EN10028-5 P460M thermomechanically rolled pressure vessel steel plate
EN10028-5 P460M – TMCP Fine-Grain Pressure Vessel Steel Plate (460 MPa)
Detailed material data sheet for P460M steel plate according to EN 10028-5: fine-grain thermomechanically rolled steel for pressure vessels and boilers with minimum yield strength 460 MPa.
Welding (all common methods), cold forming, hot forming, machining, stress relieving
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EN10028-5 P460M thermomechanically rolled pressure vessel steel plate Introduction
P460M is a fine-grain structural steel belonging to EN 10028-5, intended for pressure vessels and boilers. It is delivered in the thermomechanically rolled (+M) condition, which grants an excellent combination of high strength (minimum yield 460 MPa), good toughness at low temperatures, and reliable weldability. Thanks to controlled rolling and microalloying, P460M offers uniform mechanical properties across a wide thickness range and can be used for welded pressure equipment operating under moderate to elevated service temperatures. Typical applications include storage spheres, industrial boilers, heat exchangers, and chemical reactors.
EN10028-5 P460M thermomechanically rolled pressure vessel steel plate Chemical Composition
All values correspond to the ladle analysis limits defined in EN 10028-5:2017. The steel is microalloyed with Nb, V and Ti to achieve fine grain refinement during thermomechanical rolling. Limits are expressed as maximum unless a range is given.
| Chemical Element | Value (wt%) | Notes |
|---|---|---|
| C | ≤ 0.18 | |
| Si | ≤ 0.60 | |
| Mn | 1.00 – 1.70 | Depending on thickness |
| P | ≤ 0.025 | |
| S | ≤ 0.010 | |
| Altotal | ≥ 0.020 | Minimum total aluminum |
| N | ≤ 0.025 | |
| Nb | ≤ 0.05 | |
| V | ≤ 0.10 | |
| Ti | ≤ 0.03 | |
| Cr | ≤ 0.30 | |
| Cu | ≤ 0.30 | |
| Mo | ≤ 0.10 | |
| Ni | ≤ 0.50 | |
| CEV | ≤ 0.43 | t ≤ 100 mm |
EN10028-5 P460M thermomechanically rolled pressure vessel steel plate Thermal and Electrical Physical Properties
The following data are typical values for fine-grain structural steels of similar composition and processing condition. They are not mandatory requirements of EN 10028-5 but serve as an engineering guide. Properties depend on temperature and product form.
| Property | Typical Value | Unit | Test Condition / Temperature |
|---|---|---|---|
| Density (ρ) | 7850 | kg/m³ | 20 °C |
| Modulus of Elasticity (E) | 205 | GPa | 20 °C |
| Shear Modulus (G) | 80 | GPa | 20 °C |
| Poisson Ratio (ν) | 0.30 | - | 20 °C |
| Thermal Expansion Coefficient (α) | 12.0 | 10⁻⁶/K | 20 – 100 °C |
| Thermal Expansion Coefficient (α) | 13.0 | 10⁻⁶/K | 20 – 200 °C |
| Thermal Expansion Coefficient (α) | 13.5 | 10⁻⁶/K | 20 – 300 °C |
| Thermal Conductivity (λ) | 45 | W/(m·K) | 20 °C |
| Thermal Conductivity (λ) | 42 | W/(m·K) | 100 °C |
| Specific Heat Capacity (cp) | 460 | J/(kg·K) | 20 °C |
| Electrical Resistivity (ρe) | 0.25 | µΩ·m | 20 °C |
EN10028-5 P460M thermomechanically rolled pressure vessel steel plate Mechanical Properties
Mechanical requirements according to EN 10028-5. Tensile and impact tests are performed on transverse specimens. The specified values apply to the delivery condition (+M). For thicknesses beyond 100 mm the values must be agreed at the time of enquiry and order.
