S355J0H Steel to EN 10219
EN10219 S355J0H SSAW Pipe: Comprehensive Material Data & Structural Hollow Section Properties
Complete technical dataset for S355J0H grade according to EN10219, widely used in welded structural hollow sections and spiral submerged arc welded (SSAW) pipes. Includes chemical composition, mechanical properties, thermal and electrical parameters, international equivalents, and application guidelines.
Cold forming, longitudinal or spiral submerged arc welding (SAW), normalizing (+N) or as‑rolled (+AR), stress relief heat treatment if required, cutting, machining and galvanizing
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S355J0H Steel to EN 10219 Introduction
S355J0H is a weldable fine‑grain structural steel grade defined in EN 10219‑1 for cold‑formed welded structural hollow sections. It belongs to the S355 family and offers a minimum yield strength of 355 MPa with enhanced low‑temperature toughness, designated by the J0 suffix (minimum 27 J at 0 °C).
The grade is delivered in the normalized (+N) or as‑rolled (+AR) condition and is extensively used for circular, square and rectangular hollow profiles, including spiral submerged arc welded (SSAW) pipes.
Its balanced chemistry ensures excellent weldability, good formability and reliable performance in static and dynamically loaded structures. Typical applications cover building frameworks, bridges, offshore modules, machinery components and infrastructure projects where high strength and good ductility are required.
S355J0H Steel to EN 10219 Chemical Composition
The following table lists the maximum and minimum limits for the ladle analysis of S355J0H according to EN 10219‑1:2006, Table 1 – Chemical composition for non‑alloy structural steels for cold‑formed hollow sections. Applicable for product thickness ≤ 40 mm. For thicknesses > 40 mm slightly different carbon equivalent (CEV) limits may apply. Aluminium is added as grain refiner; the sum of Nb, V and Ti is restricted to ensure fine‑grain practice and good weldability.
| Element | Content (%) | Remarks |
|---|---|---|
| C (Carbon) | ≤ 0,22 | Max |
| Si (Silicon) | ≤ 0,55 | Max |
| Mn (Manganese) | ≤ 1,60 | Max |
| P (Phosphorus) | ≤ 0,035 | Max |
| S (Sulfur) | ≤ 0,035 | Max |
| N (Nitrogen) | ≤ 0,012 | Max |
| Al (Aluminium, total) | ≥ 0,020 | Min (acid‑soluble Al is also acceptable) |
| Nb (Niobium) | ≤ 0,05 | Optional – sum Nb+V+Ti ≤ 0,22 % |
| V (Vanadium) | ≤ 0,13 | Optional – sum Nb+V+Ti ≤ 0,22 % |
| Ti (Titanium) | ≤ 0,05 | Optional – sum Nb+V+Ti ≤ 0,22 % |
| Ni (Nickel) | ≤ 0,50 | Max |
| Cr (Chromium) | ≤ 0,30 | Max |
| Mo (Molybdenum) | ≤ 0,10 | Max |
| Cu (Copper) | ≤ 0,55 | Max |
| CEV (Carbon Equivalent) | ≤ 0,45 | CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15 – for t ≤ 40 mm |
S355J0H Steel to EN 10219 Thermal and Electrical Physical Properties
The following values represent typical physical properties for fine‑grain structural steels similar to S355J0H. They are not mandatory requirements of EN 10219 but are widely used for design and simulation. Small variations may occur depending on the exact chemical composition and heat treatment condition.
| Property | Typical Value | Unit | Test Condition / Remarks |
|---|---|---|---|
| Density (ρ) | 7850 | kg/m³ | At room temperature |
| Modulus of elasticity (E) | 210 | GPa | At room temperature |
| Shear modulus (G) | ≈ 80 | GPa | Calculated |
| Poisson's ratio (ν) | 0,3 | – | Elastic range |
| Thermal expansion coefficient (α) | 12 × 10⁻⁶ | K⁻¹ | Between 20 °C and 100 °C; 13 × 10⁻⁶ up to 300 °C |
| Thermal conductivity (λ) | 50 | W/(m·K) | At 20 °C; decreases to ≈ 40 W/(m·K) at 400 °C |
| Specific heat capacity (c) | 460 | J/(kg·K) | At 20 °C; increases with temperature |
| Electrical resistivity (ρe) | 0,20 – 0,25 | Ω·mm²/m | At 20 °C; higher for alloyed variants |
S355J0H Steel to EN 10219 Mechanical Properties
The mechanical properties are determined on test specimens taken from the finished hollow section in the longitudinal direction. Yield strength depends on wall thickness; minimum values for the most common thickness ranges are listed. The tensile strength range applies to all thicknesses. Minimum elongation A5 (L0=5,65√S0) is given for longitudinal specimens. The Charpy V‑notch impact energy is guaranteed at 0 °C (J0 quality). Bend test requirements are specified for finished hollow sections when ordered as such.
