Walid Stainless, headquartered in Tunis, Tunisia, is a trusted manufacturer and supplier of high-quality stainless steel tubing for demanding industrial applications. Their Stainless Steel 321H Tubing is specially developed for high-temperature service where strength, corrosion resistance, and long-term stability are essential. With higher carbon content and titanium stabilization, this tubing offers excellent resistance to carbide precipitation and improved creep strength at elevated temperatures. Manufactured with precision and strict quality control, Walid Stainless ensures consistent dimensions, smooth finish, and dependable performance. Customers rely on Stainless Steel 321H Tubing for safety, durability, and long service life.
Stainless Steel 321H Tubing is an austenitic stainless steel alloy containing approximately 17–19% chromium, 9–12% nickel, and higher carbon content, stabilized with titanium. The titanium prevents intergranular corrosion, especially after welding or prolonged heat exposure. This tubing typically exhibits tensile strength between 515–700 MPa and hardness around 170–200 HB. Its austenitic structure provides excellent toughness, corrosion resistance, and mechanical stability under continuous high-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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We ensures the highest standards for its stainless steel 321H tubing through rigorous testing and certification processes. Each tube undergoes a thorough evaluation, including hydrostability, chemical testing and mechanical testing. Certified to international standards such as ASTM and ASME, these containers provide reliability, durability and high performance in demanding industrial applications.
This tubing is available in sizes ranging from 1/8″ to 24″ in outer diameter. It offers 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.
Available in dimensions from 1/8″ to 36″ in outer diameter, this tubing is known for its 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
These tubes come in sizes from 1/4″ to 1″ in outer diameter, 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.
Offered in sizes from 1/8″ to 2″ in outer diameter, this tubing provides 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.
These tubes, ranging from 1/2″ to 5″ in outer diameter, are 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.
Fin tubes are available in sizes from 1/2″ to 2″ in outer diameter, 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.
Stainless Steel 321H Tubing is widely used in high-temperature and high-pressure applications. Common uses include heat exchangers, boiler tubes, exhaust manifolds, petrochemical processing units, power generation equipment, and furnace components. Its resistance to oxidation, thermal fatigue, and intergranular corrosion makes it ideal for welded assemblies and long-term heat exposure. Engineers and plant operators rely on 321H Tubing for reliable performance, safety, and extended service life. Walid Stainless ensures each tube meets strict quality standards, supporting dependable operation in demanding industrial environments.
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