EN10219 S460MH ERW Pipe
EN10219 S460MH ERW Pipe - Hot-Rolled Fine Grain Structural Hollow Section for Heavy-Duty Applications
Explore detailed technical data on EN10219 S460MH ERW pipe: chemical composition, mechanical & thermal properties, equivalent grades, and application guidance. S460MH is a thermomechanically rolled fine grain weldable structural steel with minimum 460 MPa yield strength.
Cold forming, welding (ERW), cutting, drilling, machining, hot-dip galvanizing
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EN10219 S460MH ERW Pipe Introduction
EN10219 S460MH is a cold-formed welded structural hollow section made from thermomechanically rolled fine-grain steel, specified in European standard EN 10219-1:2006. It offers a minimum yield strength of 460 MPa and excellent weldability, toughness, and cold-forming capability. The 'MH' designation indicates a fine-grain structural steel with specified minimum impact energy at -20°C. Typical delivery condition is electric resistance welded (ERW) with square, rectangular or circular cross-sections.
- Yield strength up to 460 MPa (t ≤ 16 mm)
- Excellent toughness at low temperatures (≥40 J at -20°C)
- Fine grain structure provides high strength-to-weight ratio
- Suitable for heavy structural frameworks, bridges, offshore platforms, and machinery
EN10219 S460MH ERW Pipe Chemical Composition
The chemical composition conforms to EN 10219-1:2006, Table 2 for steel grade S460MH. Maximum limits are given unless a range is specified. Fine grain elements such as Nb, V, Ti, and Al are controlled to ensure weldability and impact toughness.
- Carbon equivalent (CEV) ≤ 0.45 for good weldability
- Low sulfur and phosphorus enhance ductility and cleanliness
| Element | Standard Value (max % unless noted) | Remarks |
|---|---|---|
| Carbon (C) | ≤ 0.16 | - |
| Manganese (Mn) | ≤ 1.70 | - |
| Silicon (Si) | ≤ 0.60 | - |
| Phosphorus (P) | ≤ 0.030 | - |
| Sulfur (S) | ≤ 0.025 | - |
| Niobium (Nb) | ≤ 0.05 | Fine grain forming element |
| Vanadium (V) | ≤ 0.12 | Fine grain forming element |
| Titanium (Ti) | ≤ 0.05 | Fine grain forming element |
| Aluminium (Al, total) | ≥ 0.020 | Sufficient for fine grain practice |
| Nitrogen (N) | ≤ 0.025 | - |
| Chromium (Cr) | ≤ 0.30 | - |
| Nickel (Ni) | ≤ 0.80 | - |
| Molybdenum (Mo) | ≤ 0.20 | - |
| Copper (Cu) | ≤ 0.55 | - |
| CEV (Carbon Equivalent) | ≤ 0.45 | CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15 |
EN10219 S460MH ERW Pipe Thermal and Electrical Physical Properties
Physical properties are typical for low-alloy fine-grain structural steels. They vary slightly with actual composition and microstructure. These values are not part of the EN 10219 standard but are commonly used for engineering calculations.
- Density is used for weight estimation
- Thermal expansion and conductivity are critical in welded structures and fire design
| Property | Typical Value | Unit | Test Condition / Remarks |
|---|---|---|---|
| Density (ρ) | 7850 | kg/m³ | At 20°C |
| Modulus of elasticity (E) | 210 | GPa | Tension / compression, 20°C |
| Shear modulus (G) | ~80 | GPa | Calculated from E and ν |
| Poisson's ratio (ν) | 0.3 | - | Elastic range |
| Thermal expansion coefficient (α) | 12 × 10⁻⁶ | 1/K | 20 – 100°C |
| Thermal conductivity (λ) | ~50 | W/(m·K) | At 20°C |
| Specific heat capacity | ~460 | J/(kg·K) | At 20°C |
| Electrical resistivity (ρ_e) | ~0.22 | µΩ·m | At 20°C |
EN10219 S460MH ERW Pipe Mechanical Properties
Mechanical properties are determined on test pieces taken from the finished hollow section. Values apply to longitudinal direction. Yield strength and tensile strength depend on wall thickness. Impact test is performed at -20°C. Bend test ensures formability.
