EN10219 S460NH ERW Pipe
EN10219 S460NH ERW Pipe: High-Strength Fine-Grain Structural Hollow Section
Comprehensive material data for S460NH electric-resistance-welded pipe per EN 10219, covering chemical composition, mechanical and physical properties, equivalent standards, and application guidance.
Welding, cold forming, hot-dip galvanizing, cutting, drilling, bolting
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EN10219 S460NH ERW Pipe Introduction
S460NH is a non-alloy fine-grain structural steel grade specified in EN 10219 for cold-formed welded structural hollow sections. It is supplied in the normalized or normalized-rolled condition (+N), ensuring a uniform, fine-grained microstructure. This material offers a minimum yield strength of 460 MPa combined with good weldability, toughness, and cold formability. Typical applications include load-bearing structures, bridges, offshore platforms, and heavy machinery where high strength-to-weight ratio and reliability are required. The ERW (Electric Resistance Welded) manufacturing process produces hollow sections in round, square, and rectangular profiles, offering cost-effective solutions for welded constructions.
EN10219 S460NH ERW Pipe Chemical Composition
The chemical composition of S460NH is defined in EN 10219-1:2006. The steel is microalloyed with elements such as niobium, vanadium, and titanium to achieve fine grain strengthening. Maximum limits apply to most elements, while aluminium content is specified as a minimum for grain refinement control. The carbon equivalent value (CEV) is restricted to ensure good weldability.
| Element | Standard Value (%) | Remarks |
|---|---|---|
| C (Carbon) | ≤ 0.20 | Max. |
| Si (Silicon) | ≤ 0.60 | Max. |
| Mn (Manganese) | 0.50 – 1.70 | Range |
| P (Phosphorus) | ≤ 0.030 | Max. |
| S (Sulfur) | ≤ 0.025 | Max. |
| Al (Aluminium, total) | ≥ 0.020 | Min. |
| Nb (Niobium) | ≤ 0.05 | Max. |
| V (Vanadium) | ≤ 0.12 | Max. |
| Ti (Titanium) | ≤ 0.05 | Max. |
| Cr (Chromium) | ≤ 0.30 | Max. |
| Ni (Nickel) | ≤ 0.80 | Max. |
| Mo (Molybdenum) | ≤ 0.20 | Max. |
| Cu (Copper) | ≤ 0.55 | Max. |
| N (Nitrogen) | ≤ 0.025 | Max. |
| CEV (Carbon Equivalent) | ≤ 0.53 | CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15 |
EN10219 S460NH ERW Pipe Physical Properties
Physical properties are not specified in EN 10219 but are typical for non-alloy structural steels. The values provided below are representative for design calculations. Thermal conductivity and electrical resistivity vary with temperature; room-temperature values are given.
| Property | Typical Value | Unit | Test Condition / Remarks |
|---|---|---|---|
| Density (ρ) | 7850 | kg/m³ | At 20 °C |
| Modulus of Elasticity (E) | 210 | GPa | At 20 °C |
| Shear Modulus (G) | 81 | GPa | At 20 °C |
| Poisson's Ratio (ν) | 0.30 | — | At 20 °C |
| Thermal Expansion Coefficient (α) | 12.0 × 10⁻⁶ | 1/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 (ρₑ) | 0.15 × 10⁻⁶ | Ω·m | At 20 °C |
EN10219 S460NH ERW Pipe Mechanical Properties
Mechanical properties are specified in EN 10219-1 for hollow sections. Yield strength, tensile strength, elongation, and impact energy are verified on longitudinal or transverse test pieces. The values given below are for the delivery condition +N. Bending tests are performed to confirm ductility and forming quality.
