Grade 347 stainless steel is stabilized with columbium, which reduces chromium carbide formation during
welding and prolonged exposure to elevated temperatures. This gives 347 stainless steel pipes and tubes
better resistance to intergranular corrosion in demanding high-temperature applications. That single
detail is why a 347 stainless steel pipe continues to perform well after repeated heat cycles in furnace
lines, exhaust systems, and high-temperature process piping, where standard 304 or 316 would become
sensitized. This grade is listed under UNS S34700 and cross-referenced to 1.4550, and it is available in
both pipe and tube forms, including seamless and welded constructions, depending on the application and
required dimensions.
Goodluck Metal Corporation is a reputed and well-known industrial product manufacturer and supplier. We
supply, export, manufacture a wide range of flawless Pipes and Tubes like SS 316L, SS 304, SS 321, SS
317L, SS 304, etc. We distribute at a reasonable price our manufacture wide range of industrial products
to our client. We maintained product stocks to fulfilling client requirements in minimum time. We have a
standard shipping service for our clients.
Stainless Steel 347 Pipes and
Tubes is a stabilizing element. It possesses inter-granular corrosion resistance. It
actively resists all oxidize environment and serve life-long service. It also resists chromium carbide
precipitation. SS347 has slightly improved corrosion resistant compared to other alloys. It contains
excellent corrosion protection and resistivity. SS 347 Pipes and Tubes have properties
like good mechanical ability, the stability of the chemical composition, oxidation resistance,
ductility, surface finish, etc. Oil refineries, airplane exhaust stacks, fasteners, collectors rings,
annealing box, cover this is all standard mode of applications of welded Stainless Steel 347 Pipes and
Tubes.
Goodluck Metal Corporation manufactures products from installed latest modern equipment. We regularly
upgrade equipment and make proper use of them. Our Stainless Steel 347 Pipes and
Tubes are produced using high-quality raw materials. We have hardworking employees who
work with dedication and create the product by using prominent quality raw materials. We make proper use
of technology to manufacture not only standard products but also customize products as per client
requirements. We serve products national and international clients as well. We are concerned about our
clients and their needs. We never compromise and maintain our product’s integrity. Goodluck Metal
Corporation has readily maintained stocks of prominent products to fulfill urgent industrial demands.
Our well qualified professional team supervises the manufacturing process to assure high product
performance.
We, Goodluck Metal Corporation, conduct different destructive and non-destructive tests to verify the
quality of Stainless Steel 347 Pipes and Tubes and then send these for dispatching. We
offer proper packaging to serve damage-free products. Pipes and tubes are packed in a case and covered
with strips. These strips avoid the damage and help to lift the product quickly.
347 Stainless Steel Pipe and Tube Specifications
| Specifications |
ASTM A213, A312, A269, A358 / ASME SA213, SA312, SA269, 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 Tubes, Square Tubes, Rectangular Tubes, Coiled Tubes, "U" Shape, Pan Cake Coils,
Hydraulic Tubes |
| Length |
Single Random, Double Random & Required Length |
| End |
Plain End, Bevelled End, Threaded |
| Outside Finish |
2B, No.4, No.1, No.8 Mirror Finish for Stainless Steel Tubes, Finish as per customer
Requirements |
| Delivery Condition |
Annealed and Pickled, Polished, Bright Annealed, Cold Drawn |
Types of 347 Stainless Steel Pipes and Tubes
347 pipes and tubes are available in several manufacturing routes, each suited to a different
pressure, size, and finish requirement.
347 Stainless Steel Seamless Pipe: Features and Uses
Seamless construction removes the longitudinal weld seam and creates a continuous pipe structure,
making it suitable for demanding pressure and temperature applications. ASTM A312 covers this route,
and stock runs from small-bore instrumentation sizes up to 24-inch NB.
347 Stainless Steel Seamless Tubes for Industrial Applications
Seamless 347 stainless steel tubes are manufactured to provide consistent dimensions and are
commonly used in heat exchangers, instrumentation, and other high-temperature systems. The outside
diameter starts at 6.00 mm, and the wall thickness ranges from 0.3 mm.
347 Stainless Steel Welded Pipe: Construction and Applications
A 347 stainless steel welded pipe is rolled from a plate or strip and fused along a longitudinal
seam. ASTM A312 governs this form too, and it suits larger diameters where seamless production turns
impractical.
347 Stainless Steel Welded Tubes
The welded tube follows the same fusion process at smaller diameters, mostly for heat exchanger and
condenser service. Tight tolerance control after welding keeps the tube round, which matters once
tubes get expanded into tube sheets.
347 Stainless Steel EFW Pipes
Electric fusion welded (EFW) pipes are commonly used for larger-diameter applications where welded
construction is practical and economical, with plate rolling and submerged arc welding forming the
seam. ASTM A358 governs this construction for high-volume process lines.
347 Stainless Steel ERW Pipes and Tubes
Electric resistance welding fuses the seam through resistance heating rather than filler metal,
giving a thinner weld bead. This route covers small- to mid-range diameters that are commonly used
in general fabrication work.
