EN10219 S460MH LSAW Pipe
EN10219 S460MH LSAW Pipe - High-Strength Welded Structural Hollow Section for Demanding Engineering Applications
Comprehensive technical data for EN10219 S460MH LSAW pipe: chemical composition, mechanical properties, physical properties, international equivalents and application guide for structural hollow sections.
Cold forming, welding (SAW), possible post-weld heat treatment; suitable for drilling, cutting, bending, and machining
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EN10219 S460MH LSAW Pipe Introduction
EN10219 S460MH LSAW pipe is a cold-formed welded structural hollow section produced by longitudinal submerged arc welding (LSAW). Manufactured from thermomechanically rolled fine-grain steel, it delivers a minimum yield strength of 460 MPa, excellent toughness at -20 °C, and good weldability. S460MH combines high strength with reduced weight, making it ideal for heavy-duty structures, offshore platforms, bridges, cranes, and wind turbine towers. The material meets the technical delivery conditions of EN 10219-1 and utilizes S460M steel according to EN 10025-4, ensuring consistent mechanical properties and chemical composition. Delivery condition is normally as-welded or stress-relief annealed according to the purchaser's requirements.
EN10219 S460MH LSAW Pipe Chemical Composition
Values are maximum unless indicated as a range. The chemical composition of S460MH is based on the base steel grade S460M according to EN 10025-4 used in EN 10219-1. Fine-grain practice is used, with restricted carbon equivalent to guarantee weldability and toughness.
| Element | Value (max, %) | Remarks |
|---|---|---|
| C | 0.16 | For t ≤ 40 mm; higher thickness may have adjusted max values |
| Si | 0.60 | If not stated otherwise by deoxidation method |
| Mn | 1.70 | Maximum; may be adjusted for CEV control |
| P | 0.030 | For long products; for flat products 0.025 |
| S | 0.025 | Max for all product forms |
| N | 0.015 | Total nitrogen |
| Al (total) | ≥ 0.020 | Minimum soluble aluminium content for grain refinement |
| Nb | 0.05 | Microalloying for grain refinement and precipitation strengthening |
| V | 0.12 | Microalloying element |
| Ti | 0.05 | Microalloying element |
| Cr | 0.30 | Residual or alloying |
| Ni | 0.80 | May be added for toughness |
| Mo | 0.20 | Optional element |
| Cu | 0.55 | Residual; may be restricted for specific applications |
| CEV | 0.47 – 0.53 | Typical carbon equivalent value; depends on thickness, see EN 10025-4 |
EN10219 S460MH LSAW Pipe Physical Properties
Physical properties are typical for low-alloy structural steels at ambient temperature and are not mandatory requirements of EN 10219. They are provided for design calculations. Actual values may vary slightly with composition and manufacturing process.
| Property | Standard Value | Unit | Test Conditions / Remarks |
|---|---|---|---|
| Density (ρ) | 7850 | kg/m³ | Room temperature |
| Modulus of elasticity (E) | 210 | GPa | Tension/compression at 20 °C |
| Shear modulus (G) | approx. 81 | GPa | Calculated from E and ν |
| Poisson's ratio (ν) | 0.3 | - | At 20 °C, elastic range |
| Thermal expansion coefficient (α) | 12.0 × 10⁻⁶ | 1/K | Between 20 °C and 100 °C |
| Thermal conductivity (λ) | 45 – 50 | W/(m·K) | At 20 °C; depends on exact chemistry |
| Specific heat capacity (cₚ) | 460 | J/(kg·K) | At 20 °C |
| Electrical resistivity (ρₑ) | 0.20 – 0.25 | µΩ·m | At 20 °C, typical for low-alloy steel |
EN10219 S460MH LSAW Pipe Mechanical Properties
Properties apply to the finished hollow section after cold forming and welding. For wall thicknesses outside the listed ranges, different values may apply as per EN 10219-1. The material meets the optional requirement for impact testing at -20 °C (S460MH, minimum 27 J). Bending test is performed with weld located in the tension zone.
