Home > Stud Bolts > Stainless Steel 321 / 321H Stud Bolts
Nakamura Stainless, located in Pulau Ujong, Singapore, is a well-regarded manufacturer and supplier of high-performance stainless steel components. This includes stainless steel 321 and 321H stud bolts. These stud bolts are designed for high-temperature service and provide excellent resistance to oxidation and intergranular corrosion. Stainless steel 321 is stabilized with titanium to prevent carbide precipitation. In contrast, 321H has a higher carbon content for better creep strength. Nakamura Stainless ensures precise machining and strict quality control, making these stud bolts perfect for heat-intensive industries like petrochemical, aerospace, and power generation.
Stainless steel 321/321H stud bolts contain 17 to 19% chromium, 9 to 13% nickel, and titanium, with 321H having more carbon for improved high-temperature strength. These bolts offer tensile strength between 520 and 750 megapascals and maintain their structure in temperatures up to 900°C. The titanium stabilization in 321 and the enhanced creep resistance of 321H enable these fasteners to function reliably in welded structures and under prolonged heat exposure. This reduces the risk of intergranular corrosion and thermal degradation.
| Grade | Stainless Steel 321 / 321h |
| 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 | Threaded Rod, Class A double ended stud, Tie Rod, Double Ended Stud, Stud Bolts, Bronze Hex Studs, Threaded Studs etc |
| Element | Ni | C | Mn | P | S | Si | Cr |
| SS 321 / 321h | 9.00 – 12.00 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0-19.0 |
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| SS 321 / 321h | 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 40 % |
Contact us to get a quick quote for your requirement.
These general-purpose stud bolts are known for excellent corrosion resistance and stability at high temperatures, suitable for diverse industrial applications.
Designed with a hexagonal head for easy installation, these bolts offer high strength and resistance to scaling and oxidation.
These fully threaded bolts provide uniform grip and strength, ideal for high-stress environments and precision applications.
Designed to anchor structures securely, these bolts resist corrosion and maintain durability in high-pressure and thermal conditions.
Engineered for exhaust systems, they provide excellent high-temperature resistance and withstand thermal cycling.
Used in heavy-duty wooden or masonry structures, these bolts combine corrosion resistance with exceptional durability.
Nakamura Stainless ensures stainless steel 321 / 321H stud bolt produced is quality-based and has appropriate testing under hardness, spectro analysis, PMI, flaring. Extended documentation is allowed in the invoice, details as related to packaging as well as its certificate of origin along with Third-party inspection certificate.
Stainless steel 321 and 321H stud bolts are used in various high-temperature and corrosion-sensitive environments. Common applications include heat exchangers, furnace components, exhaust systems, pressure vessels, and boiler equipment. These stud bolts are especially important in industries that need materials to withstand thermal cycling and welding, such as chemical processing, marine, oil and gas, and aerospace. Their strong combination of durability, corrosion resistance, and heat stability ensures reliable performance and secure fastening in tough service conditions.
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