Stainless Steel 347 and 347H Seamless Pipes

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Stainless Steel 347and 347H Seamless Pipes Manufacturer, Supplier and Exporter in Canberra, Australia

David Pipes and Tubes stands out as a top-notch manufacturer and supplier of stainless steel 347/347H seamless pipes, proudly based in Canberra, Australia. They specialize in delivering high-quality piping solutions that are built to thrive in tough, high-temperature, and corrosive environments. What sets their stainless steel 347/347H seamless pipes apart is the addition of niobium, which enhances their resistance to intergranular corrosion and carbide precipitation during welding or extended heating. Thanks to cutting-edge manufacturing techniques and rigorous quality control, David Pipes and Tubes guarantees products that are not only reliable and durable but also precisely engineered to meet international standards, making them perfect for industries like petrochemical, power generation, and aerospace.

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These stainless steel 347/347H seamless pipes are made up of chromium (17–19%), nickel (9–13%), and niobium (10×C to 1%), with the 347H variant featuring a higher carbon content for better strength at elevated temperatures. This blend of alloying elements gives them outstanding resistance to oxidation, corrosion, and creep when exposed to high heat. The pipes boast impressive mechanical properties, including a tensile strength of 515–700 MPa, yield strength of 205–275 MPa, elongation of 35–40%, and hardness below 90 HRB. This unique combination ensures they are durable, stable, and perform exceptionally well in both thermal and corrosive conditions.

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 David Pipes and Tubes?

Choosing Stainless Steel 347and 347H Seamless Pipes from David 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, David 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 347and 347H Stainless Steel Seamless Pipes Supplier in Canberra, Australia

David Pipes and Tubes, one of the largest suppliers of Stainless Steel 347 and 347H Seamless Pipes in Canberra, Australia, 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 David Pipes and Tubes is committed to providing tailored solutions for all your Piping & tubing needs. For more details, contact us at sales@davidpipes.com.

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Stainless steel 347/347H seamless pipes are commonly used in situations where they face continuous high temperatures and corrosive substances. They are perfect for applications like heat exchangers, boilers, furnace tubes, exhaust manifolds, and pressure vessels in chemical, refinery, and power generation facilities. Their excellent weldability and resistance to intergranular corrosion make them ideal for high-temperature steam service and aerospace uses. Plus, the seamless design guarantees leak-proof performance and a long service life, making these pipes a go-to choice for critical industrial operations that demand strength and reliability.