Stainless Steel 321 and 321H Welded Pipes

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Stainless Steel 321 and 321H Welded Pipes Manufacturer, Supplier and Exporter in Naypyidaw, Myanmar

Tun Pipes, a top-notch manufacturer and supplier based in Naypyidaw, Myanmar, specializes in high-quality Stainless Steel 321 and 321H Welded Pipes. These pipes are specifically crafted for high-temperature, corrosion-resistant, and industrial applications. Built to comply with international standards, they boast impressive durability, tensile strength, and resistance to oxidation, intergranular corrosion, and stress corrosion cracking. Tun Pipes takes pride in their superior quality, achieved through advanced welding techniques, precise dimensional control, and thorough quality testing. This results in welded pipes that feature smooth finishes, consistent wall thickness, and dependable mechanical properties. You’ll find these pipes widely utilized in the petrochemical, chemical processing, power generation, and oil & gas sectors for critical high-temperature applications.

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The Stainless Steel 321 and 321H Welded Pipes are crafted from titanium-stabilized austenitic stainless steel, which includes chromium, nickel, and titanium. The 321H variant stands out with its higher carbon content, enhancing its high-temperature strength and creep resistance. Both grades are known for their excellent resistance to intergranular corrosion, oxidation, and pitting, even in harsh environments. On the mechanical side, these pipes deliver high tensile and yield strength, toughness, and fatigue resistance, all while ensuring good weldability and machinability. The welded design guarantees uniform wall thickness, dimensional stability, and reliable performance under high-pressure and high-temperature conditions.

Stainless Steel 321 and 321H Welded Pipes Specification

Specifications : ASTM A312 / ASME SA312

Outside Diameter : 6.00 mm OD up to 914.4 mm OD, Sizes up to 24″ NB available Ex-stock, OD Size available Ex-stock

Thickness : 0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS

Size : 1/2″ NB – 24″ NB

Type : Welded

Form: Round Pipes, Square Pipes, Rectangular Pipes.

Length : Single Random, Double Random & Required Length

End : Plain End, Beveled End, Treaded

Equivalent Grades for Stainless Steel 321 and 321H Welded Pipes

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

321 and 321H Stainless Steel Welded 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 Welded Pipes 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 321 and 321H Stainless Steel Welded Pipes from Tun Pipes and Tubes?

Choosing Stainless Steel 321 and 321H Welded Pipes guarantees excellent corrosion resistance, high strength, and durability. Designed for diverse industrial applications, it delivers reliable performance in tough environments while maintaining competitive pricing for cost-effective solutions.

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Largest 321 and 321H Stainless Steel Welded Pipes Supplier in Naypyidaw, Myanmar

Tun Pipes and Tubes, a leading manufacturer and supplier of Stainless Steel 321 and 321H Welded Pipes in Naypyidaw, Myanmar, 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.

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321 and 321H Stainless Steel Welded Pipe Sizes

NB Sizes	Sch 5	Sch 10	Sch 40	Sch 80	Sch 160
1/8″	✓	✓	✓	✓
1/4″	✓	✓	✓	✓
3/8″	✓	✓	✓	✓
1/2″	✓	✓	✓	✓	✓
3/4″	✓	✓	✓	✓	✓
1″	✓	✓	✓	✓	✓
1 1/4″	✓	✓	✓	✓	✓
1 1/2″	✓	✓	✓	✓	✓
2″	✓	✓	✓	✓	✓
2 1/2″	✓	✓	✓	✓	✓
3″	✓	✓	✓	✓	✓
4″	✓	✓	✓	✓	✓
5″	✓	✓	✓	✓
6″	✓	✓	✓	✓

Physical Properties of SS 321 and 321H Welded Pipes

Grade	Density (kg/m3)	Elastic Modulus (GPA)	Mean Co-eff of Thermal Expansion (µm/m/°C)			Thermal Conductivity (W/m.K)		Specific Heat 0-100°C (J/kg.K)	Elec Resistivity (nΩ.m)
			0-100°C	0-315°C	0-538°C	At 100°C	At 500°C
321 and 321H	8027	193	16.6	17.2	18.6	16.1	22.2	500	720

Types of 321 and 321H Stainless Steel Welded Pipes

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

We offer custom sizes for Stainless Steel 321 and 321H Welded Pipes to meet your specific needs. Our dedicated team at Tun Pipes and Tubes provides tailored solutions for all your piping and tubing requirements. For more information, contact us at sales@tunpipes.com.

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You’ll find Stainless Steel 321 and 321H Welded Pipes extensively used in boilers, heat exchangers, pressure vessels, and piping systems that operate at elevated temperatures. They’re also essential in petrochemical and chemical plants, oil & gas facilities, and power generation units that demand durable, corrosion-resistant, and heat-resistant piping solutions. Plus, they’re perfect for furnace components, industrial ovens, and high-temperature process piping where long-term strength and reliability are crucial. Their blend of mechanical strength and durability makes them a go-to choice for many industries.