Weston Stainless, located in Midland, UK, is a renowned high-quality stainless steel products supplier providing long-lasting and precision-designed solutions for industrial usage. Their Stainless Steel 321H Flanges are manufactured from a high-carbon type of SS 321, ensuring remarkable high-temperature strength, resistance to oxidation, and outstanding mechanical properties. These flanges are available in multiple shapes such as weld neck, slip-on, blind, socket weld, and threaded types to suit varied industrial requirements. Made from titanium-stabilized austenitic stainless steel, SS 321H flanges provide superior resistance to intergranular corrosion and thermal fatigue and are best suited for applications involving high stresses.
Stainless Steel 321H Flanges have 17-19% chromium, 9-12% nickel, and a more significant carbon content (0.04-0.10%) compared to SS 321, which makes them stronger and thermally stable. SS 321H flanges possess a tensile strength of 515 MPa, a yield strength of 205 MPa, and an elongation of 40%. The hardness is around 95 HRB. Physically, SS 321H is of density 7.9 g/cm³, melting point 1400°C, and thermal conductivity 16.3 W/m-K, providing outstanding durability, heat resistance, and mechanical stability in harsh environments.
| Specifications | ASTM A182 / ASME SA182 |
| Size | 1/8″ NB TO 48″ NB |
| Standards | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc. |
| Class / Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
| Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc. |
| Grades | S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61 |
| Grade | C | Mn | Si | P | S | Cr | N | Ni | Ti | SS 321H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 4(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 Flanges find extensive application in power generation, petrochemical, aerospace, and marine engineering industries. Their heat resistance and oxidation properties qualify them for use in heat exchangers, boiler fittings, exhaust systems, and furnace equipment. Their applications extend to pressure vessels, refinery fittings, and chemical plants where extreme heat and hostile chemicals must be resisted. They are a better option for the critical piping services used in high-temperature industrial processes due to their excellent weldability, endurance, and resistance to corrosion.
Available in sizes ranging from 1/2″ to 24″ and are designed for easy assembly without welding. They offer good resistance to oxidation and corrosion, making them suitable for various industrial applications.
Designed to fit inside a pipe for strong, reliable connections. They provide excellent resistance to high-temperature environments and corrosive substances.
Available in sizes from 1/2″ to 24″ and are used with a backing flange to allow for easy alignment and assembly. They offer high resistance to oxidation and corrosive elements, ideal for applications with frequent disassembly.
Weston Stainless offers test certificates, such as Mill Test Certificates (MTC) to EN 10204 3.1, guaranteeing global quality standards compliance. Flanges are protected in wooden crates, bubble wrap, or carton boxes to avoid damage during shipping. Weston Stainless ensures timely and secure worldwide delivery with an effective logistics network, fulfilling urgent industrial needs with accuracy and caution.
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