EN10219 S275J0H ERW Pipe
EN10219 S275J0H ERW Pipe: Cold-Formed Structural Hollow Section Steel Grade
Detailed analysis of EN10219 S275J0H ERW pipe, covering chemical composition, mechanical & physical properties, equivalents, and application guide for structural engineering.
Cold forming and electric resistance welding (ERW), suitable for further cutting, machining, and galvanizing
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EN10219 S275J0H ERW Pipe Introduction
EN10219 S275J0H is a cold-formed, electric resistance welded (ERW) structural hollow section made from non-alloy structural steel. It complies with European standard EN 10219-1:2006. The grade designation S275J0H indicates minimum yield strength of 275 MPa for thicknesses ≤16 mm, a Charpy impact energy guarantee of at least 27 J at 0°C (J0), and the 'H' denotes hollow section. This material is characterized by good weldability, adequate toughness at low temperatures, and reliable mechanical strength suitable for structural applications. It is primarily used in building frames, bridges, and general construction. The ERW pipe is delivered in as-welded or stress-relieved condition, depending on customer requirements and section size.
EN10219 S275J0H ERW Pipe Chemical Composition
The chemical composition is based on EN 10219-1 Table 1 for grade S275J0H. Values represent maximum limits unless a range is given. The steel is fully killed and shall contain sufficient amounts of nitrogen-binding elements (e.g., aluminium). Typical traces of silicon and copper may be present but are not specified. All figures are in weight percent.
| Chemical Element | Standard Value (max) | Remarks |
|---|---|---|
| Carbon (C) | 0.20% | Ladle analysis |
| Manganese (Mn) | 1.50% | Ladle analysis |
| Phosphorus (P) | 0.030% | Ladle analysis |
| Sulfur (S) | 0.025% | Ladle analysis |
| Aluminium (Al total) | ≥0.015% | Minimum for fully killed steel |
| Nitrogen (N) | 0.009% | Ladle analysis |
| Silicon (Si) | ≤0.55% | Not specified; typical for deoxidation |
| Copper (Cu) | ≤0.55% | Not specified; possible in scrap-based steel |
| Other (Cr, Ni, Mo, etc.) | Not specified | Residual elements limited by steelmaking practice |
EN10219 S275J0H ERW Pipe Thermal and Electrical Physical Properties
Physical properties are not mandated by EN 10219 but are characteristic for S275-grade structural carbon steel at room temperature. These values are averaged from standard references and can be used for design calculations. Actual properties may vary slightly with composition and manufacturing process.
| Property | Typical Value | Unit | Test Condition / Remarks |
|---|---|---|---|
| Density (ρ) | 7.85 | g/cm³ | At 20°C |
| Modulus of elasticity (E) | 210 | GPa | At 20°C |
| Shear modulus (G) | 81 | GPa | At 20°C |
| Poisson's ratio (ν) | 0.3 | – | Elastic range |
| Thermal expansion coefficient (α) | 12 × 10⁻⁶ | 1/K | Between 20°C and 100°C |
| Thermal conductivity (λ) | 50 | W/(m·K) | At 20°C, approximate |
| Specific heat capacity | 460 | J/(kg·K) | At 20°C |
| Electrical resistivity (ρ_e) | 0.13 × 10⁻⁶ | Ω·m | At 20°C |
EN10219 S275J0H ERW Pipe Mechanical Properties
Mechanical properties are guaranteed by the manufacturer according to EN 10219-1. The values refer to room temperature testing on longitudinal specimens. Tensile test requirements depend on wall thickness (t). Impact test is performed on Charpy-V notch specimens at 0°C (J0 quality). Bending test should not show cracks. Replace t with actual wall thickness for bending diameter.
