Home > Stud Bolts > Stainless Steel 321 / 321H Stud Bolts
Harsh Metalloys stands out as a top manufacturer and supplier of Stainless Steel 321/321H stud bolts, proudly based in Mumbai, India. We specialize in high-performance fastening solutions designed to endure extreme temperatures, harsh environments, and mechanical stress. Our SS 321/321H stud bolts are made from top-quality raw materials and crafted using cutting-edge manufacturing techniques to meet international standards. With years of experience and a solid presence in the industry, Harsh Metalloys serves various sectors, including petrochemical, thermal processing, power generation, and aerospace. Our commitment to quality, prompt delivery, and customer satisfaction has established us as a reliable source for stainless steel fasteners both in India and around the world.
These Stainless Steel 321/321H stud bolts are produced from a titanium-stabilized austenitic stainless steel alloy, featuring 17–19% chromium and 9–12% nickel. The “H” variant has a higher carbon content, which enhances its creep resistance and strength at elevated temperatures. These bolts boast a tensile strength of about 515 MPa and a yield strength of roughly 205 MPa. They also show remarkable oxidation resistance up to 870°C, along with good toughness and weldability. SS 321/321H stud bolts retain their mechanical properties even under thermal cycling, making them perfect for high-temperature fastening applications.
| 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 % |
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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.
Harsh Metalloys 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.
You’ll find Stainless Steel 321/321H stud bolts commonly used in heat exchangers, pressure vessels, exhaust systems, furnace components, and chemical processing equipment. They are particularly well-suited for petrochemical plants, power generation facilities, refineries, and aerospace parts where resistance to oxidation, scaling, and thermal stress is crucial. These bolts guarantee long-term reliability in piping systems and flanged connections that face high temperatures and corrosive conditions. Their unique blend of strength, corrosion resistance, and thermal stability makes SS 321/321H stud bolts the go-to fastening solution for high-performance industrial applications.
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