Harshita Stainless, based in Delhi, India, stands out as a top manufacturer and supplier of Stainless Steel 321 Bolts. They’re recognized for delivering high-performance fastening solutions that cater to a variety of industrial needs. With a focus on heat-resistant and corrosion-resistant alloys, Harshita Stainless ensures their bolts meet international standards for strength, precision, and durability. These bolts are crafted to perform reliably even in high-temperature and corrosive environments. Committed to quality, customization, and timely delivery, the company supports diverse sectors like petrochemical, aerospace, automotive, and power generation, guaranteeing secure and long-lasting connections in critical operational systems.
Stainless Steel 321 is a titanium-stabilized austenitic stainless steel that contains about 17–19% chromium, 9–12% nickel, ≤0.08% carbon, and up to 0.7% titanium. The titanium helps improve resistance to intergranular corrosion during welding and exposure to high temperatures. SS 321 bolts boast a tensile strength of approximately 515–620 MPa, yield strength ranging from 205–275 MPa, and an elongation of 40–50%, with hardness between 80–85 HRB. These bolts are known for their excellent oxidation resistance and mechanical stability, making them suitable for continuous use in environments up to 870°C without losing strength or corrosion resistance.
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 are commonly utilized in high-temperature and welded applications where resistance to oxidation and intergranular corrosion is crucial. You’ll find them in exhaust manifolds, heat exchangers, furnace parts, expansion joints, and boiler components within the petrochemical and thermal processing industries. They’re also used in aerospace, automotive, and chemical processing equipment, particularly in situations where they’re constantly exposed to high heat and corrosive substances. Their outstanding weldability and thermal stability make them perfect for pressurized environments, ensuring reliability and performance in demanding applications.
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