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.
| Standard | ASTM A182 / ASME SA182 |
| Dimensions | ANSI/ASME B16.5, B 16.47 A & B, B16.48, BS4504, BS 10, EN-1092, DIN |
| Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges |
| Size | 1/2″ (15 NB) to 48″ (1200NB) |
| Class/Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 |
| Flange Face Type | Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
| SS 321 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 5(C+N) – 0.70 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1457 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
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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.
Used to seal the end of a piping system. Crafted from stainless steel, they provide a robust, corrosion-resistant solution for maintaining system integrity and pressure.
Leak-proof seal in high-pressure environments. Made from stainless steel, they feature a ring groove design for reliable, corrosion-resistant performance in demanding applications.
High strength and durability. They are ideal for demanding applications, offering excellent resistance to high temperatures, corrosion, and mechanical stress.
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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