Weston Stainless, Midland, UK-based, is a reliable manufacturer of high-quality stainless steel products, delivering long-lasting and high-performance solutions for industrial use. Its Stainless Steel 321H Tubing is a high-carbon version of SS 321, featuring higher strength, resistance to oxidation, and high performance at high temperatures. Coming in seamless, welded, round, and square forms, this tubing is made of titanium-stabilized austenitic stainless steel to provide resistance to intergranular corrosion and thermal fatigue. SS 321H tubing is extensively applied in high-temperature conditions where strength, durability, and corrosion resistance are critical for long-term efficiency.
Stainless Steel 321H Tubing contains 17-19% chromium, 9-12% nickel, and a higher carbon content (0.04-0.10%) than SS 321 for enhanced high-temperature performance. These tubes have a tensile strength of 515 MPa, yield strength of 205 MPa, and elongation of 40%. Their hardness is approximately 95 HRB. SS 321H physically possesses a density of 7.9 g/cm³, a melting point of 1400°C, and a thermal conductivity of 16.3 W/m-K, providing outstanding mechanical stability in harsh temperature conditions.
Standard ASTM A/ASME SA213/A249/A269/A312/A358 CL. I to V ASTM A789/A790
Dimensions ASTM, ASME and API
Range 1/2″ NB TO 24″ NB IN SCH 5, 10, 20, 40, STD, 60, 80, XS, 100, 120, 140, 160 & XXS as Per NACE MR 01 75
Thickness 0.3mm – 50 mm
Outer Diameter 6.00 mm OD up to 914.4 mm OD
Schedule SCH 10, SCH20, SCH30, SCH40, STD, SCH60, XS, SCH80, SCH120, SCH140, SCH160, XXS
Type Seamless / ERW / Welded/ Fabricated
Form Round, Square, Rectangular, Hydraulic, etc.
Length Single Random, Double Random & Cut Length
| Grade | C | Mn | Si | P | S | Cr | N | Ni | Ti |
| 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 |
| 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 |
| Element | Grade 904L |
|---|---|
| Density | 8 |
| Melting Range | 1300 -1390 ℃ |
| Tensile Stress | 490 |
| Yield Stress (0.2%Offset) | 220 |
| Elongation | 35% minimum |
| Hardness (Brinell) | – |
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Stainless Steel 321H Tubing finds extensive application in aerospace, petrochemical, power generation, as well as heat treatment industries. Due to its oxidation resistance and high-temperature strength, the tubing is perfectly suitable for furnace components, boiler tubes, exhaust systems, as well as heat exchangers. SS 321H tubing is also used in pressure vessels, chemical processing plants, and refinery equipment where exposure to corrosive materials as well as intense heat is prevalent. Its high weldability, toughness, and thermal stability make it an ideal material for demanding industrial processes.
Excellent corrosion resistance, especially against intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range of 427-816°C. Ideal for high-temperature applications requiring a continuous, strong, and uniform surface.
High resistance to stress and pitting corrosion. It’s frequently used in chemical processing and other high-temperature applications due to its robust performance under harsh conditions. The welding process ensures a strong, durable, and leak-proof seam
Designed for excellent thermal conductivity and corrosion resistance. Ideal for high-temperature and high-pressure environments, they are used in industries such as petrochemical and power generation. Their composition resists scaling and oxidation even at elevated temperatures.
Superior resistance to corrosion and high temperatures. It is used in precision instrumentation and control systems, ensuring reliable performance and accurate measurements. The tubing’s stability at high temperatures ensures minimal expansion and contraction.
Designed to withstand high-pressure and high-temperature environments typical in boiler systems. They offer excellent corrosion resistance, especially against steam and hot gases. Their durability ensures long service life and reliability in energy and industrial applications.
Available in sizes from 1/4″ to 1″ in outer diameter, U-tubes are essential for heat exchanger applications requiring a compact and efficient design. They provide excellent corrosion resistance and thermal stability, making them suitable for use in petrochemical, oil refining, and power generation industries. The U-shape allows for efficient heat transfer in limited spaces.
These tubes come in sizes ranging from 1/4″ to 1″ in outer diameter and are designed for use in condenser applications where efficient heat transfer and resistance to corrosion are critical. They are commonly used in power plants, HVAC systems, and refrigeration. The tubes ensure minimal fouling and scaling over prolonged use.
Designed to enhance heat transfer efficiency in various industrial applications. The addition of fins increases the surface area, improving thermal performance. These tubes offer excellent resistance to high-temperature oxidation and corrosion, making them ideal for heat exchangers and boilers.
Weston Stainless offers test certificates, such as Mill Test Certificates (MTC) according to EN 10204 3.1, to meet international quality standards. The tubing is carefully packed in wooden crates, plastic wrapping, or carton boxes to avoid damage during shipping. With a well-organized logistics system, Weston Stainless ensures timely and reliable global delivery, satisfying urgent industrial needs with precision and care.
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