Midland, UK-based Weston Stainless is a reliable source of high-quality stainless steel products with high-performance fastening solutions for diverse industries. Its products include the popular Stainless Steel 321H Bolts, famous for their resistance to corrosion as well as high-temperature strength. These bolts are classified under Grade 321H, a titanium-stabilized, high-carbon austenitic stainless steel, which promotes creep resistance and toughness. Coming in different forms, such as hex bolts, U-bolts, anchor bolts, and flange bolts, they are constructed from stainless steel material capable of withstanding harsh thermal environments, oxidation, and intergranular corrosion and are therefore well suited for stringent industrial applications.
Stainless Steel 321H Bolts contain chemical composition such as Chromium (17-19%), Nickel (9-12%), and Carbon (0.04-0.10%), along with Titanium (≥5xC) to inhibit carbide precipitation. The bolts possess tensile strength of 515 MPa, yield strength of 205 MPa, and elongation of 40%, providing exceptional mechanical performance. With a density of 7.9 g/cm³ and melting point of 1400-1425°C, they also demonstrate high thermal stability and find applications in high-temperature exposure under harsh conditions.
Material | Specification | Standards | Size | Length |
Stainless Steel 321H Bolts | ASTM, ASME and API | ASTM B 193 / ASME SB 193 | M02 to M30 | 3 mm To 200 mm |
| Element | SS 321H |
| 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 321H |
| 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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High-performance fasteners designed for high-temperature environments, offering exceptional resistance to oxidation and corrosion. Ideal for aerospace, chemical processing, and industrial applications requiring durability and reliability.
Custom designed fastener with a hexagonal head, designed for high temperature applications. It provides excellent corrosion resistance and strength, ideal for industrial, aerodynamic and aerospace applications.
Unique leg design for enhanced stability and support. It offers superior high-temperature and corrosion resistance, making it ideal for demanding industrial and aerospace applications.
Designed for anchoring in concrete or masonry, providing exceptional high-temperature and corrosion resistance. It expands upon installation for secure, reliable holding in harsh environments.
Connects the hexagonal head with an integrated flange, providing superior thermal corrosion resistance. Ideal for safe clamping in industrial and aerospace applications.
Continuous threading and excellent resistance to high temperatures and corrosion. They are ideal for securing components in demanding industrial, aerospace, and chemical processing environments.
Stainless Steel 321H Bolts are extensively utilized in heat exchangers, exhaust systems, boilers, and furnace components because of their resistance to high-temperature oxidation. They are critical in aerospace, petrochemical, power generation, and chemical processing applications, where thermal cycling and corrosive exposure is a risk. Their increased creep and stress rupture resistance make them suitable for steam piping, refinery equipment, and high-pressure applications, providing dependable fastening solutions for structural integrity under harsh conditions.
Weston Stainless offers Stainless Steel 321H Bolts with a certified test report to ensure mechanical properties, chemical composition, and conformance to international standards. They are packaged tightly in wooden crates, plastic boxes, or bespoke packaging to ensure protection from transit damage. Supplied in numerous sizes, threads, and coatings, full traceability is offered. On-time domestic and export deliveries are assured by Weston Stainless, which strictly enforces quality control standards to deliver high-performance bolts for heavy industrial usage.
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