Based in Chennai, India, Vinit Stainless is a top producer and supplier of stainless steel 321 bolts, catering to customers in the UAE and other countries. Premium-grade materials, which are renowned for their remarkable resistance to oxidation and corrosion at high temperatures, are used in the fabrication of our SS 321 bolts. These bolts are perfect for industrial systems, heat exchangers, and boilers because they perform dependably under challenging circumstances. Vinit Stainless is dedicated to providing strong, powerful stainless steel fasteners that meet the demands of diverse industrial applications, with an emphasis on quality control, accurate manufacturing, and client satisfaction.
321 Stainless Steel Bolts are stabilized with titanium (up to 0.7%) to increase resistance to intergranular corrosion, and their main constituents are 17–19% chromium and 9–12% nickel. At temperatures as high as 1500°F (815°C), this grade of austenitic stainless steel provides exceptional oxidation resistance, high tensile strength, and mechanical stability. It exhibits good creep resistance, thermal fatigue strength, and weldability. These bolts are designed to function in environments that are aggressive to heat and chemicals, preserving structural integrity in the face of high stress, thermal cycling, and corrosive exposure.
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.
Because of their exceptional thermal and chemical resistance, SS 321 bolts are frequently utilized in corrosive and high-temperature industrial settings. Boiler systems, industrial furnaces, heat exchangers, and aircraft exhaust manifolds are examples of common applications. These bolts function dependably in the presence of sulfur compounds and other aggressive agents in the petrochemical and chemical processing industries. They are also employed in the fields of power generation, oil and gas, and construction. They are perfect for long-term use in demanding mechanical and thermal systems because of their resistance to high pressure, corrosive media, and thermal cycling.
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