Stainless Steel 321 and 321H ERW Pipes

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Stainless Steel 321 and 321H ERW Pipes Manufacturer, Supplier and Exporter in Hamilton, New Zealand

Blundell Pipes and Tubes, located in Hamilton, New Zealand, has built a solid reputation as a reliable manufacturer and supplier of top-notch Stainless Steel 321 and 321H ERW Pipes. Renowned for their precision engineering and dependable performance, they produce electric resistance welded (ERW) pipes that excel in resisting intergranular corrosion and perform exceptionally well at high temperatures. Thanks to their advanced manufacturing techniques and rigorous quality control, Blundell Pipes and Tubes guarantees that each product adheres to international standards. These ERW pipes are perfect for demanding sectors like petrochemical, power generation, aerospace, and chemical processing, offering durable, heat-resistant, and corrosion-resistant solutions.

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The Stainless Steel 321 and 321H ERW Pipes are made from titanium-stabilized austenitic stainless steel, which includes chromium, nickel, and titanium. The 321H variant, with its higher carbon content, offers enhanced high-temperature strength and creep resistance. Both grades excel in resisting intergranular corrosion, pitting, and oxidation, even in harsh environments. On the mechanical side, these pipes deliver high tensile and yield strength, toughness, and fatigue resistance, all while maintaining good weldability and machinability. Their ERW construction guarantees uniform wall thickness, dimensional stability, and reliable performance under high-pressure and high-temperature conditions.

Stainless Steel 321 and 321H ERW Pipes Specification

Specifications : ASTM A312 / ASME SA312

Dimensions : ASTM, ASME and API

Size : 8″ NB to 24″ NB

Wall Thickness : 0.5 to 150mm Thick

Schedules : SCH 5S, 10S,10, 20, 40S, 40, STD, 60, 80S, 80, XS, 100, 120, 140, 160 & XXS

Length : Single Random, Double Random & Required Length

Form : Round, Square, Rectangular, Hydraulic Pipes

End : Plain end, Bevelled end

Type : Electric Resistance Welded

321 and 321H Stainless Steel ERW Pipes Chemical Composition

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

SS 321 and 321H ERW Pipes Mechanical Properties

Tensile Strength	Yield Strength (0.2%Offset)	Elongation	Hardness
			Rockwell B (HR B) max	Brinell (HB) max
Psi – 75000, MPa – 515	Psi – 30000, MPa – 205	35 %	95	217

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 ERW Pipes from Blundell Pipes and Tubes?

The composition of Stainless Steel 321 and 321H ERW Pipes includes iron, chromium, nickel, and titanium, with a carefully managed carbon content—higher in 321H—to boost high-temperature strength. The addition of titanium helps prevent chromium carbide precipitation, enhancing resistance to intergranular corrosion. On the mechanical side, these pipes boast impressive tensile and yield strength, toughness, and outstanding creep resistance at elevated temperatures. They also feature excellent weldability, oxidation resistance, and thermal stability, making them ideal for critical applications that demand reliable performance under heat, pressure, and corrosive conditions.

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Largest Stainless Steel 321 and 321H ERW Pipes Supplier in Hamilton, New Zealand

Blundell Pipes and Tubes, a leading manufacturer and supplier of Stainless Steel 321 and 321H ERW Pipes in Hamilton, New Zealand, offers a comprehensive range of high-quality pipes and tubing suitable for various industrial applications. Our extensive inventory and commitment to exceptional service make us a trusted choice for regional products.

Equivalent Grades for SS 321 and 321H ERW Pipes

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

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Types of Stainless Steel 321 and 321H ERW Pipes

Are Custom Sizes Available for Stainless Steel 321 and 321H ERW Pipes?

Industries that require heat-resistant, corrosion-resistant, and high-strength piping solutions widely use Stainless Steel 321 and 321H ERW Pipes. They’re commonly found in boilers, heat exchangers, superheaters, and chemical processing systems. The petrochemical and power generation industries depend on them for steam lines, furnace components, and refinery pipelines. Additionally, the aerospace and marine sectors utilize 321 and 321H ERW pipes for structural components and high-temperature fluid transport. Their combination of mechanical properties and durability makes them a go-to choice for various applications.

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These Stainless Steel 321 and 321H ERW Pipes are widely utilized in boilers, heat exchangers, pressure vessels, and piping systems that operate at elevated temperatures. They are also essential in petrochemical and chemical plants, oil & gas refineries, and power generation facilities where corrosion resistance and durability at high temperatures are crucial. Furthermore, they are ideal for furnace components, industrial ovens, and high-temperature process piping that require long-lasting strength and reliability. Their unique combination of properties makes them a go-to choice for demanding applications.