Stainless Steel 347 Pipes / Stainless Steel 347H Pipes Manufacturer and Supplier

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Stainless Steel 347 / 347H Pipes Surface Finish Characteristics & Compliance Standards

Stainless Steel 347 / 347H pipes have a reflective surface that is obtained by heat treatment but can have some slight cloudiness. Further buffing operations may be employed to make the surfaces more reflective, and such pipes can be used in cases when the use of the surface reflectivity and reflection finishes are needed. SS 347 and 347H pipes have been widely applied in chemical processing, food production, refrigeration and other industries because of their high quality and performance aspects.

These stainless steel pipes are exceptional in the resistance to corrosion, abrasion, crevice corrosion, and fatigue in high temperature conditions. In Metinox Overseas, the SS 347 and 347H pipes are fabricated under the strict National and International regulations. The qualified and competent personnel adheres to the commonly accepted manufacturing procedures and quality standards to maintain uniformity of performance, dimensional accuracy and durability of service. Due to the special corrosion resistance characteristics of the Stainless Steel 347 / 347H pipes, they are a reliable option to use in the case of critical industrial requirements.

Stainless Steel 347 / 347H Pipes Heat Resistance & Mechanical Performance

Stainless steel 347 pipes are highly applicable in components subjected to heating cooling cycles of services that are intermittent and with a temperature of between 800�F to 1600�F. Grade 347H pipes are particularly suggested in the applications where the repeated thermal exposure range varies between 427�C and 899�C. Alloy 347 pipes have greater creep strength and better stress rupture characteristics as compared to Alloy 304. The stainless steel 347H pipes are specifically applicable in service types of conditions where sensitization resistance and intergranular corrosion are vital. Components exposed to intermittent heating to 1500�F or so are usually made with SS 347 pipes, whereas pipes that have better mechanical stability within high-temperature operating environments are made with SS 347H pipes.

Inspection Procedures, Manufacturing Practices & Packaging at Metinox Overseas

In Metinox Overseas, the Stainless Steel 347 and 347H pipes are subjected to thorough quality checks, comprising of chemical analysis, mechanical tests, hardness tests, positive material identification (PMI), inter-granular corrosion tests, and other non-destructive tests when necessary. At the time of dispatch, all the test reports and material certifications are furnished making it fully traceable and compliant.

These SS 347H pipes are made of high quality raw materials and are made in a technologically advanced production plant with a high-quality machinery and precision tools. Our manufacturing processes are continuously enhanced in order to produce defect free, dimensionally accurate pipes with good surface finish. Vitreous steel 347 / 347H pipes are also well packed in the wooden boxes, crates or protective cartons to avoid damage during the process of transportation, to deliver customers safely and reliably.

347/347H Stainless Steel Pipe Price List 2025

Note: Prices are subject to change based on market fluctuations. Contact us for the latest quote.

Product Description	Price (USD/Kg)	Price (INR/Kg)
SS 347 Seamless Pipe	$4.50 - $6.00	?375 - ?500
SS 347H Seamless Pipe	$5.00 - $6.50	?415 - ?540
SS 347 Welded / ERW Pipe	$3.80 - $5.00	?315 - ?415
SS 347H Welded / ERW Pipe	$4.20 - $5.50	?350 - ?460

Types Of Stainless Steel 347/347H Pipes

Stainless Steel 347 Pipe / 347H Stainless Steel Pipe Specification

Our inventory covers a wide range of sizes and schedules, manufactured to meet stringent global quality standards.

Specification	Details
Specifications	ASTM A312, A358 / ASME SA312, SA358
Outside Diameter	6.00 mm OD up to 914.4 mm OD, Sizes up to 24" NB available Ex-stock, OD Size Steel Tubes available Ex-stock
Thickness Range	0.3mm � 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
Type	Seamless / ERW / Welded / Fabricated / CDW
Form	Round Pipes, Square Pipes, Rectangular Pipes
Length	Single Random, Double Random & Required Length
End	Plain End, Beveled End, Treaded
Outside Finish	2B, No.4, No.1, No.8 Mirror Finish for Stainless Steel Pipes, Finish as per customer Requirements
Delivery Condition	Annealed and Pickled, Polished, Bright Annealed, Cold Drawn
EN 10216-5	EN 10216 347/347H Seamless Steel Pipe, EN 10216-5 1.4550 / 1.4961 Seamless Steel Pipes for pressure purposes
EN 10217-7	EN 10217 347/347H Welded Steel Pipe, Steel EN 10217-7 1.4550 / 1.4961 Welded Pipes for pressure purposes

Stainless Steel UNS S34700 Pipe / Stainless Steel UNS S34709 Pipes Equivalent Grades

Global cross-references for international procurement and engineering compliance.

