Home > Stud Bolts > Stainless Steel 309 / 309s Stud Bolts
Mitchell Stainless, a trusted manufacturer and supplier in Hamilton, New Zealand, offers premium Stainless Steel 309 and 309S stud bolts designed for high-temperature and corrosion-resistant applications. These austenitic stainless steels feature excellent oxidation and scaling resistance, making them ideal for boilers, furnaces, heat exchangers, and other high-temperature industrial equipment. Mitchell Stainless ensures each stud bolt meets strict quality standards, providing precise dimensions, consistent mechanical performance, and long-term reliability. 309 / 309S stud bolts are engineered to provide secure, durable fastening solutions in extreme environments where strength, thermal stability, and corrosion resistance are critical.
Stainless Steel 309 / 309S stud bolts are composed primarily of iron, with 23–25% chromium, 12–15% nickel, and small amounts of manganese, silicon, and carbon. The 309S variant has lower carbon content to minimize carbide precipitation and improve corrosion resistance after welding. This composition provides excellent high-temperature strength, oxidation resistance, and moderate corrosion resistance. The combination of chromium and nickel ensures toughness and durability under extreme thermal conditions, making 309 / 309S stud bolts suitable for industrial applications requiring reliable performance in high-temperature and oxidative environments.
|
Element |
Content (%) |
|
Iron, Fe |
60 |
|
Chromium, Cr |
24 |
|
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 |
Contact us to get a quick quote for your requirement.
At Mitchell Stainless, we are proud to be the largest supplier, manufacturer, and exporter of Stainless Steel 309 / 309s Stud Bolts in Hamilton, New Zealand. Our cutting-edge solutions cater to all your piping needs. With state-of-the-art production facilities strategically located in the New Zealand, we maintain a vast inventory of over 16,000 tons of premium-quality materials, ensuring we have the stock readily available to meet your demands.
Designed with threads on both ends, these stud bolts are ideal for applications requiring secure fastening from both sides. They offer excellent resistance to high-temperature environments and corrosion.
These stud bolts feature threaded ends for secure attachment, particularly suited for high-temperature and industrial applications. Stainless Steel 309S provides superior resistance to oxidation and scaling.
Made from Stainless Steel 309, these stud bolts provide excellent strength and resistance to heat and corrosion. Ideal for high-temperature settings, they ensure reliable performance in demanding environments.
Manufactured to meet DIN 1.4833 standards, these stud bolts are used in high-stress applications requiring resistance to extreme temperatures and corrosive environments. They offer robust performance and durability.
These stud bolts are crafted from UNS S30908, a material known for its excellent resistance to heat, oxidation, and corrosion. They are perfect for high-temperature applications in industries like power generation and chemical processing.
Featuring a flush head design, these stud bolts are ideal for applications where a smooth surface is required. Made from Stainless Steel 309S, they offer resistance to high temperatures and provide secure fastening.
Mitchell Stainless offers quality Stainless Steel 309 / 309S Stud Bolts with consistent performance, supported by a wide array of tests such as hardness testing, spectro analysis, PMI, and flaring tests. We conduct micro and macro tests, pitting resistance, and IGC tests to provide the best product in every order. Besides the rigorous testing process, we also offer full documentation, which provides our customers with commercial invoices, a packaging list with information of net weights and gross weight, the number of the boxes, and labels. Our legalized or attested Certificate of Origin along with Third-Party Inspection Certificates provides total assurance of our commitment to delivering premium products and unmatched customer satisfaction.
Stainless Steel 309 / 309S stud bolts are widely used in boilers, furnaces, heat exchangers, chemical processing equipment, and high-temperature piping systems where corrosion resistance and thermal strength are essential. Typical applications include fastening flanges, valves, pressure vessels, and other high-temperature industrial assemblies. They are also ideal for maintenance and repair projects requiring durable, high-temperature, and corrosion-resistant fasteners. In New Zealand’s industrial and fabrication sectors, 309 / 309S stud bolts are valued for producing secure, long-lasting assemblies that maintain mechanical integrity, thermal stability, and reliability under extreme operating conditions.
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