Stainless Steel 309/309S Bolts are top-notch fasteners crafted for high-stakes environments where temperatures soar and corrosive conditions prevail. Made from heat-resistant stainless steel grades, these bolts excel in resisting oxidation and maintaining stability even when faced with thermal cycling. SS 309 boasts impressive strength and corrosion resistance, while SS 309S, with its lower carbon content, shines in weldability and minimizes carbide precipitation. Their remarkable ability to endure high temperatures makes Stainless Steel 309/309S Bolts a go-to choice for furnaces, heat exchangers, refineries, and industrial processing plants where durability and thermal resilience are non-negotiable.
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These bolts are made up of chromium (22–24%), nickel (12–15%), and low carbon levels in the 309S variant, which together enhance their oxidation resistance and high-temperature strength. They deliver a tensile strength of about 515–620 MPa and a yield strength of roughly 205 MPa, along with excellent creep resistance. The low carbon content in 309S helps prevent carbide formation during welding, ensuring the structural integrity remains intact. Both grades are stable at temperatures reaching up to 1000°C, making them perfect for extreme thermal conditions and chemically aggressive environments.
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Stainless Steel 310/310S Bolts Specification
| Grade | Stainless Steel 310, 310S |
| Specifications | ASTM A193 / ASME SA193, DIN, ASTM, BS and all International Standards |
| Length | 3mm to 200mm |
| Size | M 02 to M 160, Custom Sizes |
| Types | U- Bolts, J Bolts, Mushroom Head Square Neck Bolts, Bolts, Stud Bolts, Hex Head Bolts, Socket Hexagon Head Screw Anchor Bolt, T-Head Bolts, Eye Bolt, Foundation Bolts, Structural Bolts. etc |
Chemical Compositions of
Stainless Steel 310/310S Bolts
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
SS 310 | 0.015 max | 2.0 max | 0.15 max | 0.020 max | 0.015 max | 24.00 – 26.00 | 0.10 max | 19.00 – 21.00 | 54.7 min |
SS 310S | 0.08 max | 2.0 max | 1.00 max | 0.045 max | 0.030 max | 24.00 – 26.00 | 0.75 max | 19.00 – 21.00 | 53.095 min |
Stainless Steel 310/310S Bolts Mechanical Properties
| Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 310/310S | 7.9 g/cm3 | 1402 °C (2555 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 40 % |
Stainless Steel 310/310S Bolts
Types
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Stainless Steel 310/310S Bolts Uses
Stainless Steel 309/309S Bolts find their place in high-temperature applications like furnaces, kilns, heat exchangers, boilers, and refinery equipment. They’re also essential in thermal power plants, petrochemical units, and process industries where components face oxidation and thermal stress. Their durability and resistance to scaling make them ideal for securing parts in heating and exhaust systems. Plus, these bolts are well-suited for use in chemical processing equipment, incinerators, and high-temperature structural assemblies, ensuring they deliver long-lasting performance in demanding industrial settings.