| Property | Standard Requirement | Unit | Test Condition / Remarks |
|---|---|---|---|
| Yield strength (ReH), t ≤ 16 mm | ≥ 275 | MPa | Longitudinal, ambient |
| Yield strength (ReH), 16 < t ≤ 40 mm | ≥ 265 | MPa | Longitudinal, ambient |
| Yield strength (ReH), 40 < t ≤ 63 mm | ≥ 255 | MPa | Longitudinal, ambient |
| Yield strength (ReH), 63 < t ≤ 80 mm | ≥ 245 | MPa | Longitudinal, ambient |
| Yield strength (ReH), 80 < t ≤ 100 mm | ≥ 235 | MPa | Longitudinal, ambient |
| Yield strength (ReH), 100 < t ≤ 120 mm | ≥ 225 | MPa | Longitudinal, ambient |
| Tensile strength (Rm) | 370 – 530 | MPa | Longitudinal, ambient |
| Elongation (A), t ≤ 40 mm | ≥ 24 | % | L₀=5.65√S₀, longitudinal |
| Elongation (A), t > 40 mm | ≥ 23 | % | L₀=5.65√S₀, longitudinal |
| Impact energy (KV₂), at 0°C | ≥ 27 | J | Charpy-V, longitudinal, average of 3 tests |
| Bend test (mandrel diameter), t ≤ 16 mm | 2t | mm | 180° bending; no cracks |
| Bend test (mandrel diameter), t > 16 mm | 3t | mm | 180° bending; no cracks |
EN10219 S275J0H ERW Pipe Fully Equivalent Material Grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| European Union | EN 10210-1:2006 | S275J0H | Hot-finished structural hollow sections; same chemistry & tensile properties |
| European Union | EN 10025-2:2019 | S275J0 | Hot-rolled structural steel for flat and long products; covers non-hollow sections |
| International (ISO) | ISO 630-2:2011 | Fe430C | Structural steel with similar strength and 0°C impact quality; used for non-hollow applications |
EN10219 S275J0H ERW Pipe Application Introduction
S275J0H ERW pipes and hollow sections are engineered for a balance of strength, toughness, and weldability. They are suitable for static and dynamically loaded structures where low-temperature toughness is required. Manufacturing options include cold forming followed by ERW, leading to close dimensional tolerances. The material can be easily cut, drilled, welded, and hot-dip galvanized without compromising mechanical integrity. Typical design codes (Eurocode 3) fully cover the use of this grade.
Product Applications: Steel frame columns and beams, Roof trusses and space frames, Scaffolding and shoring systems, Transmission line towers and monopoles, Highway guardrails and sign supports, Container frames and chassis, Greenhouse structures
Processed into products: Hollow section chord and brace members in trusses, Arc-welded beam-to-column connections using end plates, Base plates for hollow columns, Pipe-in-pipe splice joints, Gusset plate connections for bracing, Bolted flange connections (with stiffeners), Adjustable leg levelers and telescopic parts, Welded stub-in branches for piping and duct systems
Application industries: Civil engineering and construction, Bridge and highway infrastructure, Energy transmission (towers, poles), Automotive and trailer manufacturing, Agricultural and forestry machinery, Offshore topside structures (limited to non-corrosive environments), Pre-engineered metal buildings
EN10219 S275J0H ERW Pipe Similar / Alternative Materials with Comparable Performance
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| USA | ASTM A500 / A500M | Grade B | Cold-formed welded & seamless hollow sections; minimum yield 315 MPa, tensile 400 MPa; often used interchangeably but higher strength |
| Japan | JIS G 3466 | STKR400 | Carbon steel square & rectangular tubes; min. yield 235 MPa, tensile 400–510 MPa; similar structural tube but lower strength |
| China | GB/T 6728 | Q275B | Cold-formed steel hollow sections; yield ≥275 MPa, tensile 370–500 MPa, 20°C impact; closest Chinese equivalent |
| India | IS 4923 | YST 310 | Hollow sections for structural use; yield ≥310 MPa, tensile ≥450 MPa; higher strength, may need weld procedure adjustment |
Notes:
- For welded hollow sections, the weld seam must be full penetration and the weld zone may exhibit slightly different mechanical properties; design should account for any HAZ softening if post-weld heat treatment is applied.
- When ordering, specify nominal dimensions according to EN 10219-2, along with grade, quality (J0), and end finish.
- For applications requiring improved atmospheric corrosion resistance, weathering steel variants (e.g., S355J2W) may be considered; S275J0H is not inherently corrosion resistant, so surface protection (painting, galvanizing) is recommended for outdoor use.
- Thicknesses above 120 mm are outside the standard scope; consult manufacturer for special requirements.
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