Stainless Steel 347 and 347H Welded Pipes

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Stainless Steel 347 and 347H Welded Pipes Manufacturer, Supplier and Exporter in Houston , USA

Liam Pipes and Tubes is a Houston, USA-based company that specializes in the production and supply of Stainless Steel 347 and 347H Welded Pipes. Both types of pipes are generally known for their high resistance to oxidation at elevated temperatures, intergranular corrosion, and weldability. Produced from the 347 and 347H alloys, which contain niobium as a stabilizing element, the pipes are suitable for use in the chemical, petrochemical, and power generation industries. Both strength and flexibility being offered, Stainless Steel 347 and 347H welded pipes are ideal for high temperature use and corrosive media environments.

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Stainless Steel 347 and 347H Welded Pipes have 17-19% chromium, 9-13% nickel, and 0.5-1.0% niobium, which enhances the resistance of the alloy to carbide precipitation at high temperatures. The 347H alloy contains more carbon than 347, which adds high temperature strength. Mechanical properties consist of a tensile strength of 520 MPa for 347 and 550 MPa for 347H, respectively, with a yield strength of around 205 MPa and 240 MPa. The alloys have good oxidation and corrosion resistance in harsh conditions, making them ideal for high-stress, high-temperature applications.

Stainless Steel 347 and 347H Welded Pipes Welded Pipe Specification

Specifications : ASTM A312 / ASME SA312

Outside Diameter : 6.00 mm OD up to 914.4 mm OD, Sizes up to 24″ NB available Ex-stock, OD Size available Ex-stock

Thickness : 0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS

Size : 1/2″ NB – 24″ NB

Type : Welded

Form: Round Pipes, Square Pipes, Rectangular Pipes.

Length : Single Random, Double Random & Required Length

End : Plain End, Beveled End, Treaded

Equivalent Grades for Stainless Steel 347 and 347H Welded Pipes

STANDARD	WERKSTOFF NR.	UNS	JIS	GOST	EN
SS 347	1.4550	S34700	SUS 347	08Ch18N12B	X6CrNiNb18-10
SS 347H	1.4961	S34709	SUS 347H	–	X6CrNiNb18-12

Stainless Steel 347 and 347H Welded Pipes Chemical Composition

Grade	C	Mn	Si	P	S	Cr	Cb	Ni	Fe
SS 347	0.08 max	2.0 max	1.0 max	0.045 max	0.030 max	17.00 – 20.00	10xC – 1.10	9.00 – 13.00	62.74 min
SS 347H	0.04 – 0.10	2.0 max	1.0 max	0.045 max	0.030 max	17.00 – 19.00	8xC – 1.10	9.0 -13.0	63.72 min

SS 347 and 347H Welded Pipes Mechanical Properties

Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
8.0 g/cm3	1454 °C (2650 °F)	Psi – 75000, MPa – 515	Psi – 30000, MPa – 205	35 %

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 347 and 347H Stainless Steel Welded Pipes from Liam Pipes and Tubes?

Choosing Stainless Steel 347 and 347H Welded Pipes guarantees excellent corrosion resistance, high strength, and durability. Designed for diverse industrial applications, it delivers reliable performance in tough environments while maintaining competitive pricing for cost-effective solutions.

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Largest 347 and 347H Stainless Steel Welded Pipes Supplier in Houston , USA

Liam Pipes and Tubes, a leading manufacturer and supplier of Stainless Steel 347 and 347H Welded Pipes in Houston , USA, offers a comprehensive range of high-quality pipes and tubing suitable for various industrial applications. Our extensive inventory and commitment to exceptional service make us a trusted choice for regional products.

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347 and 347H Stainless Steel Welded Pipe Sizes

NB Sizes	Sch 5	Sch 10	Sch 40	Sch 80	Sch 160
1/8″	✓	✓	✓	✓
1/4″	✓	✓	✓	✓
3/8″	✓	✓	✓	✓
1/2″	✓	✓	✓	✓	✓
3/4″	✓	✓	✓	✓	✓
1″	✓	✓	✓	✓	✓
1 1/4″	✓	✓	✓	✓	✓
1 1/2″	✓	✓	✓	✓	✓
2″	✓	✓	✓	✓	✓
2 1/2″	✓	✓	✓	✓	✓
3″	✓	✓	✓	✓	✓
4″	✓	✓	✓	✓	✓
5″	✓	✓	✓	✓
6″	✓	✓	✓	✓

Types of 347 and 347H Stainless Steel Welded Pipes

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

We offer custom sizes for Stainless Steel 347 and 347H Welded Pipes to meet your specific needs. Our dedicated team at Liam Pipes and Tubes provides tailored solutions for all your piping and tubing requirements. For more information, contact us at sales@liampipes.us.

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Stainless Steel 347 and 347H Welded Pipes are utilized in severe high-temperature environments like heat exchangers, chemical reactors, and turbines. These pipes are well suited for petrochemical, aerospace, and power generation industries where thermal cycling resistance, oxidation, and intergranular corrosion resistance are needed. Furnace components, reactor cores, and exhaust systems find 347 and 347H pipe high-temperature strength beneficial. Also, the pipes find application in steam boilers, condenser tube, and heat exchanger tubing, where long term resistance to corrosive gases and high temperature exposure is vital.