Stainless Steel 321 and 321H Seamless Pipes

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Stainless Steel 321 and 321H Seamless Pipes Manufacturer, Supplier and Exporter in Kuala lumpur, Malaysia

Maria Pipes and Tubes, located in Kuala Lumpur, Malaysia, has built a solid reputation as a reliable manufacturer and supplier of top-notch stainless steel piping solutions. Their Stainless Steel 321 and 321H Seamless Pipes are specifically crafted to withstand high temperatures and pressures, providing outstanding resistance to intergranular corrosion and oxidation. With a focus on precision and rigorous quality control, these seamless pipes are perfect for demanding sectors like petrochemical, aerospace, power generation, and chemical processing. Maria Pipes and Tubes guarantees that every product adheres to global standards for strength, durability, and reliability.

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Stainless Steel 321 and 321H Seamless Pipes are a type of stabilized austenitic stainless steel, featuring 17–19% chromium and 9–12% nickel, along with titanium (at least five times the carbon content) to prevent carbide precipitation during welding. The 321H variant boasts a higher carbon content (0.04–0.10%), which enhances its strength at high temperatures and improves creep resistance. These pipes deliver impressive mechanical properties, including tensile strength of up to 620 MPa, and they excel in resisting scaling at temperatures reaching up to 900°C.

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 Maria Pipes and Tubes?

You’ll often find Stainless Steel 321 and 321H Seamless Pipes in high-temperature applications like heat exchangers, pressure vessels, boiler components, exhaust systems, and equipment in chemical plants. Their excellent weldability and resistance to thermal fatigue make them a great choice for continuous operation in tough environments. The seamless design ensures consistent strength and integrity under pressure, making them ideal for critical systems that require long-lasting performance and resistance to corrosion and heat-related wear.

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Largest 321 and 321H Stainless Steel Seamless Pipes Supplier in Kuala lumpur, Malaysia

Maria Pipes and Tubes, one of the largest suppliers of Stainless Steel 321 and 321H Seamless Pipes in Kuala lumpur, Malaysia, 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 Maria Pipes and Tubes is committed to providing tailored solutions for all your Piping & tubing needs. For more details, contact us at sales@mariapipes.com.

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Stainless Steel 321 and 321H Seamless Pipes are widely used in various industries due to their excellent resistance to heat and corrosion. Typical applications include the aerospace industry, where it is used in aircraft exhaust systems and fuel lines. In the chemical industry, these pipes are ideal for dealing with corrosives. It is used in oil and gas pipelines, power plants and automotive exhaust systems. Their ability to withstand high temperatures makes them suitable for applications requiring high strength and power, and allows them to work for long periods in harsh environments.