| Property | Standard Required Value | Unit | Test Condition |
|---|---|---|---|
| Yield Strength (ReH) | 460 | MPa | Wall thickness ≤ 16 mm |
| Yield Strength (ReH) | 440 | MPa | 16 mm < t ≤ 40 mm |
| Yield Strength (ReH) | 430 | MPa | 40 mm < t ≤ 63 mm |
| Yield Strength (ReH) | 410 | MPa | 63 mm < t ≤ 80 mm |
| Yield Strength (ReH) | 400 | MPa | 80 mm < t ≤ 100 mm |
| Tensile Strength (Rm) | 540 – 720 | MPa | All thicknesses |
| Elongation (A) | 17 (longitudinal) / 15 (transverse) | % | L₀ = 5.65√S₀, t ≤ 40 mm |
| Elongation (A) | 16 (longitudinal) / 14 (transverse) | % | L₀ = 5.65√S₀, 63 mm ≤ t ≤ 100 mm |
| Impact Energy (KV₂) | ≥ 27 (longitudinal) / 20 (transverse) | J | At -20 °C |
| Bend Test | No cracks – mandrel diameter 2t | — | Wall thickness ≤ 16 mm |
| Bend Test | No cracks – mandrel diameter 3t | — | 16 mm < t ≤ 100 mm |
EN10219 S460NH ERW Pipe Fully Equivalent Standards and Substitutable Grades
| Country / Region | Standard | Grade | Remarks |
|---|---|---|---|
| Europe | EN 10219-1:2006 | S460NH | Cold-formed welded hollow sections (ERW) |
| International | ISO 4951-2:2018 | S460NH | Identical technical delivery conditions |
| Germany | DIN EN 10219-1 | S460NH | Adopted EN standard |
| UK | BS EN 10219-1 | S460NH | Adopted EN standard |
| France | NF EN 10219-1 | S460NH | Adopted EN standard |
| Italy | UNI EN 10219-1 | S460NH | Adopted EN standard |
| Spain | UNE EN 10219-1 | S460NH | Adopted EN standard |
EN10219 S460NH ERW Pipe Application Introduction
S460NH ERW pipe is designed for welded, bolted, or riveted structures subjected to high static and dynamic loads. Its fine-grain structure guarantees consistent mechanical properties and excellent low-temperature toughness, making it suitable for demanding structural applications worldwide.
Product Applications: Structural hollow sections (round, square, rectangular, elliptical), Welded beams and columns, Lattice towers and trusses, Piles and foundation tubulars, Crane booms and mobile equipment frames
Processed into products: Columns, chords, and bracings in steel frames, Bridge girders and arches, Offshore jacket legs and braces, Welded connections with gusset plates, Rotary crane and excavator booms, Transmission poles and lighting masts
Application industries: Building and construction (high-rise frames, stadiums, exhibition halls), Civil engineering (bridges, tunnels, piling, retaining walls), Offshore and marine structures (platforms, jetties, wind turbine foundations), Industrial machinery and crane manufacturing, Transportation equipment (railway cars, truck frames, trailers), Tower and mast construction (telecom, power transmission)
EN10219 S460NH ERW Pipe Similar / Comparable Material Substitutes
| Country / Region | Standard | Grade | Remarks |
|---|---|---|---|
| Europe | EN 10025-3:2019 | S460N / S460NL | Fine-grain plate and sections, similar yield strength, slightly different chemistry |
| Europe | EN 10025-4:2019 | S460M / S460ML | Thermomechanically rolled, comparable strength, improved weldability |
| USA | ASTM A572 / A572M | Grade 65 [450 MPa] | High-strength low-alloy structural steel, yield strength slightly lower |
| USA | ASTM A913 / A913M | Grade 65 [450 MPa] | High-strength low-alloy shapes, comparable toughness |
| Japan | JIS G3106 | SM570 | Welded structural steel, Rm 570-720 MPa, ReH ≥ 460 MPa for thinner sections |
Notes:
Special requirements such as improved atmospheric corrosion resistance (e.g., S460NHW) or higher temperature properties are not covered by this standard and must be agreed upon separately. Additionally, the ERW pipe can be supplied with different end finishes (plain, bevelled) and surface conditions (black, primed, galvanized) as specified in the order. All testing and certification should comply with EN 10219-1 and EN 10219-2.
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