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

347 Stainless Steel Pipe and 347H Stainless Steel Pipe Chemical Composition

The defining characteristic of Grade 347 is the Niobium (Cb/Nb) content, which locks in corrosion resistance.

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

ASME SA312 SS TP347 Pipes / ASME SA312 SS TP347H Pipes Mechanical Properties

Tensile Strength	Yield Strength (0.2% Offset)	Elongation	Hardness Rockwell B (HR B) max	Hardness Brinell (HB) max
Psi � 75000, MPa � 515	Psi � 30000, MPa � 205	35 %	92	201

AISI 347H Schedule 40 Pipe Pressure Ratings

The following data outlines the allowable working pressure (PSI) for Grade 347H at various temperatures.

Stainless Steel 347H Welded Tube Tolerance

Metinox Overseas ensures high precision in manufacturing to meet tight project tolerances.

Nominal Pipe Size Designator	Permissible Variations in Outside Diameter Over In.	Permissible Variations in Outside Diameter Under In.
1/8 to 1-1/2, incl	1/64 (0.015)	1/32 (0.031)
Over 1-1/2 to 4, incl	1/32 (0.031)	1/32 (0.031)
Over 4 to 8, incl	1/16 (0.062)	1/32 (0.031)
Over 8 to 18, incl	3/32 (0.093)	1/32 (0.031)

Applications & Uses of SS 347/347H Pipe

The niobium-stabilized chemistry of SS 347 and 347H pipes implies them as the main solution in the environment where the high-temperature operation and sensitization is not an option. The design of these pipes ensures that they do not experience any intergranular corrosion even at the extreme end of the carbide precipitation range.

Aerospace Industry

These are extensively used in the exhaust stacks of aircrafts, collector rings, jet engine and rocket engine components because they are more thermally stable.

Oil and Gas Refineries

It is good in high pressure steam pipes, refinery equipment and catalytic cracking units that contain hydrogen sulfide and high temperatures.

Chemical Processing

It is used in the processing of organic and inorganic chemicals especially in equipment that has heat exchangers and reactors.

Power Generation

Power plants with high creep and stress rupture strength require essentials of power generation such as boiler tubes, superheater tubes and high-pressure steam lines.

Automotive Industry

It is used in exhaust manifolds and turbocharger parts which are heavy duty and subject to extreme cycles of heat.

Heat Treatment Plants

Applied to high-heat gaskets, expansion joints and furnace components that need to withstand oxidation to a maximum temperature of 1600�F.

Why Choose Metinox Overseas?

Since Metinox Overseas is a highly specialized manufacturer of ASTM A312 TP347 and TP347H pipes, it has both technical knowledge and modern metallurgy to provide high quality piping solutions.

• Niobium Stabilization Mastery: We have an accurate control over Niobium to Carbon ratios so that our pipes are fully resistant to intergranular corrosion both during the welding process and during high-heat service.
• Extensive Testing: Each pipe is tested on a 10-point quality check; PMI (Positive Material Identification), Intergranular Corrosion (IGC) tests; according to ASTM A262 Practice E, and Hydrostatic testing.
• Inventory Level: We maintain an enormous stock of SS 347H Seamless Pipes of different schedules (SCH 40, 80, 160) and sizes to guarantee the shortest lead times on urgent project specifications.
• Custom Fabrication: We offer custom-made solutions, such as special lengths, finely beveling work, as well as special surface finishes (Mirror, 2B, No.4), which are based on client specifications.
• Certified Traceability: Our products are all supplied with 3.1/3.2 Mill Test Certificate (MTC) according to EN 10204 and this provides full transparency to international EPC contractors.

Looking for High-Quality Stainless Steel 347/347H Pipes?