Stainless Steel 347 Seamless Pipe
SS 347 Seamless Pipe
ASTM A312 TP347 Seamless Pipe
UNS S34700 Seamless Pipes
SS 1.4550 Seamless Pipe
ASME SA 312 TP 347 Seamless Pipes
Stainless Steel 347 Seamless Tubes
SS 347 Seamless Tubing
ASTM A213 TP347 Seamless Tube
UNS S34700 Seamless Tubes
SS 1.4550 Seamless Tubing
ASME SA 213 TP 347 Seamless Tubes
Stainless Steel 347 Welded Pipe
SS 347 Welded Pipe
ASTM A312 TP347 Welded Pipe
UNS S34700 Welded Pipes
SS 1.4550 Welded Pipe
ASME SA 312 TP 347 Welded Pipes
Stainless Steel 347 Welded Tube
SS 347 Welded Tubing
ASTM A269 TP347 Welded Tube
UNS S34700 Welded Tubes
SS 1.4550 Welded Tubing
ASME SA 269 TP 347 Welded Tubes
Stainless Steel 347 EFW Pipe
SS 347 EFW Pipe
ASTM A358 TP347 EFW Pipe
UNS S34700 EFW Pipes
SS 1.4550 EFW Pipe
ASME SA 358 TP 347 EFW Pipes
Stainless Steel 347 ERW Pipe
SS 347 ERW Pipe
ASTM A312 TP347 ERW Pipe
UNS S34700 ERW Tubes
SS 1.4550 ERW Tubing
ASME SA 269 TP 347 ERW Tubes
Equivalent Grades of 347 Stainless Steel Pipes and Tubes
| STANDARD |
WERKSTOFF NR. |
UNS |
JIS |
GOST |
EN |
| SS 347 |
1.4550 |
S34700 |
SUS 347 |
08Ch18N12B |
X6CrNiNb18-10 |
Chemical Composition of 347 Stainless Steel
| 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 |
Mechanical Properties of 347 Stainless Steel Pipes and Tubes
| 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 % |
Applications of 347 Stainless Steel Pipes and Tubes
Stainless steel 347 pipes and tubes are used in industrial systems that require resistance to
intergranular corrosion following welding or exposure to elevated temperatures. Stabilised with
niobium (also known as columbium), this grade is suitable for selected high-temperature service
conditions. Common applications include:
- Chemical and petrochemical processing: Process piping and equipment exposed to
elevated temperatures, subject to the corrosive medium and operating conditions.
- Heat exchangers and boilers: Tubes and piping in systems where thermal exposure
and resistance to sensitisation are important.
- Power generation: Selected high-temperature piping and equipment components.
- Aerospace and exhaust systems: Components exposed to elevated temperatures, where
the design and operating environment permit the use of 347 stainless steel.
- Furnace and refinery equipment: Piping and components requiring suitable
high-temperature performance and weld-related corrosion resistance.
The final grade selection should account for operating temperature, pressure, chemical
exposure, fabrication requirements and the applicable design code.
Testing and Inspection of 347 Stainless Steel Pipes and Tubes
Testing and inspection help verify that 347 stainless steel pipes and tubes meet the specified
material, dimensional and quality requirements. The inspection plan should be based on the applicable
product standard, purchase order and service conditions. Common checks may include:
- Chemical analysis: Verifies the material composition and the specified niobium
stabilisation.
- Mechanical testing: Evaluates required properties such as tensile strength and
elongation.
- Dimensional inspection: Checks outside diameter, wall thickness, length and
dimensional tolerances.
- Hydrostatic testing: Verifies pressure integrity where required by the applicable
specification.
- Non-destructive testing (NDT): Methods such as radiographic or ultrasonic testing
may be required depending on the product form and specification.
- Visual and surface inspection: Identifies visible defects and checks the condition
of the supplied material.
- Material traceability: Reviews material identification and the corresponding
mill test certificate.
Not every test applies to every pipe or tube. Testing requirements must be confirmed
against the relevant ASTM/ASME specification and purchase order. Proper packaging and material
identification should also be maintained during dispatch to reduce handling and transit damage.
Request a Quote for 347 Stainless Steel Pipes and Tubes
For a quotation, provide the required pipe or tube form, material grade, outside diameter or nominal
pipe size, wall thickness or schedule, length, quantity and applicable specification. Include any
required testing, inspection, end preparation or surface finish in the enquiry.
Goodluck Metal Corporation lists 347 stainless steel pipes and tubes in seamless and welded forms.
Availability, applicable documentation, pricing and delivery schedules should be confirmed against the
specific order requirements.
Contact the sales team with your technical specifications to
request a quotation for 347 stainless steel pipes and tubes.
Frequently Asked Questions About 347 Stainless Steel Pipes and Tubes
A 347 stainless steel pipe is a niobium-stabilised austenitic stainless steel pipe designed to resist intergranular corrosion after welding and elevated-temperature exposure.
Pipes are generally specified by nominal size and schedule, while tubes are specified by actual outside diameter and wall thickness.
Yes, 347 stainless steel pipes are available in seamless and welded forms, subject to applicable specifications and availability.
Common specifications include ASTM A312 for pipes and ASTM A213 for boiler, superheater and heat-exchanger tubes.
Selection depends on required diameter, wall thickness, pressure rating, operating conditions and applicable design specifications.
They are used in chemical processing, petrochemical plants, heat exchangers, power generation and selected high-temperature applications.
