Stainless Steel 321 and 321H Seamless Pipes

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Stainless Steel 321 and 321H Seamless Pipes Manufacturer, Supplier and Exporter in Chennai, India

Vipul Pipes and Tubes is a reliable manufacturer and supplier of Stainless Steel 321 and 321H Seamless Pipes in Chennai, India, providing high-quality piping solutions for high-temperature and corrosive service applications. Stainless Steel 321 is titanium-stabilized austenitic steel with resistance to intergranular corrosion, and 321H is the high-carbon variant, with enhanced strength and creep resistance at elevated temperatures. Our seamless pipes are long-lasting, exact in dimensions, and capable of handling high pressure. Vipul Pipes and Tubes provides SS 321/321H seamless pipes to petrochemical, aerospace, chemical process, oil & gas, and thermal power plant industries.

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Stainless Steel 321/321H has 17–19% chromium, 9–12% nickel, with titanium being added (≥5×C%) for stabilization. 321H has higher carbon content (0.04–0.10%) for improved high-temperature strength. These seamless pipes have tensile strength of 515–750 MPa, yield strength of ≥205 MPa, and elongation of ≥35%. They have good resistance to oxidation and corrosion in temperatures up to 870°C. The smooth design provides even internal surfaces and equal wall thickness, appropriate for high-stress and high-temperature applications. The material is also weldable and formable, and it is best suited for applications involving pressure and structures.

Stainless Steel 321 and 321H Seamless Pipes Specification

Range : 6NB to 1200NB

Outer Diameter : 1/8″ NPS to 12″ NPS

Thickness : 0.6 mm to 12.7 mm

Schedules : SCH. 5, 10, 20, 30, 40, 60, 80, 100, 120, 140, 160, XXS.

Length : Single Random, Double Random & Cut Length

Specifications : ASTM A312 / ASTM SA312

Types : Round, Square, Rectangle, Hydraulic, Honed Tubes

End : Plain End, Beveled End

Equivalent Grades for Stainless Steel 321 and 321H Seamless Pipes

STANDARD	UNS	WERKSTOFF NR.
SS 321	S32100	1.4541
SS 321H	S32109	1.4878

321 and 321H Stainless Steel Seamless Pipes Chemical Composition

SS	321	321H
Ni	09 – 12	09 – 12
N	0.10	0.10
Cr	17 – 19	17 – 19
C	0.08 max	0.04 – 0.08
Si	1 max	0.75 max
Mn	2 max	2 max
P	0.040 max	0.045 max
S	0.030 max	0.03 max
TI	4(C+N)	0.70 max

SS 321 and 321H Seamless Pipes Mechanical Properties

Grade	321	321H
Tensile Strength (MPa) min	515	515
Yield Strength 0.2% Proof (MPa) min	205	205
Elongation (% in 50mm) min	40	40
Hardness
Rockwell B (HR B) max	95	95
Brinell (HB) max	217	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 321 and 321H Stainless Steel Seamless Pipes from Vipul Pipes and Tubes?

Choosing Stainless Steel 321 and 321H Seamless Pipes from Vipul Pipes and Tubes guarantees exceptional corrosion resistance and high temperature performance. Their pipes are manufactured to exacting standards, ensuring reliability and durability for complex applications. With a focus on customer service, Brydon offers customized solutions and technical support. In addition, the rugged design reduces leakage, making it reliable for a variety of applications.

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Largest 321 and 321H Stainless Steel Seamless Pipes Supplier in Chennai, India

Vipul Pipes and Tubes, one of the largest suppliers of Stainless Steel 321 and 321H Seamless Pipes in Chennai, India, offers a comprehensive range of high-quality pipes and tubes suitable for various industrial applications. Their extensive inventory and commitment to exceptional service make them a go-to choice for stainless steel products in the region.

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Grade specifications of SS 321 and 321H Seamless Pipes

Grade	UNS No	Old British		Euronorm		Swedish SS	Japanese JIS
Grade	UNS No	BS	En	No	Name	Swedish SS	Japanese JIS
321	S32100	321S31	58B, 58C	1.4541	X6CrNiTi18-10	2337	SUS 321
321H	S32109	321S51	–	1.4878	X6CrNiTi18-10	–	SUS 321H

Physical Properties of SS 321 and 321H Seamless Pipes

Grade	Density (kg/m3)	Elastic Modulus (GPa)	Mean Coefficient of Thermal Expansion (m/m/0C)			Thermal Conductivity (W/m.K)		Specific Heat 0-1000C (J/kg.K)	Electrical Resistivity (n.m)
			0-100°C	0-315°C	0-538°C	at 100°C	at 500°C
321	8027	193	16.6	17.2	18.6	16.1	22.2	500	720

Types of 321 and 321H Stainless Steel Seamless Pipes

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

Yes, we offer custom sizes for Stainless Steel 321 and 321H Seamless Pipes to meet your specific requirements. Our team at Vipul Pipes and Tubes is committed to providing tailored solutions for all your Piping & tubing needs. For more details, contact us at sales@vipulpipesandtubes.co.in.

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Stainless Steel 321 and 321H Seamless Pipes find extensive applications in the aerospace, chemical processing, and oil & gas sectors for continuous and intermittent high-temperature exposure systems. They are ideal for exhaust manifolds, heat exchangers, furnace components, and boiler tubes because of their high thermal stability. They find applications in superheaters and reheaters in refineries and power plants. Their weld resistance to intergranular corrosion is what makes them perfectly suitable for welded piping systems. They are also applied in pharmaceutical and food processing industries where thermal resistance as well as clean surface finish is needed.