At Mitchell Stainless in Hamilton, New Zealand, we supply stainless steel fasteners that are built to handle extreme conditions with confidence. Our Stainless Steel 309S Bolts are specifically chosen for high-temperature environments where oxidation resistance and long-term stability are critical. Known for their reliability in heat-intensive applications, these bolts are supported by our strong commitment to quality and local service. The Mitchell Stainless team works closely with customers to ensure the right fastening solution is selected, providing products that perform consistently in challenging industrial settings.
Stainless Steel 309S Bolts are manufactured from an austenitic stainless steel alloy with high chromium and nickel content and a low carbon level. This composition provides excellent resistance to oxidation and scaling at elevated temperatures. The low carbon content helps reduce carbide precipitation during thermal cycling, improving stability. These bolts maintain good strength, toughness, and structural integrity under continuous heat exposure, making them suitable for high-temperature service where standard stainless grades may fail.
|
Material |
Specification |
Standards |
Size |
Length |
|
Stainless Steel 309S Bolts |
ASTM, ASME and API |
ASTM B 193 / ASME SB 193 |
M02 to M30 |
3 mm To 200 mm |
| Element | SS 309S |
| 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 309S |
| 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 | – |
Contact us to get a quick quote for your requirement.
Stainless Steel 309S bolts are high-temperature resistant fasteners with excellent corrosion resistance, ideal for extreme environments. They offer durability and strength for applications in industrial, aerospace, and chemical processing sectors.
Custom Stainless Steel 309S Hex Bolt is a precise, high heat resistant fastener with a square head, designed for precise applications that require excellent corrosion resistance and strength in harsh environments
Stainless Steel 309S leg bolt is a durable, high-temperature resistant fastener with a distinctive leg shape, ideal for securing components in demanding environments like industrial and aerospace applications.
Stainless Steel 309S expansion anchor bolt is a high-temperature resistant fastener designed for anchoring in concrete or masonry. It expands upon installation, providing strong, secure holding in harsh conditions.
Stainless Steel 309S hex flange head bolt features a hexagonal head with an integrated flange, offering high-temperature resistance and secure clamping in demanding applications, including industrial and structural uses.
Stainless Steel 309S full threaded bolts are high-temperature resistant fasteners with threads running the entire length, providing versatile applications in securing components and assemblies across industrial and aerospace environments.
We prioritize transparency and customer satisfaction by providing all necessary documentation at the time of delivery. This includes the commercial invoice, packaging list, heat treatment chart, quality assurance plan and the NABL-approved lab test report. Additionally, we offer further assurances with the Material Test Certificate (MTC), Positive Material Identification (PMI) Test Certificate, radiography test reports, and Third-Party Inspection Certificates, ensuring that you receive products of the highest quality and reliability.
Stainless Steel 309S Bolts are commonly used in high-temperature and heat-resistant applications. Typical uses include furnaces, kilns, heat treatment equipment, thermal processing systems, and petrochemical plants. They are also suited to power generation facilities and industrial exhaust systems. At Mitchell Stainless, we often supply 309S bolts for projects requiring reliable performance in extreme heat environments. Their strong oxidation resistance and durability make them a dependable fastening solution for demanding industrial and engineering applications.
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