SS 304 / 304L Welded Pipes: ASTM A312 / A358, ERW & EFW. Get quotes from verified suppliers on MetalMitra.
- SS 304 / 304L Welded Pipes
- Stainless Steel Welded Pipes
- ASTM A312 / A358
- ERW & EFW
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Specifications
| Standard | ASTM A312, A358, A778 / ASME SA312, SA358 |
|---|---|
| Grade | SS 304 (UNS S30400), 304L (UNS S30403) |
| Size | 1/2" NB to 48" NB |
| Schedule | 5S, 10S, 40S, 80S, STD, XS |
| Type | ERW, EFW, Welded |
| Length | Single random, double random, cut length |
| Ends | Plain end, bevelled end, threaded |
| Finish | Annealed & pickled, polished |
Grades & standards
- Stainless Steel 304
- Stainless Steel 304L
- ASTM A312
- ASTM A358
- ASME B36.19M
- EN 10217-7
Chemical composition & mechanical properties
| C | Mn | P | S | Si | Cr | Ni | N |
|---|---|---|---|---|---|---|---|
| 0.07 | 2.00 | 0.045 | 0.030 | 0.75 | 17.5–19.5 | 8.0–10.5 | 0.10 |
| 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.
| C | Mn | P | S | Si | Cr | Ni | N |
|---|---|---|---|---|---|---|---|
| 0.030 | 2.00 | 0.045 | 0.030 | 0.75 | 17.5–19.5 | 8.0–12.0 | 0.10 |
| Tensile strength, min | 485 MPa |
|---|---|
| Yield strength (0.2%), min | 170 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.
Source SS 304 / 304L Welded Pipes from verified manufacturers, mills and stockists on MetalMitra. Grade 304/304L is the most widely used austenitic stainless steel, offering good corrosion resistance and excellent weldability; 304L has lower carbon for welded construction.
Share your size, grade, quantity and delivery location once, and compare offers from suppliers who stock or manufacture SS 304 / 304L Welded Pipes to ASTM A312.
What you can source
- ERW Pipes — Electric resistance welded pipes for general and process piping.
- EFW Pipes — Electric fusion welded pipes for larger diameters and heavy walls.
- Welded Tubes — Thin-wall welded tubes for instrumentation and process lines.
- Polished Pipes — Mirror and satin finished pipes for sanitary and architectural use.
Key properties
- Corrosion Resistance — Performs reliably in water, chemical and food-grade service.
- Cost Effective — Lower cost than seamless pipe for most pressure ratings.
- Uniform Wall — Consistent wall thickness and tight dimensional tolerances.
- Easy Fabrication — Bends, welds and cuts without difficulty.
Applications & industries
- Process Piping
- Water Treatment
- Food & Dairy
- Pharmaceutical
- Chemical Plants
- Architectural & Railings
- Heat Exchangers
- General Engineering
Testing & documentation
Inspection and documentation for SS 304 / 304L Welded Pipes follow ASTM A312, A358 plus any extra requirements in your PO.
- Visual & dimensional inspection
- Hydrostatic test
- Eddy current / NDT test as applicable
- Flattening, flaring and bend tests
- Positive material identification (PMI)
- EN 10204 3.1 Mill Test Certificate
Why source on 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, test certificates and third-party inspection on request.
- Delivered worldwide — Export-worthy packing and shipping to India, the Middle East, Africa, Europe and the Americas.
Request pricing
Post an RFQ for SS 304 / 304L Welded Pipes with your drawing or specification and receive quotes from verified suppliers.
Technical note: Values on this page are for reference. Always confirm against the governing standard, your purchase specification and the test certificate.
Applications & industries
- Process Piping
- Water Treatment
- Food & Dairy
- Pharmaceutical
- Chemical Plants
- Architectural & Railings
- Heat Exchangers
- General Engineering
- Oil & Gas
- Petrochemical & Refining
- Power Generation
- Chemical Processing
- Water & Wastewater
- Pharmaceutical
- Food & Dairy
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
FAQs
ERW pipes are welded by electric resistance without filler metal; EFW pipes use electric fusion welding and are typically used for larger diameters.
Yes, ASTM A312 welded pipes are widely used for pressure piping when hydro-tested and inspected to the standard.
Mill, pickled, annealed, satin (No.4) and mirror polished finishes are common.
Need SS 304 / 304L Welded Pipes?
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