steel 309 bolts. Combustion chambers, kiln liners, heat exchangers, furnace parts, and power plant machinery are among their main uses. These bolts are also used in thermal oxidisers, waste incinerators, and petrochemical processing. Even in settings with frequent thermal cycling, durability and performance are guaranteed by the high chromium and nickel content. SS 309 bolts are perfect for structural fastening in high-temperature industrial installations because of their exceptional mechanical strength and resistance to scaling at temperatures as high as 1000°C.
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