EN10219 S275J2H SHS/RSH Pipe
EN10219 S275J2H SHS/RSH Pipe: Cold-Formed Structural Hollow Section with Superior Impact Toughness
Comprehensive technical data for S275J2H steel hollow sections according to EN 10219, including chemical composition, mechanical properties, thermal and electrical physical properties, international equivalents, and application guidelines.
Cold forming, welding (high-frequency induction or submerged arc), cutting to length, drilling, bending (restricted by minimum bend radii), stress-relief heat treatment if specified
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EN10219 S275J2H SHS/RSH Pipe Introduction
S275J2H is a non-alloy structural steel grade for cold-formed welded hollow sections, specified in the European standard EN 10219-1. The designation 'S' stands for structural steel, '275' indicates a minimum yield strength of 275 MPa for thicknesses up to 16 mm, 'J2' signifies a minimum impact energy of 27 J at -20°C (longitudinal Charpy V-notch), and 'H' denotes hollow profile.
Key characteristics:
- Excellent formability and weldability due to controlled chemical composition and fine-grain practice.
- Guaranteed low-temperature toughness, making it suitable for dynamically loaded structures and cold-climate applications.
- Available as square hollow sections (SHS) and rectangular hollow sections (RHS) with various wall thicknesses.
- Often supplied in the as-welded, cold-formed condition with subsequent stress-relief heat treatment if required.
EN10219 S275J2H SHS/RSH Pipe Chemical Composition
Limits according to EN 10219-1:2006 for grade S275J2H. Elements Al, Nb, V, Ti are added to ensure fine-grain structure and adequate low-temperature toughness. Carbon equivalent (CEV) is controlled to guarantee weldability – typically CEV ≤ 0.40%. All values are maximum unless a range is given.
| Chemical Element | Standard Value (max %) | Remarks |
|---|---|---|
| Carbon (C) | 0.20 | Higher C may impair weldability |
| Silicon (Si) | Not specified (typically ≤ 0.55) | Deoxidising element; may be limited by customer |
| Manganese (Mn) | 1.50 | Contributes to strength and toughness |
| Phosphorus (P) | 0.025 | Low P ensures ductility |
| Sulfur (S) | 0.025 | Low S for good through-thickness properties |
| Aluminium (Al total) | ≥ 0.020 | Fine-grain element; mandatory for J2 quality |
| Niobium (Nb) | 0.05 | Optional grain refiner; sum of Nb + V + Ti may be restricted |
| Vanadium (V) | 0.02 | Optional; see Nb remark |
| Titanium (Ti) | 0.03 | Optional; see Nb remark |
| Nitrogen (N) | 0.012 | If not fixed by Al, Nb, V, or Ti |
| Copper (Cu) | 0.55 | Residual element; can be higher if agreed |
| Chromium (Cr) | 0.30 | Residual; not added intentionally |
| Nickel (Ni) | 0.30 | Residual |
| Molybdenum (Mo) | 0.10 | Residual |
EN10219 S275J2H SHS/RSH Pipe Thermal and Electrical Physical Properties
These properties are not specified in EN 10219 but are representative of non-alloy structural steels at room temperature (20°C) unless a temperature range is given. Density, elastic modulus, and thermal expansion are essential for design calculations. Resistivity and thermal conductivity can vary with alloy content and temperature.
| Property | Typical Value | Unit | Test Condition / Temperature |
|---|---|---|---|
| Density (ρ) | 7800 | kg/m³ | 20°C |
| Modulus of elasticity (E) | 210 | GPa | 20°C, static |
| Shear modulus (G) | ~81 | GPa | 20°C, calculated from E and ν |
| Poisson's ratio (ν) | 0.3 | — | 20°C, elastic range |
| Thermal expansion coefficient (α) | 10.5 × 10⁻⁶ | K⁻¹ | 20–100°C |
| Thermal expansion coefficient (α) | 11.5 × 10⁻⁶ | K⁻¹ | 20–200°C |
| Thermal expansion coefficient (α) | 12.5 × 10⁻⁶ | K⁻¹ | 20–300°C |
| Thermal conductivity (λ) | 50 | W/(m·K) | 20°C |
| Thermal conductivity (λ) | 45 | W/(m·K) | 300°C |
| Specific heat capacity (cₚ) | 460 | J/(kg·K) | 20°C |
| Specific heat capacity (cₚ) | 500 | J/(kg·K) | 300°C |
| Electrical resistivity (ρₑ) | 0.20 | μΩ·m | 20°C |
EN10219 S275J2H SHS/RSH Pipe Mechanical Properties
Tested on longitudinal specimens taken from the finished hollow section. Yield strength (ReH) and tensile strength (Rm) vary with wall thickness. The Charpy impact test (KV2) is performed at -20°C on full-size specimens; the minimum average value is 27 J. Bending test is carried out with a mandrel diameter that depends on the wall thickness.
