Aditya Stainless stands out as a trusted manufacturer and supplier of Stainless Steel 321 Bolts right in Kolkata, India. We specialize in delivering robust and high-performance fastening solutions tailored for tough industrial applications. SS 321 is a titanium-stabilized austenitic stainless steel, celebrated for its remarkable resistance to intergranular corrosion, oxidation, and its strength at high temperatures. These bolts shine in environments like thermal processing, chemical industries, and aerospace systems, where temperatures often soar above 500°C. Crafted with precision and adhering to ASTM, ASME, DIN, and ISO standards, our SS 321 bolts ensure exceptional stability, weldability, and long-lasting performance even in corrosive and high-heat settings.
Stainless Steel 321 Bolts are made up of 17–19% chromium and 9–12% nickel, with titanium content that’s at least five times the carbon content for stabilization. This unique alloy boasts a tensile strength ranging from 515–750 MPa, a yield strength of about 205 MPa, and an elongation of 30–40%, all while maintaining its integrity at temperatures reaching up to 870°C (1600°F). The titanium stabilization effectively prevents carbide precipitation during welding, enhancing resistance to intergranular corrosion. These characteristics make SS 321 bolts perfect for high-temperature environments where mechanical strength and corrosion resistance are essential.
Material | Specification | Standards | Size | Length |
Stainless Steel 321 Bolts | ASTM, ASME and API | ASTM B 193 / ASME SB 193 | M02 to M30 | 3 mm To 200 mm |
| Element | SS 321 |
| 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 321 |
| 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 | – |
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Stainless Steel 321 bolts are high-performance fasteners known for their excellent oxidation and corrosion resistance at elevated temperatures. Ideal for aerospace, chemical processing, and industrial applications, they ensure durability and reliability.
Custom Stainless Steel 321 Hex Bolt is a conformable fastener with a hexagonal head, providing excellent resistance to temperature rise and corrosion, ideal for precision applications in aerospace and industrial applications
Stainless Steel 321 leg bolt features a unique leg design for enhanced stability, providing excellent high-temperature and corrosion resistance. It is ideal for securing components in demanding industrial and aerospace environments.
Stainless Steel 321 expansion anchor bolt is designed for anchoring in concrete or masonry, offering superior high-temperature and corrosion resistance. It expands upon installation, ensuring secure and reliable fastening in harsh conditions.
Stainless Steel 321 hex flange head bolt features a hexagonal head with an integrated flange, providing high-temperature and corrosion resistance. Ideal for secure clamping in industrial and aerospace applications.
Stainless Steel 321 full threaded bolts are high-temperature resistant fasteners with continuous threading. They offer excellent corrosion and oxidation resistance, making them suitable for demanding industrial and aerospace applications.
All the required documentation, which are commercial invoice, packaging list, heat treatment chart, and quality assurance plan are given with Our Stainless Steel 321 Bolts. Furthermore, NABL-approved lab test reports, MTC, PMI Test Certificates, radiography test reports, and Third-Party Inspection Certificates also accompany to guarantee international standards for quality and satisfaction of our valued customers.
Stainless Steel 321 Bolts find their place in various industries that demand heat and corrosion resistance, including chemical processing plants, oil refineries, power generation facilities, and aerospace systems. They are particularly suited for fastening components in furnaces, heat exchangers, thermal oxidizers, expansion joints, and exhaust manifolds, where thermal fatigue and scaling can be problematic. Thanks to their excellent weldability and resistance to stress corrosion cracking, SS 321 bolts are also utilized in pharmaceutical and food processing equipment, marine engineering, and piping systems that face exposure to harsh conditions.
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