Choose Metinox Overseas � Your Reliable SS 347/347H Pipe Manufacturer & Exporter.

Let us support your projects with quality, precision, and performance.

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Export Destinations - USA, Europe, Middle East, LATAM

We are a major exporter of SS 347/347H pipes to high-consumption regions:

• Middle East: UAE (Dubai, Abu Dhabi), Saudi Arabia (Riyadh, Jubail), Qatar, Oman, Kuwait.
• Americas (LATAM & USA): USA (Houston, New York), Brazil, Mexico, Argentina, Canada.
• Europe: Germany, Italy, UK, Netherlands, Belgium, France.
• Asia & Africa: Singapore, Malaysia, South Africa, Nigeria, Egypt, Thailand.

SS 347/347H Pipe Delivery Time & CIF Pricing by Country

The Metinox Overseas has established an effective global logistics network that has enabled it to supply ASTM A312 TP347/347H Pipes to its customers in a timely fashion all over the world. We have highly flexible INCOTERs that can be customized to suit your purchasing requirements including CIF (Cost, Insurance and Freight), FOB (Free on board), CFR (Cost and Freight) and DDP (Delivered Duty Paid). We have strategic alliances with shipping lines and other freight forwarders and this provides us with competitive freight rates and a consistent transit time to all ports in the world that are major.

Destination Region	Major Ports / Cities	Estimated Delivery Time	Typical CIF Terms
Middle East (GCC)	Dubai (Jebel Ali), Dammam, Doha, Muscat, Kuwait	7 - 10 Days	CIF Dubai / CIF Dammam / CIF Doha
Europe	Rotterdam, Hamburg, Antwerp, Southampton, Genoa	20 - 25 Days	CIF Rotterdam / CIF Hamburg
USA & Canada	Houston, New York, Los Angeles, Long Beach, Vancouver	25 - 30 Days	CIF Houston / CIF New York / CIF LA
Latin America (LATAM)	Santos (Brazil), Veracruz (Mexico), Buenos Aires, Callao	30 - 35 Days	CIF Santos / CIF Veracruz
Southeast Asia	Singapore, Port Klang, Bangkok, Manila, Jakarta	10 - 15 Days	CIF Singapore / CIF Port Klang
Africa	Lagos, Durban, Mombasa, Dar es Salaam, Alexandria	15 - 20 Days	CIF Lagos / CIF Durban

Note: The delivery time is approximated and may vary based on the shipping lines, congestion and the custom clearance process at the port. In case of immediate needs, we provide the air freight services with the delivery in 5-7 days to the largest international airports. Get in touch with our export department to have tailor-made logistics and prevailing CIF prices of SS 347 Seamless Pipes, SS 347H Welded Pipes and SS 347/347H ERW Pipes.

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Supplier and Exporter of SS 347 / 347H SS Pipes in Countries Like

Chile, Azerbaijan, Egypt, Puerto Rico, Turkey, Angola, Peru, Colombia, Italy, Bahrain, Hungary, Gabon, Iran, Austria, Hong Kong, Netherlands, Nepal, Russia, Czech Republic, United Arab Emirates, Nigeria, Spain, China, Macau, Germany, Canada, Argentina, Oman, Australia, Poland, Libya, Lithuania, Ukraine, Mexico, Kenya, Kuwait, New Zealand, Belgium, Kazakhstan, Qatar, Belarus, Mexico, Chile, Ecuador, Zimbabwe, Trinidad & Tobago, Tunisia, Israel, Bolivia, Saudi Arabia, Norway, Portugal, Ghana, Gambia, Venezuela, United Kingdom, South Africa, Bulgaria, Bhutan, Indonesia, Mongolia, Thailand, Romania, Poland, France, Greece, Switzerland, Vietnam, Singapore, Malaysia, Japan, Lebanon, Morocco, Iran, Afghanistan, Finland, Jordan, Sweden, Slovakia, Ireland, South Korea, Namibia, Costa Rica, Taiwan, Croatia, Iraq, United States, Yemen, Denmark, Serbia, Tibet, Sri Lanka, India, Nigeria, Algeria, Brazil, Bangladesh, Pakistan, Estonia, Philippines.

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