| Property | Required Value | Unit | Test Condition |
|---|---|---|---|
| Yield strength (ReH) | ≥ 275 | MPa | Wall thickness t ≤ 16 mm |
| Yield strength (ReH) | ≥ 265 | MPa | 16 < t ≤ 40 mm |
| Yield strength (ReH) | ≥ 255 | MPa | 40 < t ≤ 63 mm |
| Yield strength (ReH) | ≥ 245 | MPa | 63 < t ≤ 80 mm |
| Yield strength (ReH) | ≥ 235 | MPa | 80 < t ≤ 100 mm |
| Tensile strength (Rm) | 410 – 560 | MPa | All thicknesses |
| Tensile strength (Rm) | 430 – 580 | MPa | t ≤ 3 mm (alternative range) |
| Elongation after fracture (A) | ≥ 22 (longitudinal) | % | L₀ = 5.65√S₀, t ≤ 40 mm |
| Elongation after fracture (A) | ≥ 20 (transverse) | % | t ≤ 40 mm |
| Elongation after fracture (A) | ≥ 21 (longitudinal) | % | 40 < t ≤ 63 mm |
| Elongation after fracture (A) | ≥ 19 (transverse) | % | 40 < t ≤ 63 mm |
| Elongation after fracture (A) | ≥ 20 (longitudinal) | % | 63 < t ≤ 100 mm |
| Elongation after fracture (A) | ≥ 18 (transverse) | % | 63 < t ≤ 100 mm |
| Charpy V-notch impact (KV₂) at -20°C | ≥ 27 | J | Longitudinal, average of 3 tests; one single value ≥ 20 J |
| Bending test (mandrel diameter) | 2 t | — | 180° bend, t ≤ 16 mm |
| Bending test (mandrel diameter) | 3 t | — | 180° bend, t > 16 mm |
EN10219 S275J2H SHS/RSH Pipe Fully Equivalent Material Standards and Grade Designations
| Country / Region | Standard | Grade | Remarks |
|---|---|---|---|
| European Union | EN 10219-1 | S275J2H | Identical; cold-formed welded hollow sections |
| International | ISO 10799-2 | S275J2H | Technically identical; cold-formed structural hollow sections |
| United Kingdom | BS EN 10219-1 | S275J2H | British adoption of EN standard; fully interchangeable |
| Germany | DIN EN 10219-1 | S275J2H | German version; same requirements |
| France | NF EN 10219-1 | S275J2H | French version; same requirements |
| Italy | UNI EN 10219-1 | S275J2H | Identical national standard |
| Spain | UNE EN 10219-1 | S275J2H | Identical national standard |
| Sweden | SS EN 10219-1 | S275J2H | Identical national standard |
EN10219 S275J2H SHS/RSH Pipe Application Introduction
S275J2H hollow sections provide an excellent balance of strength, ductility, and low-temperature toughness, making them ideal for a wide range of structural and mechanical applications. Their cold-formed geometry with smooth finish and uniformity allows for efficient fabrication, welding, and assembly.
Typical industries and products:
Product Applications: Structural hollow section profiles (SHS, RHS) cut to length, Welded frames and sub-assemblies, Prefabricated modular steel structures, Road restraint systems (e.g., guardrail posts), Signage and lighting columns
Processed into products: Columns and struts for buildings, Truss members in roofs and bridges, Boom sections for agricultural sprayers, Trailer chassis members, Forklift masts and carriage components, Mechanical linkages and supports, Furniture frames (when aesthetic welded details are required)
Application industries: Building and construction (multi-storey frames, columns, beams, trusses), Civil engineering (bridges, walkways, guardrails, poles), Industrial equipment (machine frames, conveyor structures, platforms), Transportation (trailers, railway components, bus frames), Energy (transmission line towers, wind turbine support structures), Agricultural machinery (greenhouses, barn frames, silos)
EN10219 S275J2H SHS/RSH Pipe Similar or Alternative Material Recommendations
| Country / Region | Standard | Grade | Remarks |
|---|---|---|---|
| European Union | EN 10219-1 | S275J0H | Lower toughness: 0°C impact instead of -20°C; otherwise similar strength and composition |
| European Union | EN 10219-1 | S355J2H | Higher strength grade (min 355 MPa yield); same -20°C impact requirement; good alternative for weight reduction |
| European Union | EN 10210-1 | S275J2H | Hot-finished hollow sections; same chemical and mechanical requirements but different delivery condition |
| USA | ASTM A500 | Grade B | Yield 315 MPa, tensile 400 MPa; impact not specified; often used in similar structural applications |
| USA | ASTM A500 | Grade C | Yield 345 MPa; higher strength, no impact requirement |
| Japan | JIS G 3466 | STKR400 | Yield ≥ 245 MPa, tensile 400–510 MPa; no explicit low-temperature impact requirement; consider STKR490 for higher strength |
| China | GB/T 3091 | Q235B | Lower yield (235 MPa); no guaranteed low-temperature toughness; upgrade to Q345D (-20°C impact) for closer match |
| International | ISO 10799-2 | S275J0H | 0°C impact version of the same cold-formed standard |
Notes:
All data provided is based on the official European standard EN 10219-1:2006 and typical reference values for structural steel. For critical applications, the designer should verify specific properties with the material test certificate. Welding: S275J2H is readily weldable using common methods (MAG, MMA, TIG) with low-hydrogen consumables; preheating is generally not required for sections with moderate thickness (≤30 mm). Corrosion protection: As an uncoated steel, it requires galvanising, painting, or other protective systems when exposed to corrosive environments. Tolerances: Dimensions and shape tolerances are defined in EN 10219-2.
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