Stainless Steel 321 and 321H Welded Tubing

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Stainless Steel 321 and 321H Welded Tubing Manufacturer, Supplier and Exporter in Hamilton, New Zealand

Blundell Pipes and Tubes, located in Hamilton, New Zealand, stands out as a top manufacturer and supplier of premium stainless steel tubing solutions. With a focus on precision-engineered products, the company provides an extensive selection of welded tubing, including Stainless Steel 321 and 321H, tailored for tough industrial applications. Known for its dedication to durability, corrosion resistance, and high standards, Blundell Pipes and Tubes caters to a wide range of clients in the manufacturing, chemical, and engineering fields. By emphasizing reliability, technical know-how, and personalized solutions, the company guarantees that clients receive tubing that adheres to strict international specifications and promotes long-term operational efficiency.

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321 and 321H Welded Stainless Steel Tubing are titanium-stabilized austenitic stainless steel types, with 321 having superior weldability and intergranular corrosion resistance, and 321H with added carbon content (0.10% max) for increased creep and elevated temperature strength. The two types contain 9–12% nickel and 17–19% chromium. The tubing has tensile strength of 515–750 MPa and yield strength of approximately 205 MPa. Welded fabrication enables economical manufacturing with sound structural integrity and corrosion resistance through 900°C temperatures.

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 Blundell Pipes and Tubes?

Stainless Steel 321 and 321H welded tubing are austenitic chromium-nickel alloys that are stabilized with titanium to avoid carbide precipitation. Typically, both grades contain 17–19% chromium, 9–12% nickel, and 0.5% titanium, with 321H featuring a higher carbon content for improved high-temperature strength. These tubes boast impressive mechanical properties, including tensile strength between 515–750 MPa, yield strength of 205–275 MPa, and elongation of 35–45%. They offer outstanding creep resistance, thermal stability, and durability, making them perfect for high-temperature and corrosive environments where maintaining structural integrity over time is essential.

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Largest Stainless Steel 317 and 317L Welded Tubing Supplier in Hamilton, New Zealand

Blundell Pipes and Tubes is the largest supplier of Stainless Steel 317 and 317L Welded Tubing in Hamilton, New Zealand. 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?

Stainless Steel 321 and 321H welded tubing find extensive use in industries that demand high-temperature performance and corrosion resistance. Typical applications include chemical processing, petrochemical plants, heat exchangers, boiler components, and exhaust systems. The enhanced stability of these grades allows for continuous operation at elevated temperatures, preventing intergranular corrosion and ensuring mechanical integrity. Furthermore, they are utilized in aerospace, power generation, and food processing equipment, where reliability under thermal stress is crucial.

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321 and 321H Welded Tubing Stainless Steel are frequently applied in heat exchangers, exhaust manifolds, furnace parts, as well as equipment for chemical processing. Grade 321 is utilized in applications that need resistance to carbide precipitation following welding, whereas 321H is applicable in high-temperature and high-pressure conditions that need higher mechanical strength. These welded tubes are suited for continuous service applications where corrosion resistance and thermal stability are imperative. They provide a safe answer to such applications involving thermal cycling, pressure fluctuation, and corrosive fluids or gases.