EN10219 S275MH SHS/RSH Pipe
EN10219 S275MH SHS/RSH Pipe: Full Material Specification & Data
Complete material properties for EN10219 S275MH structural hollow sections: chemical composition, mechanical strength, physical data, and equivalent grades.
Cold forming, welding, hot-dip galvanizing, machining, bending, cutting
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EN10219 S275MH SHS/RSH Pipe Introduction
S275MH is a thermomechanically rolled fine-grain structural steel grade for cold-formed welded structural hollow sections according to EN 10219. It offers a minimum yield strength of 275 MPa and good weldability and toughness, suitable for structural applications. The 'M' denotes thermomechanical rolling, while 'H' denotes hollow sections. Typical shapes include square (SHS), rectangular (RHS) and circular (CHS) hollow sections. The steel is designed for cold forming and welding, with excellent formability and consistent mechanical properties across the section. It is widely used in construction, infrastructure and mechanical engineering.
EN10219 S275MH SHS/RSH Pipe Chemical Composition
The chemical composition of S275MH is controlled to ensure good weldability and toughness. Maximum limits are specified for elements such as carbon, phosphorus and sulfur, while aluminum is added as a grain refiner. Niobium, vanadium and titanium may be present in microalloying amounts to enhance strength.
- All values are in weight percent (wt%) based on ladle analysis.
- Elements not listed may be present as residuals.
| Chemical Element | Standard Value (wt%) | Remarks |
|---|---|---|
| Carbon (C) | ≤ 0.13 | Ladle analysis |
| Silicon (Si) | ≤ 0.50 | Ladle analysis |
| Manganese (Mn) | ≤ 1.50 | Ladle analysis |
| Phosphorus (P) | ≤ 0.035 | Ladle analysis |
| Sulfur (S) | ≤ 0.030 | Ladle analysis |
| Aluminum (Al) | ≥ 0.015 | Total Al, ladle analysis |
| Nitrogen (N) | ≤ 0.020 | Ladle analysis |
| Niobium (Nb) | ≤ 0.05 | Optional microalloy |
| Vanadium (V) | ≤ 0.10 | Optional microalloy |
| Titanium (Ti) | ≤ 0.05 | Optional microalloy |
| Chromium (Cr) | ≤ 0.30 | Residual element |
| Nickel (Ni) | ≤ 0.50 | Residual element |
| Molybdenum (Mo) | ≤ 0.20 | Residual element |
| Copper (Cu) | ≤ 0.35 | Residual element |
EN10219 S275MH SHS/RSH Pipe Thermal and Electrical Physical Properties
Physical properties are typical for carbon‑manganese structural steels at room temperature unless otherwise stated. Values are provided for design calculations and may vary slightly with exact composition and heat treatment.
- Density, elastic modulus and thermal expansion are consistent with common hollow section steels.
- Electrical resistivity is at 20°C.
- Thermal conductivity and specific heat capacity are given for room temperature.
| Property | Standard Value | Unit | Test Condition |
|---|---|---|---|
| Density (ρ) | 7850 | kg/m³ | Room temperature |
| Elastic Modulus (E) | 210 | GPa | Room temperature |
| Shear Modulus (G) | 81 | GPa | Room temperature |
| Poisson's Ratio (ν) | 0.3 | – | Room temperature |
| Thermal Expansion Coefficient (α) | 11.7 × 10⁻⁶ | /K | 20°C to 100°C |
| Thermal Conductivity (λ) | 50 | W/(m·K) | At 20°C |
| Specific Heat Capacity (c) | 460 | J/(kg·K) | At 20°C |
| Electrical Resistivity (ρ_e) | 0.18 | μΩ·m | At 20°C |
EN10219 S275MH SHS/RSH Pipe Mechanical Properties
The mechanical properties refer to the finished hollow section in the as-delivered condition. Values are applicable for square, rectangular and circular hollow sections.
- Yield strength (ReH) depends on wall thickness.
- Tensile test specimens are taken longitudinally (parallel to the tube axis).
- Charpy V‑notch impact tests are performed at -20°C on specimens with thickness ≥ 6 mm.
- Elongation is measured on a gauge length L0 = 5.65√S0.
| Property | Standard Value | Unit | Test Condition |
|---|---|---|---|
| Yield Strength (ReH) | ≥ 275 | MPa | Wall thickness ≤ 16 mm |
| Yield Strength (ReH) | ≥ 265 | MPa | Wall thickness 16 < t ≤ 40 mm |
| Yield Strength (ReH) | ≥ 255 | MPa | Wall thickness 40 < t ≤ 65 mm |
| Tensile Strength (Rm) | 370 – 530 | MPa | Wall thickness ≤ 65 mm |
| Elongation (A) | ≥ 24 | % | Wall thickness ≤ 40 mm, L0 = 5.65√S0, longitudinal |
| Elongation (A) | ≥ 23 | % | Wall thickness 40 < t ≤ 65 mm, L0 = 5.65√S0, longitudinal |
| Charpy Impact Energy (KV2) | ≥ 27 | J | At -20°C, wall thickness ≥ 6 mm, longitudinal |
EN10219 S275MH SHS/RSH Pipe Fully Equivalent Material Standards and Substitute Grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Europe | EN 10219 | S275MH | Identical grade; cold‑formed welded hollow sections |
EN10219 S275MH SHS/RSH Pipe Application Introduction
S275MH hollow sections are designed for load‑bearing structural applications where a combination of strength, ductility and weldability is essential. They are used in both static and dynamically loaded structures.
- Excellent for welded fabrications due to low carbon content and guaranteed impact toughness.
- Can be hot‑dip galvanized for corrosion protection in outdoor or aggressive environments.
- Suitable for cold forming and bending to create curved structural members.
Product Applications: Steel frameworks for industrial buildings, Bridges and pedestrian footbridges, Transmission towers and telecommunication masts, Scaffolding and temporary structures, Road safety barriers and sign supports, Structural supports for solar panels and wind turbines
Processed into products: Columns / Pillars, Beams and girders, Trusses and space frames, Bracing members, Frame corners and connectors, Cantilever arms and brackets, Machinery bases
Application industries: Building & Construction, Infrastructure & Civil Engineering, Mechanical & Heavy Engineering, Offshore & Marine, Agricultural & Greenhouses, Transportation & Automotive (structural parts)
EN10219 S275MH SHS/RSH Pipe Similar / Alternate Material Recommendations
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Europe | EN 10219 | S275J0H | Cold‑formed hollow section, same yield strength, impact tested at 0°C instead of -20°C |
| Europe | EN 10210 | S275J0H | Hot‑finished hollow section, similar mechanical properties, different delivery condition |
| USA | ASTM A500 | Grade B | Yield strength 290 MPa, tensile 400 MPa; similar structural hollow sections, composition differs slightly |
| Japan | JIS G3466 | STKR400 | Yield strength 245 MPa, tensile 400‑510 MPa; square/rectangular tubes for structures |
| China | GB/T 6728 | Q235B | Yield strength 235 MPa, lower strength; widely used in structural hollow sections |
Notes:
Welding: S275MH offers excellent weldability with all conventional methods. Preheating is generally not required for thicknesses up to 40 mm due to the low carbon equivalent (typically ≤0.35). Corrosion protection: The steel is suitable for hot‑dip galvanizing or painting. Forming: Cold bending radii should be at least 1.5 times the wall thickness to avoid cracking. Certification: The steel is supplied with inspection certificate 3.1 according to EN 10204, confirming compliance with EN 10219.
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