S355J2+N Round TubeEN 10219 · Tube specification · Manufacturer, stockist & exporter, India
EN 10025-2 S355J2+N · W.Nr 1.0577
An S355J2+N round tube is tube ordered by exact OD and wall thickness, for use with S355J2+N service. S355J2+N itself is a pipe or plate specification, so the matching round tube is made to EN 10219 square & rectangular sections — which is what we supply for S355J2+N lines. Round tube is used for heat exchangers, boilers and instruments, with tighter tolerances than pipe.
- EN 10219
- 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 S355J2+N Round Tube?
- What it is
- Tube ordered by exact OD and wall thickness
- Material
- EN 10219 square & rectangular sections
- Dimensions
- Tube specification
- Grade
- S355J2+N
- Best at
- Heavy structures, cranes and offshore frames
S355J2+N Round Tube Specification
| Product | S355J2+N Round Tube |
|---|---|
| Material standard | EN 10219 square & rectangular sections |
| Dimensional standard | Tube specification |
| Sizes | OD × wall to order |
| Length | Random, double random or cut lengths |
| Testing | Chemical & mechanical per heat · NDT · impact where specified |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection |
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.
S355J2+N Round Tube: Why S355J2+N for round tubes
Round tube is used for heat exchangers, boilers and instruments, with tighter tolerances than pipe. In S355J2+N, 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 | Carbon steel tubulars carry most hydrocarbon and utility service. S355J2+N is picked for heavy structures, cranes and offshore frames. |
|---|---|
| Typical service | Heavy structures — Bridges, cranes and towers. |
| Welding to carbon steel | Matching carbon or low-alloy filler is used; joints to stainless need ER309L |
| Matching filler | E7018 / ER70S-6 |
S355J2+N Round Tube Chemical Composition
| Element | Weight % |
|---|---|
| Carbon | 0.20 max (≤16 mm) |
| Manganese | 1.60 max |
| Silicon | 0.55 max |
| Phosphorus | 0.025 max |
| Sulphur | 0.025 max |
| Copper | 0.55 max |
S355J2+N Round Tube Mechanical Properties
| Normalised (+N) | Value |
|---|---|
| Yield strength | 355 MPa (≤16 mm) |
| Tensile strength | 470 – 630 MPa |
| Elongation | 22% |
| Charpy impact | 27 J at −20 °C |
Full chemistry, properties and equivalents are on the S355J2+N grade page.
Standards on this page
Other S355J2+N pipes & tubes
S355J2+N Round Tubes for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiS355J2+N 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 S355J2+N round tubes be welded to carbon steel?
Yes — matching carbon or low-alloy filler is used; joints to stainless need ER309L.
Which standard covers S355J2+N round tubes?
The material is EN 10219 square & rectangular sections; 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 S355J2+N round tube?
The steel 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 mill certificates as standard, 3.2 with third-party inspection on request, plus dimensional and PMI reports.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026