| Property | Standard Value | Unit | Test Conditions / Remarks |
|---|---|---|---|
| Yield strength (ReH) | 460 (t ≤ 16) | MPa | Wall thickness ≤ 16 mm |
| Yield strength (ReH) | 440 (16 < t ≤ 40) | MPa | Wall thickness 16–40 mm |
| Yield strength (ReH) | 420 (40 < t ≤ 63) | MPa | Wall thickness 40–63 mm (if applicable) |
| Tensile strength (Rm) | 530 – 720 | MPa | All thicknesses up to 63 mm |
| Elongation (A) | ≥ 17 (t ≤ 40) | % | Longitudinal, gauge length L₀ = 5.65√S₀ |
| Elongation (A) | ≥ 15 (40 < t ≤ 63) | % | Longitudinal, for thicker walls |
| Impact energy (KV₂) | ≥ 27 | J | At -20 °C, longitudinal, Charpy V-notch, average of 3 tests |
| Bending test | No cracks after 180° bending | - | Mandrel diameter = 3t (t = wall thickness), weld in tension zone |
EN10219 S460MH LSAW Pipe Direct Equivalent Standards and Substitute Grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Europe | EN 10219-1 | S460MH | The specified grade – LSAW structural hollow section |
| International | ISO 630-3 | E460 | Similar chemistry and strength for flat/long products; not a hollow section standard |
| Japan | JIS G3106 | SM570 | Comparable yield and tensile strength in plates, but separate welding and impact requirements |
EN10219 S460MH LSAW Pipe Application Introduction
EN10219 S460MH LSAW pipe is designed for heavily loaded structures where high strength-to-weight ratio is essential. The fine-grain microstructure guarantees reliable toughness in cold climates and offshore environments. Typical applications span across civil, marine, energy, and industrial sectors. Its good weldability (CEV ≤ 0.53) enables safe fabrication in the workshop and on site.
Product Applications: LSAW (longitudinal submerged arc welded) pipes from 16″ (406 mm) up to 64″ (1625 mm) outer diameter and wall thicknesses up to 65 mm, Cold-formed square/rectangular hollow sections in standard EN 10219 S460MH, Circular hollow sections (CHS) for chords and braces in truss structures, Ready-to-use pipe spools and fabricated tubular components
Processed into products: Bridge girders and arch ribs, Wind tower shell sections and door frames, Offshore jacket legs and braces, Crane lattice booms and telescopic sections, Piling tubes for deep foundations, Conveyor gallery support structures, Pressure-containing parts within structural design (non-pressure service)
Application industries: Civil engineering and infrastructure (bridges, high-rise buildings, stadiums), Offshore oil & gas (platform legs, jackets, topside structures), Renewable energy (wind turbine towers, transition pieces, monopiles), Heavy machinery and mining equipment (crane booms, excavator arms), Shipbuilding (derricks, masts, deck structures), Industrial plant construction (pipe racks, structural frameworks)
EN10219 S460MH LSAW Pipe Similar / Alternative Materials with Comparable Performance
| Country/Region | Standard | Grade | Analysis / Remarks |
|---|---|---|---|
| Europe | EN 10025-4 | S460M | Base steel for flat and long products; similar chemistry but not directly for welded hollow sections |
| USA | ASTM A572/A572M | Grade 65 [450] | Yield strength 450 MPa (65 ksi), lower than 460 MPa; not identical but often used for structural pipes |
| Japan | JIS G3444 | STK540 | Carbon steel tube for structural purposes with min. tensile strength 540 MPa; yield strength typically lower |
| China | GB/T 1591 | Q460D | High strength low alloy structural steel, similar strength level and impact toughness |
Notes:
All data compiled from EN 10219-1:2006 and EN 10025-4:2019. For specific projects, the purchaser should confirm supplementary requirements (e.g., through-thickness properties, stricter CEV, Z-quality) directly with the steel mill. Heat treatment after welding might alter mechanical properties; it is recommended to verify toughness after PWHT if required. The values in the mechanical and physical properties tables are typical and may vary within the standard's permitted range.
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