| Property | Required Value | Unit | Test Condition / Remarks |
|---|---|---|---|
| Yield strength (ReH) | ≥ 355 | MPa | Wall thickness t ≤ 16 mm |
| Yield strength (ReH) | ≥ 345 | MPa | Wall thickness 16 < t ≤ 40 mm |
| Yield strength (ReH) | ≥ 335 | MPa | Wall thickness 40 < t ≤ 63 mm |
| Yield strength (ReH) | ≥ 325 | MPa | Wall thickness 63 < t ≤ 80 mm |
| Yield strength (ReH) | ≥ 315 | MPa | Wall thickness 80 < t ≤ 100 mm |
| Tensile strength (Rm) | 470 – 630 | MPa | All thicknesses; for t < 3 mm the lower limit is 485 MPa |
| Elongation (A) | ≥ 20 | % | L0=5,65√S0, longitudinal, t ≤ 40 mm |
| Elongation (A) | ≥ 19 | % | L0=5,65√S0, longitudinal, t > 40 mm |
| Charpy V‑notch impact energy (KV) | ≥ 27 | J | 0 °C, longitudinal specimen, full‑size (10×10 mm) |
| Bend test (180°) | No cracks or defects | – | Mandrel diameter: d = 2a (t ≤ 16 mm); d = 3a (16 < t ≤ 40 mm); wider mandrels for thicker walls per product standard agreement |
S355J0H Steel to EN 10219 Fully Equivalent Material Standards and Recommendable Substitute Grades
| Country / Region | Standard | Grade | Remarks |
|---|---|---|---|
| Europe | EN 10219-1:2006 | S355J0H | Origin standard; cold‑formed welded structural hollow sections |
| Europe | EN 10210-1:2006 | S355J0H | Hot‑finished structural hollow sections (same grade designation for hot‑finished products) |
| United Kingdom | BS EN 10219-1:2006 | S355J0H | Identical adoption of EN 10219‑1 |
| Germany | DIN EN 10219-1:2006 | S355J0H | German version of EN 10219‑1 |
S355J0H Steel to EN 10219 Application Introduction
S355J0H hollow sections and SSAW pipes are selected because of their excellent strength‑to‑weight ratio, reliable weldability and good low‑temperature toughness. They are used in a wide range of structural and mechanical engineering applications. Below are typical industries, products and specific components:
Product Applications: Structural frameworks for high‑rise buildings and industrial halls, Bridge superstructures and temporary bridges, Piling pipes and foundation casings, Offshore platform legs and braces, Wind turbine towers (internal ring stiffeners, platform supports), Telecommunication towers and masts, Railway carriage underframes, High‑pressure fluid transmission pipes (when specified with appropriate testing), Architectural exposed structural elements
Processed into products: Columns, beams and truss chords, Lattice boom sections for cranes, Bracing members and tie rods, Trailer frames and drawbars, Agricultural cultivator frames and tillage tool booms, Conveyor rollers and idler frames, Spacer rings and flanges for pipe systems, Piled foundation tubes, Scaffolding and falsework
Application industries: Civil engineering and building construction, Bridge building and highway infrastructure, Offshore and marine structures, Wind energy (tower internals, transition pieces), Mining and quarrying equipment, Agricultural machinery, Automotive and transport (chassis, trailer frames), Conveyor and materials handling systems, Process plant and piping
S355J0H Steel to EN 10219 Similar / Comparable Material Alternatives
| Country / Region | Standard | Grade | Remarks |
|---|---|---|---|
| USA | ASTM A500 / A500M | Grade C | Cold‑formed welded structural tubing; yield min. 345 MPa, tensile min. 427 MPa; impact toughness not specified; CEV typically higher |
| USA | ASTM A501 | Grade 345 | Hot‑formed structural tubing; similar strength but different production route |
| Japan | JIS G 3466 | STKR490 | Welded structural square/rectangular steel tube; yield min. 325 MPa (t≤12 mm), tensile min. 490 MPa; cement depending on thickness |
| Europe | EN 10219-1 | S355J2H | Same yield strength and chemistry but with impact energy guaranteed at -20 °C (J2); better low‑temperature performance |
| Europe | EN 10219-1 | S275J0H | Lower strength grade (275 MPa yield), otherwise similar weldability and toughness; suitable for less demanding applications |
Notes:
- Welding: S355J0H has excellent weldability using all common arc processes (SMAW, GMAW, SAW). Low‑hydrogen procedures are recommended for thicknesses above 30 mm. Pre‑heating is generally not required for t ≤ 30 mm when using basic consumables.
- SSAW specific: Spiral submerged arc welded pipes made from S355J0H steel are often subject to supplementary non‑destructive testing (ultrasonic or radiographic) for critical structural applications. The weld seam must meet the same properties as the base material.
- Corrosion protection: The material can be hot‑dip galvanized or painted after appropriate surface preparation. The silicon content (<0,55 %) is compatible with modern galvanizing processes.
- Availability: Hollow sections are widely available from European mills and many international producers certified to EN 10219. SSAW pipes are produced up to large diameters (typically 219 mm to over 3000 mm) with wall thicknesses from 5 mm up to about 25 mm or more.
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