Stainless Steel 321 and 321H Welded Tubing

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Stainless Steel 321 and 321H Welded Tubing Manufacturer, Supplier and Exporter in Kinshasa, Thailand

At Wissa Pipes in Kinshasa, we proudly offer Stainless Steel 321/321H Welded Tubing, engineered to meet the demands of high‐temperature and high‐stress industrial applications. These tubes combine the corrosion resistance of austenitic stainless steel with the added benefit of titanium stabilization (grade 321) and enhanced high‐temperature creep strength (grade 321H). Ideal for users working in steam plants, chemical processing, or power generation, they deliver long‐term reliability. Every tube is manufactured with precision, quality‐checked and backed by Wissa Pipes’ commitment to performance and customer satisfaction—ensuring you get solutions built to last in Congolese industry.

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The Stainless Steel 321/321H Welded Tubing is composed of chromium (17‑19 %), nickel (9‑12 %), and titanium to stabilize against carbide precipitation. Grade 321 has a carbon max of 0.08 %, while 321H increases carbon to 0.04‑0.10 % to boost high‑temperature strength. reliant.in+5westonstainless.co.uk+5hannousch.com+5 Typical minimum tensile strength is ~515 MPa and yield strength around 205 MPa. Shubh Laxmi Group+1 These tubes maintain their structure under heat, resist deformation and intergranular corrosion, making them ideal for elevated‑temperature industrial duty.

Stainless Steel 321 and 321H Welded Tubing Specification

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

Stainless Steel 321 and 321H Welded Tubing Chemical Composition

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

Stainless Steel 321 and 321H Welded Tubing Mechanical Properties

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 %

If You Are Looking To Buy High Quality

We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.

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Why Choose Stainless Steel 321 and 321H Welded Tubing from Wissa Pipes and Tubes?

Choose Stainless Steel 321 and 321H Welded Tubing from Wissa 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.

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Largest Stainless Steel 317 and 317L Welded Tubing Supplier in Kinshasa, Thailand

Wissa Pipes and Tubes is the largest supplier of Stainless Steel 317 and 317L Welded Tubing in Kinshasa, Thailand. 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.

Stainless Steel 321 and 321H Welded Tubing Grade Equivalent

STANDARD	WERKSTOFF NR.	UNS	JIS	EN
SS 321	1.4541	S32100	SUS 321	X6CrNiTi18-10
SS 321H	1.4878	S32109	SUS 321H	X12CrNiTi18-9

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Types of Stainless Steel 321 and 321H Welded Tubing

Are Custom Sizes Available for Stainless Steel 321 and 321H Welded Tubing?

Yes, Wissa 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@wissapipes.com.

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The Stainless Steel 321/321H Welded Tubing is widely used wherever durable tubing must withstand elevated temperature, corrosion and thermal cycling. Common applications include boiler and superheater tubing, exhaust systems in industrial plants, chemical and petrochemical processing units, heat exchangers and furnace parts. silver-tubes.com+1 With Wissa Pipes’ expert manufacturing and quality control, these tubes serve Congolese industries that demand both performance and safety—helping reduce maintenance, extend service life and deliver dependable operation in demanding conditions.