Stainless Steel 347 and 347H Seamless Pipes

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Stainless Steel 347and 347H Seamless Pipes Manufacturer, Supplier and Exporter in Hamilton, New Zealand

Blundell Pipes and Tubes, located in Hamilton, New Zealand, stands out as a top manufacturer and supplier of high-quality stainless steel seamless pipes. The company focuses on producing premium Stainless Steel 347 and 347H seamless pipes, designed for tough industrial applications where strength, reliability, and resistance to corrosion are crucial. Renowned for their precision manufacturing and commitment to international standards, Blundell Pipes and Tubes caters to various sectors, including chemical processing, petrochemical, power generation, and engineering. With a wealth of technical expertise and tailored solutions, the company guarantees that their seamless pipes meet stringent specifications, ensuring long-lasting durability and operational efficiency for essential industrial systems.

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The Stainless Steel 347 and 347H Seamless Pipes are made from a titanium-stabilized austenitic stainless steel blend that includes chromium, nickel, and titanium. The 347H variant features a higher carbon content, which enhances its high-temperature strength and creep resistance. Both grades excel in resisting intergranular corrosion, oxidation, and pitting in harsh environments. On the mechanical side, these pipes offer high tensile and yield strength, toughness, and excellent fatigue resistance, all while ensuring good weldability and machinability. Their seamless design guarantees dimensional stability, uniform wall thickness, and reliable performance in high-pressure and high-temperature settings.

Stainless Steel 347 and 347H 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 347 and 347H Seamless Pipes

STANDARD	UNS	WERKSTOFF NR.
SS 347	S34700	1.4550
SS 347H	S34709	1.4961

347 and 347H Stainless Steel Seamless Pipes Chemical Composition

SS	347	347H
Ni	09 – 13	09 – 13
N	–	–
Cr	17 – 20	17 – 19
C	0.08 max	0.04 – 0.08
Si	1 max	0.75 max
Mn	2 max	2 max
P	0.045 max	0.045 max
S	0.030 max	0.03 max
OTHER	Nb=10(C+N) – 1.0	8xC min – 1.00 max

SS 347 and 347H Seamless Pipes Mechanical Properties

Grade	347 / 347H
Tensile Strength (MPa) min	515
Yield Strength 0.2% Proof (MPa) min	205
Elongation (% in 50mm) min	40
Hardness
Rockwell B (HR B) max	92
Brinell (HB) max	201

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 347and 347H Stainless Steel Seamless Pipes from Blundell Pipes and Tubes?

Stainless Steel 347 and 347H seamless pipes are austenitic chromium-nickel alloys that are stabilized with niobium (columbium) to prevent carbide precipitation. Typically, they contain 17–19% chromium, 9–13% nickel, and 0.5–1.0% niobium, with 347H featuring a higher carbon content to enhance high-temperature strength. These pipes boast impressive mechanical properties, including a tensile strength ranging from 515–750 MPa, yield strength of 205–275 MPa, and elongation of 35–45%. They offer exceptional creep resistance, thermal stability, and corrosion resistance, making them perfect for high-temperature and aggressive environments where maintaining structural integrity is vital.

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Largest 347and 347H Stainless Steel Seamless Pipes Supplier in Hamilton, New Zealand

Blundell Pipes and Tubes, one of the largest suppliers of Stainless Steel 347 and 347H Seamless Pipes in Hamilton, New Zealand, 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 347 and 347HSeamless Pipes

Grade	UNS No	Old British		Euronorm		Swedish SS	Japanese JIS
		BS	En	No	Name
347	S34700	347s31	58G	1.4550	X6CrNiNb18-10	2338	SUS 347

Types of 347 and 347H Stainless Steel Seamless Pipes

Are Custom Sizes Available for 347and 347H Stainless Steel Seamless Pipes?

Yes, we offer custom sizes for Stainless Steel 347and 347H Seamless Pipes to meet your specific requirements. Our team at Blundell Pipes and Tubes is committed to providing tailored solutions for all your Piping & tubing needs. For more details, contact us at sales@blundellpipes.co.nz.

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These Stainless Steel 347 and 347H Seamless Pipes find extensive use in boilers, heat exchangers, pressure vessels, and piping systems that operate at elevated temperatures. They are also essential in petrochemical and chemical plants, power generation facilities, and oil & gas operations where high-temperature corrosion resistance is crucial. Additionally, they are perfect for furnace components, industrial ovens, and high-temperature process piping that demand long-lasting strength and durability. Their blend of mechanical strength and high-temperature resistance makes them a go-to choice for many industrial applications.