Stainless Steel 321 and 321H Seamless Pipes

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Stainless Steel 321 and 321H Seamless Pipes Manufacturer, Supplier and Exporter in Cape Town, South Africa

Bosega Pipes and Tubes, located in Cape Town, South Africa, stands out as a trusted manufacturer and supplier of Stainless Steel 321 and 321H Seamless Pipes. These pipes are engineered to deliver high-performance solutions for applications that demand resistance to extreme temperatures and intergranular corrosion. With a focus on precision and rigorous quality control, Bosega’s seamless pipes are perfect for tough industrial sectors like aerospace, petrochemical, thermal processing, and power generation. Renowned for their consistent dimensional accuracy, strength, and excellent weldability, the 321 and 321H pipes comply with international standards, making them ideal for both high-pressure and high-temperature settings.

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Stainless Steel 321 is an austenitic stainless steel that’s stabilized with titanium, which effectively prevents carbide precipitation during welding and exposure to high temperatures. This characteristic gives it remarkable resistance to intergranular corrosion. On the other hand, 321H is a high-carbon variant of 321, specifically crafted to enhance creep strength and maintain structural stability at elevated temperatures exceeding 538°C (1000°F). Both grades boast impressive mechanical properties, good oxidation resistance, and outstanding performance in thermal cycling applications. The seamless design eliminates welded seams, which boosts strength and pressure resistance while minimizing the risk of failure in critical service environments.

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 Bosega Pipes and Tubes?

Stainless Steel 321 and 321H Seamless Pipes find extensive use in heat exchangers, furnace components, chemical processing equipment, aircraft exhaust systems, and thermal oxidizers. Their ability to retain strength and structural integrity under prolonged high-heat conditions makes them a dependable choice for applications where thermal fatigue is a significant concern. Plus, their corrosion resistance in acidic and mildly aggressive environments ensures they perform reliably in challenging conditions.

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Largest 321 and 321H Stainless Steel Seamless Pipes Supplier in Cape Town, South Africa

Bosega Pipes and Tubes, one of the largest suppliers of Stainless Steel 321 and 321H Seamless Pipes in Cape Town, South Africa, 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 Bosega Pipes and Tubes is committed to providing tailored solutions for all your Piping & tubing needs. For more details, contact us at sales@bosegapipes.co.za.

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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.