SS 304 Round TubeASTM A213 · Tube specification · Manufacturer, trader & exporter, India
AISI 304 · UNS S30400
An SS 304 round tube is tube ordered by exact OD and wall thickness, made from SS 304 to ASTM A213 · A269 · A249. Round tube is used for heat exchangers, boilers and instruments, with tighter tolerances than pipe.
- ASTM A213
- Tube specification
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is an SS 304 Round Tube?
- What it is
- Tube ordered by exact OD and wall thickness
- Material
- ASTM A213 · A269 · A249
- Dimensions
- Tube specification
- Grade
- SS 304 · UNS S30400
- Best at
- General corrosion resistance, food, water and architectural work
SS 304 Round Tube Specification
| Product | SS 304 Round Tube |
|---|---|
| Material standard | ASTM A213 · A269 · A249 |
| Dimensional standard | Tube specification |
| Sizes | OD × wall to order |
| Length | Random, double random or cut lengths |
| Testing | PMI (as specified in the PO) · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 or 3.2 on request / as specified in the PO |
When to Choose a Round Tube
Round tube is used for heat exchangers, boilers and instruments, with tighter tolerances than pipe.
- OD × wall ordering
- Seamless or welded
- Straight or U-bent
More on choosing: Round tube guide.
SS 304 Round Tube: Why 304 for round tubes
Round tube is used for heat exchangers, boilers and instruments, with tighter tolerances than pipe. In SS 304, the choice usually comes down to the medium and temperature — the rows here are the points buyers check for this exact combination.
| Why this grade | Stainless tubulars are the default for corrosive and hygienic service. SS 304 is picked for general corrosion resistance, food, water and architectural work. |
|---|---|
| Typical service | Food & dairy — Tanks, piping and equipment that must be cleaned daily. |
| Welding to carbon steel | ER309L (or E309L electrode) is the usual filler when joining it to carbon steel |
| Matching filler | ER308 / ER308L (AWS A5.9) |
SS 304 Round Tube Chemical Composition
Under technical review for TDS.
| Element | Current requirement |
|---|---|
| Chromium | As specified |
| Nickel | As specified |
| Carbon | As specified |
| Manganese | As specified |
| Silicon | As specified |
| Nitrogen | As specified |
| Phosphorus | As specified |
| Sulphur | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification to be verified: ASTM A240 for UNS S30400.
SS 304 Round Tube Mechanical Properties
Under technical review for TDS.
| Property | Current requirement |
|---|---|
| Tensile strength | As specified |
| Yield strength 0.2% | As specified |
| Elongation | As specified |
| Hardness | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification and condition to be verified: ASTM A240 for UNS S30400 — Annealed plate & sheet.
Full chemistry, properties and equivalents are on the SS 304 grade page.
Other SS 304 pipes & tubes
SS 304 Round Tube — questions buyers ask
What is the difference between tube and pipe?
Tube is specified by exact OD and wall; pipe by nominal size and schedule.
Can SS 304 round tubes be welded to carbon steel?
Yes — ER309L (or E309L electrode) is the usual filler when joining it to carbon steel.
Which standard covers SS 304 round tubes?
The material is ASTM A213 · A269 · A249; dimensions follow Tube specification. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a SS 304 round tube?
The alloy price, the size and dimensions, quantity, and the testing and documents required. Send your list and we quote the same working day.
What documents do you supply?
EN 10204 3.1 or 3.2 certificates available on request / as specified in the PO; dimensional reports as required. PMI can be arranged depending on product and requirements, as specified in the PO.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026