Stainless Steel 347 Pipes in seamless, ERW and welded to ASTM A312. Compare quotes from verified suppliers on MetalMitra, with MTC 3.1 and worldwide delivery.
- Stainless Steel 347 Pipes
- SS 347
- Seamless
- ERW
- Welded
- EFW
- LSAW
- Niobium Stabilized
- High Temperature
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Specifications
| Material Grade | Stainless Steel 347 |
|---|---|
| Specifications | ASTM A213 / ASME SA213, ASTM A249, ASTM A269, ASTM A312 / ASME SA312, ASTM A358 Class I to V, ASTM A789 / ASTM A790 |
| Dimensions | ASTM, ASME and API |
| General Size | 1/8" NB to 30" NB |
| 347 Pipes & Tubes | 1/2" NB – 24" NB |
| ERW 347 Pipes & Tubes | 1/2" NB – 24" NB |
| EFW 347 Pipes & Tubes | 6" NB – 100" NB |
| Specialized In | Large Diameter Sizes |
| Thickness / Schedules | SCH20, SCH30, SCH40, STD, SCH60, SCH80, XS, SCH120, SCH140, SCH160, XXS |
| Type | Seamless / ERW / Welded / Fabricated / LSAW Pipes |
| Form | Round, Square, Rectangular, Hydraulic |
| Length | Single Random, Double Random & Cut Length |
| Ends | Plain End, Beveled End, Threaded End |
Grades & standards
- Stainless Steel 347
- ASTM A312
- ASTM A213
- ASTM A269
- ASTM A249
- ASTM A358
- ASTM A790
- ASTM A789
Chemical composition & mechanical properties
| C | Mn | P | S | Si | Cr | Ni | Nb |
|---|---|---|---|---|---|---|---|
| 0.08 | 2.00 | 0.045 | 0.030 | 0.75 | 17.0–19.0 | 9.0–13.0 | 10×C – 1.00 |
| Tensile strength, min | 515 MPa |
|---|---|
| Yield strength (0.2%), min | 205 MPa |
| Elongation in 50 mm, min | 40% |
| Hardness, max | 201 HBW |
Single values are maximums unless marked min. Values per ASTM A240 (plate, sheet and strip); always confirm against the purchase specification and the mill test certificate.
Need a dependable stainless steel piping? Stainless Steel 347 Pipes on MetalMitra come in seamless, ERW and welded to ASTM A312, ready for process, pressure and heat-transfer lines.
Stainless Steel 347 is a stabilized austenitic stainless steel grade containing niobium (columbium). The stabilization is intended to improve resistance to intergranular corrosion associated with sensitization during suitable elevated-temperature exposure.
SS 347 Pipes & Tubes are suitable for demanding applications involving elevated temperatures, thermal cycling and corrosive industrial environments. They are commonly considered for chemical processing, petrochemical, power generation, refinery and process equipment applications.
Available forms & variants
- SS 347 Seamless Pipes — High-integrity seamless pipes for demanding process applications.
- SS 347 ERW Pipes — Welded pipe configurations for industrial piping systems.
- SS 347 Welded Pipes — Available in various sizes and wall thicknesses.
- SS 347 EFW Pipes — Large-diameter pipe solutions for demanding industrial projects.
- SS 347 LSAW Pipes — Large-diameter longitudinally welded pipe configurations.
- SS 347 Tubes — Round, square, rectangular and hydraulic tube configurations.
Performance highlights
- Niobium Stabilized — Stabilized grade designed for demanding elevated-temperature service.
- High-Temperature Performance — Suitable for selected applications involving elevated service temperatures.
- Corrosion Resistance — Provides reliable resistance across a range of industrial environments.
- Excellent Fabrication — Suitable for industrial fabrication and engineering applications.
Typical applications
- Chemical Processing
- Oil & Gas
- Petrochemical
- Refineries
- Power Generation
- Heat Exchangers
- High-Temperature Equipment
- Marine Industry
- Pharmaceutical
- Food Processing
- Fertilizer Plants
- Nuclear Applications
- Process Equipment
- Pressure Vessels
Quality checks & certification
Every lot of Stainless Steel 347 Pipes sourced through MetalMitra can be inspected and documented to the governing standard and your purchase order.
- Dimensional & Visual Inspection
- Material Grade Verification
- Chemical Composition Verification
- Mechanical Property Testing
- Niobium Stabilization Verification as Applicable
- Non-Destructive Testing as Applicable
- Hydrostatic / Pressure Testing as Applicable
- Intergranular Corrosion Testing as Applicable
- EN 10204 3.1 Mill Test Certificate
- Customer-Specific Inspection Documentation
Why buy through MetalMitra
- Verified suppliers — Mills, manufacturers and stockists are reviewed by the MetalMitra team before they list.
- One RFQ, several quotes — Share size, grade and quantity once and compare offers side by side.
- Full traceability — Heat numbers, EN 10204 3.1 MTCs and third-party inspection on request.
- Delivered worldwide — Export-worthy packing and shipping to India, the Middle East, Africa, Europe and the Americas.
Ready to buy?
Send your size, grade, quantity and delivery location for Stainless Steel 347 Pipes, and matching suppliers on MetalMitra will come back with offers.
Technical note: Values on this page are for reference. Always confirm against the governing standard, your purchase specification and the mill test certificate.
Applications & industries
- Chemical Processing
- Oil & Gas
- Petrochemical
- Refineries
- Power Generation
- Heat Exchangers
- High-Temperature Equipment
- Marine Industry
- Pharmaceutical
- Food Processing
- Fertilizer Plants
- Nuclear Applications
- Process Equipment
- Pressure Vessels
- Oil & Gas
- Petrochemical & Refining
- Power Generation
- Chemical Processing
- Marine & Shipbuilding
- Pharmaceutical
- Food & Dairy
- Fertiliser
Testing & documents
Ask for the documents you need in your requirement — suppliers confirm them in their quotation:
- Mill test certificate to EN 10204 3.1, or 3.2 with third-party witness
- Third-party inspection (TPI) by SGS, Bureau Veritas, TÜV or your nominated agency
- Tests as the standard or your order requires: hydro, PMI, IGC, NDT, hardness or impact tests
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