Home > Stainless Steel > Stainless Steel 321 and 321H Welded Tubing
Samia Pipes and Tubes is a reliable manufacturer and supplier of Stainless Steel 321 / 321H Welded Tubing, operating from Tunis, Tunisia. The company produces tubing using advanced welding technology and strict quality standards to ensure consistent strength, dimensional accuracy, and surface finish. Stainless Steel 321 and 321H welded tubing is known for its excellent resistance to intergranular corrosion and strong performance at elevated temperatures. Samia Pipes and Tubes supplies these tubes to industries that demand durability, thermal stability, and long service life in high-temperature and corrosive operating environments.
4Stainless Steel 321 / 321H Welded Tubing is an austenitic stainless steel stabilized with titanium, which prevents carbide precipitation during high-temperature exposure. Grade 321H has a higher carbon content, providing improved creep resistance and enhanced strength at elevated temperatures. These alloys contain chromium and nickel for corrosion resistance and oxidation stability. The tubing exhibits good tensile and yield strength, excellent ductility, and toughness across a wide temperature range, along with outstanding weldability and resistance to thermal fatigue.
Welded Tubes Size : 1 / 8″ NB – 24″ NB
Specifications : ASTM A/ASME SA213, A249, A269, A312, A358
Standard : ASTM, ASME and API
Length : Single Random, Double Random & Required Length
Outer Diameter : 6.00 mm OD up to 914.4 mm OD, Sizes up to 24” NB
Thickness : 0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
Schedule : SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Types : Welded
Form : Round Tubes, Square Tubes, Rectangular Tubes, Coiled Tubes, “U” Shape, Pan Cake Coils, Hydraulic Tubes
End : Plain End, Beveled End, Treaded
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Fe |
| 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 |
| 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 % |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Choose Stainless Steel 321 and 321H Welded Tubing from Samia Pipes and Tubes for exceptional corrosion resistance, superior strength and excellent durability. Ideal for a variety of industrial applications it provides outstanding performance in harsh environments. With precision manufacturing and quality assurance, we ensure reliable and durable tubing solutions.
Samia Pipes and Tubes is the largest supplier of Stainless Steel 317 and 317L Welded Tubing in Tunis, Tunisia. Known for its high-quality products. We offer superior corrosion resistance, strength, and durability. Trusted by industries worldwide they provide reliable precision-engineered tubing for various applications and project needs.
| STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
| SS 321 | 1.4541 | S32100 | SUS 321 | X6CrNiTi18-10 |
| SS 321H | 1.4878 | S32109 | SUS 321H | X12CrNiTi18-9 |
Yes, Samia Pipes and Tubes offer large custom designs for Stainless Steel 321 and 321H Welded Tubing. With design, wall thickness and length. Their adjustable options ensure the tubing meets specific application requirements. This flexibility makes it more efficient and reliable for different industries and environments. For more details, contact us at sales@samiapipes.com.
Stainless Steel 321 / 321H Welded Tubing is widely used in applications involving high temperatures and continuous thermal cycling. Common uses include heat exchangers, furnace components, exhaust systems, expansion joints, and boiler tubing. These grades are also preferred in petrochemical plants, oil and gas processing units, power generation facilities, and aerospace applications. Their ability to maintain mechanical strength and resist oxidation makes them ideal for high-temperature piping systems, pressure vessels, and industrial equipment exposed to severe operating conditions.
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