- All tests performed according to EN 10002-1 (tensile), EN 10045-1 (impact), and EN 10219-1
- Minimum elongation measured on gauge length L₀ = 5.65√S₀
| Property | Required Value | Unit | Test Condition / Remarks |
|---|---|---|---|
| Yield Strength (ReH) | ≥ 460 | MPa | Wall thickness t ≤ 16 mm |
| Yield Strength (ReH) | ≥ 440 | MPa | Wall thickness 16 mm < t ≤ 40 mm |
| Yield Strength (ReH) | ≥ 420 | MPa | Wall thickness 40 mm < t ≤ 65 mm |
| Yield Strength (ReH) | ≥ 400 | MPa | Wall thickness 65 mm < t ≤ 80 mm |
| Tensile Strength (Rm) | 550 – 720 | MPa | All thicknesses |
| Elongation after fracture (A) | ≥ 19 | % | Longitudinal, t ≤ 40 mm, L₀ = 5.65√S₀ |
| Elongation after fracture (A) | ≥ 17 | % | Longitudinal, t > 40 mm |
| Impact Energy (KV) | ≥ 40 | J | At -20°C, longitudinal, Charpy V-notch |
| Bend Test (180°) | No cracks or defects; d = 2.0 t | - | Wall thickness t ≤ 16 mm |
| Bend Test (180°) | No cracks or defects; d = 3.0 t | - | Wall thickness t > 16 mm |
EN10219 S460MH ERW Pipe Fully Equivalent Material Standards and Replaceable Grade Designations
| Country / Region | Standard | Grade | Remarks |
|---|---|---|---|
| European Union | EN 10219-1:2006 | S460MH | Cold-formed welded structural hollow section; original specification |
| United Kingdom | BS EN 10219-1:2006 | S460MH | Identical to EU standard (British adoption) |
| Germany | DIN EN 10219-1:2006 | S460MH | Identical adoption |
| France | NF EN 10219-1:2006 | S460MH | Identical adoption |
| Italy | UNI EN 10219-1:2006 | S460MH | Identical adoption |
| Spain | UNE EN 10219-1:2006 | S460MH | Identical adoption |
EN10219 S460MH ERW Pipe Application Introduction
EN10219 S460MH ERW pipes are designed for heavy structural applications requiring high strength, low-temperature toughness, and good weldability. The fine grain structure enables lighter structures without compromising safety. Typical usage spans civil engineering, offshore, machinery, and transport.
Product Applications: Welded circular, square and rectangular hollow sections (ERW pipes), Structural columns, beams, and trusses, Bridge piers and arches, Offshore platform legs and braces, Crane booms and lattice structures, Piling pipes for foundations, Architectural exposed steelwork
Processed into products: Main chord members in trusses, Compression struts and columns, Bracing elements in high-strength frames, Flanges and webs of built-up sections, Boom sections in mobile and tower cranes, Spud cans and leg braces in jack-up rigs, Wind turbine tower transition pieces, Connecting gusset plates and end plates
Application industries: Building and infrastructure construction, Bridge engineering, Offshore and marine structures, Wind turbine towers and monopiles, Heavy machinery and crane manufacturing, Transmission towers and telecommunication masts, Mining and earthmoving equipment, Structural frameworks for power plants and industrial facilities
EN10219 S460MH ERW Pipe Similar / Alternative Materials with Comparable Strength
| Country / Region | Standard | Grade | Remarks |
|---|---|---|---|
| Europe | EN 10210-1 | S460NH | Hot-finished hollow section, similar chemistry and strength, normalized (-20°C toughness) |
| USA | ASTM A500 / A500M | Grade C | Cold-formed welded hollow section, yield strength 345 MPa (50 ksi) – lower strength, not a direct substitute for S460MH |
| USA | ASTM A572 / A572M | Grade 60 [415] / Grade 65 [450] | High-strength low-alloy structural steel plate, yield approx 415-450 MPa, not hollow section |
| Japan | JIS G3466 | STKR490 | Square / rectangular hollow section, yield 325 MPa; much lower strength, only for light-duty replacement |
| China | GB/T 6728 | Q345D / Q390D / Q420D | Cold-formed hollow sections, yield 345-420 MPa; Q420D is closest to S460MH but still 40 MPa lower |
| Europe | EN 10219-1 | S420MH / S460MH | S420MH may substitute if lower strength acceptable; S460MH is the desired grade |
Notes:
Additional considerations:
- Welding procedures should follow EN 1011-2 recommendation, preheat may be required for thick sections.
- For dynamic loading, fatigue design per EN 1993-1-9 is necessary.
- Surface protection (paint, hot-dip galvanizing) can be applied. Over-galvanizing of high-silicon steels may affect coating thickness; this steel's Si ≤ 0.60% keeps it within acceptable limits.
- Dimensional tolerances, straightness, and corner radii are as per EN 10219-2.
- Material is fully recyclable and complies with CE marking requirements under the Construction Products Regulation (EU) No. 305/2011.
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