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./p>
347 pipes and tubes are available in several manufacturing routes, each suited to a different pressure, size, and finish requirement.
347 Stainless Steel Seamless Pipes
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
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 Pipes
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 & 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.
Seamless Pipes
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
Seamless Tubes
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
Welded Pipes
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
Welded Tubes
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
EFW Pipes
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
ERW Pipes & Tubes
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
SS 347 Pipes & Tubes Equivalent Grades
STANDARD
WERKSTOFF NR.
UNS
JIS
GOST
EN
SS 347
1.4550
S34700
SUS 347
08Ch18N12B
X6CrNiNb18-10
SS 347 Pipes & Tubes 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 347 Pipes & Tubing 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 %
Applications of 347 Stainless Steel Pipes & Tubes
Stainless steel 347 pipes are used in furnace and firebox components, where sustained high heat exposure would sensitize lower grades within weeks. Heat exchanger tube bundles benefit from the same intergranular corrosion resistance, particularly in aerospace exhaust and afterburner parts. Chemical and petrochemical piping carrying acidic media at elevated temperatures is another common application, along with welded assemblies that need post-weld heat treatment. Refinery process lines and jet engine components round out the typical service list.
Testing, Inspection, and Packaging
Each batch goes through destructive and nondestructive testing before dispatch, covering macro and micro examination, chemical analysis, hardness checks, mechanical testing, hydrostatic pressure testing, radiography, flaring, flattening, PMI verification, and ultrasonic testing. Once testing clears, pipe and 347 stainless steel tube lengths get packed in cases and wrapped with protective strips, which limit transit damage and keep material ready for offloading at the site.
Request a Quote for 347 Stainless Steel Pipes & Tubes
Send pipe or tube dimensions, wall thickness, and the applicable standard, and we will confirm stock availability and lead time against current inventory. Mill test certificates ship with every order for full traceability. Goodluck Metal Corporation supplies 347 stainless steel pipe and tube ex-stock throughout India. Send a specification sheet to get pricing and delivery confirmed.
FAQs
A 347 stainless steel pipe is an austenitic stainless pipe that is stabilized with columbium, identified as UNS S34700 and equivalent to 1.4550. The columbium addition ties up carbon, so the material resists intergranular corrosion after welding or extended high-temperature exposure.
The pipe is specified by nominal bore and schedule, and is sized for pressure carrying and process flow. A tube is specified by its actual outside diameter and wall thickness, used mainly in heat exchangers and instrumentation where dimensional accuracy matters more than flow capacity.
Yes. Seamless 347 stainless steel pipe is produced under ASTM A312, and welded pipe is available under the same specification, with A358 covering larger diameter EFW construction.
Goodluck Metal Corporation supplies ASTM A213, A312, A269 and A358 and meets the equivalent material and testing requirements as ASME SA213, SA312, SA269 and SA358 specifications.
Outside diameter ranges from 6.00 mm up to 914.4 mm, with sizes up to 24-inch NB held in ex-stock. Wall thickness runs from 0.3 mm to 50 mm, covering schedules from SCH 5 through SCH XXS.
Furnace components, heat exchangers, aerospace exhaust systems, and chemical or petrochemical process piping account for most of the demand. High-temperature service, where weld sensitization is a concern, is where SS 347 pipes are specified over standard 304 or 316.
