Stainless Steel Welded Tubes: ASTM A249 / A269, 304, 316, 321. Get quotes from verified suppliers on MetalMitra.
- Stainless Steel Welded Tubes
- Stainless Steel Welded Pipes
- ASTM A249 / A269
- 304
- 316
- 321
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Specifications
| Standard | ASTM A249, A269, A270 / ASME SA249 |
|---|---|
| Grade | 304, 304L, 316, 316L, 321 |
| Outside Diameter | 6 mm to 101.6 mm |
| Wall Thickness | 0.5 mm to 3 mm |
| Type | Welded, welded & drawn |
| Length | Up to 6 m, coils for small OD |
| Finish | Bright annealed, pickled, polished |
Grades & standards
- Stainless Steel 304
- Stainless Steel 304L
- Stainless Steel 316
- Stainless Steel 316L
- Stainless Steel 321
- ASTM A269
- ASTM A249
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.
| C | Mn | P | S | Si | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|
| 0.08 | 2.00 | 0.045 | 0.030 | 0.75 | 16.0–18.0 | 10.0–14.0 | 2.00–3.00 | 0.10 |
| Tensile strength, min | 515 MPa |
|---|---|
| Yield strength (0.2%), min | 205 MPa |
| Elongation in 50 mm, min | 40% |
| Hardness, max | 217 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 | Mo | N |
|---|---|---|---|---|---|---|---|---|
| 0.030 | 2.00 | 0.045 | 0.030 | 0.75 | 16.0–18.0 | 10.0–14.0 | 2.00–3.00 | 0.10 |
| Tensile strength, min | 485 MPa |
|---|---|
| Yield strength (0.2%), min | 170 MPa |
| Elongation in 50 mm, min | 40% |
| Hardness, max | 217 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 | Ti | N |
|---|---|---|---|---|---|---|---|---|
| 0.08 | 2.00 | 0.045 | 0.030 | 0.75 | 17.0–19.0 | 9.0–12.0 | 5×(C+N) – 0.70 | 0.10 |
| Tensile strength, min | 515 MPa |
|---|---|
| Yield strength (0.2%), min | 205 MPa |
| Elongation in 50 mm, min | 40% |
| Hardness, max | 217 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 Stainless Steel Welded Tubes from verified manufacturers, mills and stockists on MetalMitra. Precision welded stainless tubes in thin and medium walls for instrumentation, heat transfer and general process lines.
Share your size, grade, quantity and delivery location once, and compare offers from suppliers who stock or manufacture Stainless Steel Welded Tubes to ASTM A249.
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 Stainless Steel Welded Tubes follow ASTM A249, A269 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 Stainless Steel Welded Tubes 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.
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