| Property | Required Value | Unit | Test Condition / Thickness |
|---|---|---|---|
| Yield Strength (ReH) | ≥ 460 | MPa | t ≤ 16 mm |
| Yield Strength (ReH) | ≥ 445 | MPa | 16 < t ≤ 40 mm |
| Yield Strength (ReH) | ≥ 430 | MPa | 40 < t ≤ 63 mm |
| Yield Strength (ReH) | ≥ 410 | MPa | 63 < t ≤ 80 mm |
| Yield Strength (ReH) | ≥ 390 | MPa | 80 < t ≤ 100 mm |
| Tensile Strength (Rm) | 550 – 720 | MPa | t ≤ 100 mm |
| Elongation (A5) | ≥ 17 | % | t ≤ 100 mm, transverse |
| Impact Energy (KV2) | ≥ 40 | J | -20 °C, transverse |
| Bend Test (180°) | D = 3t | - | t ≤ 16 mm |
| Bend Test (180°) | D = 4t | - | 16 < t ≤ 100 mm |
EN10028-5 P460M thermomechanically rolled pressure vessel steel plate Exactly Identical Material Standards and Replaceable Grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| EU (harmonized) | EN 10028-5 | P460M | Original specification for thermomechanically rolled grade |
| International | ISO 9328-3 | P460M | Identical designation and requirements |
| Germany | DIN EN 10028-5 | P460M | Direct adoption of EN standard |
| France | NF EN 10028-5 | P460M | Direct adoption of EN standard |
| United Kingdom | BS EN 10028-5 | P460M | Direct adoption of EN standard |
| Italy | UNI EN 10028-5 | P460M | Direct adoption of EN standard |
| Spain | UNE EN 10028-5 | P460M | Direct adoption of EN standard |
EN10028-5 P460M thermomechanically rolled pressure vessel steel plate Application Introduction
P460M is especially suited for welded pressure equipment where high strength, good low-temperature toughness and reliable weldability are required. It is used across a broad range of thicknesses in both shop-fabricated and field-erected vessels.
Product Applications: Pressure vessels (vertical/horizontal, spheres), Boiler shells and drums, Heat exchangers and condensers, Large-diameter storage tanks with pressure, Process piping and manifolds
Processed into products: Cylindrical shells and courses, Dished / elliptical / flat heads, Nozzles and flanges, Stiffening rings and support skirts, Tube sheets and dividing plates, Manhole and inspection port reinforcements
Application industries: Oil & Gas (onshore/offshore pressure storage, separation units), Power Generation (boiler drums, steam separators), Chemical & Petrochemical (reactors, columns, heat exchangers), Water Treatment (pressure filters, vessels), Industrial Equipment Manufacturing
EN10028-5 P460M thermomechanically rolled pressure vessel steel plate Similar or Closely Related Steels
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Europe | EN 10028-3 | P460NH, P460NL1, P460NL2 | Fine-grain normalized grades with similar strength (Ni added for low-temperature toughness in NL1/NL2) |
| Europe (structural) | EN 10025-4 | S460M, S460ML | TMCP structural steels; comparable mechanical properties but not intended for pressure equipment |
| USA / ASME | ASTM A537 Class 2 / ASME SA-537 Cl.2 | 537 CL 2 | Heat-treated carbon-manganese-silicon steel; yield ≥414 MPa, similar applications but different production route |
| Japan | JIS G3115 | SPV490 | Pressure vessel steel with minimum yield ~490 MPa; chemical composition slightly different |
Notes:
- Preheat and interpass temperature control may be necessary depending on thickness and welding process to avoid hydrogen cracking.
- Post-weld heat treatment (PWHT) is generally not required for TMCP condition but can be applied by agreement for thick sections.
- CEV ≤ 0.43 ensures good weldability without special precautions provided low-hydrogen consumables are used and plate temperature is adequate.
- Material can be ordered with additional testing (e.g., through-thickness tensile, ultrasonic examination) according to EN 10028-5 options.
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