Common size on stock, Special sizes needs new production.Can cut to Size, Cut to Shape.
EMERSONMETAL
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Our P500Q, P460Q and P355Q steel plates are high-quality quenched and tempered (Q+T) weldable fine-grained steels that fully comply with the EN 10028-6 standard. These steel plates are specifically designed for high-pressure boiler and pressure vessel applications and undergo rigorous ultrasonic testing (UT) to ensure internal integrity and a defect-free structure.
These plates are available in a wide range of thicknesses – from 10 mm to 350 mm for P500Q/P460Q, and from 10 mm to 750 mm for P355Q.
Steel Grade | Standard | Delivery Condition | Thickness Range | Key Characteristics |
P355Q | EN 10028-6 | Quenched & Tempered (Q+T) | 10 – 750 mm | Excellent weldability, moderate strength, cost-effective for medium pressure |
P460Q | EN 10028-6 | Quenched & Tempered (Q+T) | 10 – 350 mm | High yield strength, good low-temperature toughness |
P500Q | EN 10028-6 | Quenched & Tempered (Q+T) | 10 – 350 mm | Ultra-high strength, superior impact resistance, designed for extreme pressure |
We can supply all types of steel plates, especially pressure vessel boiler steel plate, P500Q 10-350mm thick UT test boiler pressure vessel steel plate
For pressure vessel steel plate, the grades can supply are as below: the materials, thickness, width, length, and delivery condition are as below:
CATEGORY | STANDARD | GRADES AND MATERIALS | TECHNICAL PROPERTY IS ASSURED THICKNESS | UT TEST THICKNESS | CHEMICAL COMPOSITION IS ASSURED THICKNESS | DELIVERY CONDITION |
PRESSURE VESSEL AND BOILER STEEL PLATE | EN10028 | P235GH、P265GH、P295GH、P355GH 16Mo3、18MnMo4-520MnMoNi4-5 13CrMo4-5、13CrMoSi5-5、10CrMo9-10 12CrMo9-10、13CrMoV9-10 P275NH/NL1/NL2、P355N/NH/NL1/NL2 P460NH/NL1/NL2、P355M/ML1/ML2 P420M/ML1/ML2、P460M/ML1/ML2 P355Q、P460Q、P500Q | 10～300 | 10～350 | 10～750 | AR、CR、TMCP N、N+T、Q+T |
Production Dimension: Thickness: 10mm-750mm, width 1500mm-3700mm, length 3000mm-18000mm, the special sizes over this dimension can be produced by customization. Delivery Condition: when assuring the steel plate technical property, the steel plate can be delivered at hot rolled, controlled rolled, normalized, annealled, tempered, normalized and tempered, Q+T these delivery conditions. For the grades not shown in the material list, can send to the technical department for checking for production. | ||||||
P460Q P355Q P500Q Grade Chemical Composition and Technical Property is as below：
Standard | C % max | Si max | Mn max | P max | S max | Mo max | Ni max | Cr max | tensile strength（MPa） | yield strength（MPa） | Elongation% |
P355Q | 0.16 | 0.4 | 1.5 | 0.025 | 0.015 | 0.25 | 0.5 | 0.3 | 450-630 | >315 | ≥22 |
P460Q | 0.18 | 0.5 | 1.7 | 0.025 | 0.015 | 0.5 | 1 | 0.5 | 550-720 | >400 | >19 |
P500Q | 0.18 | 0.6 | 1.7 | 0.025 | 0.015 | 0.7 | 1.5 | 1 | 540-770 | ≥440 | ≥17 |
Standard Packaging: Bare bundles secured with steel straps, suitable for container and bulk vessel loading.
Enhanced Protection: Waterproof paper wrapping + steel frame packaging available for ocean transport.
Marking: Each plate is clearly marked with heat number, grade, dimensions, rolling direction, and standard reference.
Shipping Terms: FOB, CIF, CFR, DAP available. Delivery time typically 15–45 days depending on quantity and specification.
Q: What is the difference between P355Q, P460Q, and P500Q?
A: The primary difference lies in minimum yield strength: P355Q requires 355 MPa, P460Q requires 460 MPa, and P500Q requires 500 MPa. Higher grades offer greater strength but may have slightly different toughness requirements. P355Q is also available in much thicker plates (up to 750mm) compared to P460Q/P500Q (up to 350mm).
Q: Are P355Q, P460Q, and P500Q suitable for low-temperature environments?
A: Yes. The standard grades are tested at -20°C. For applications requiring lower temperatures, we offer the QL1 and QL2 variants (e.g., P355QL1, P460QL1, P500QL1), which are impact-tested at -40°C and -60°C respectively.
Q: What is the maximum thickness available for P500Q?
A: We supply P500Q steel plates from 10mm up to 350mm in thickness. For requirements beyond 350mm, please contact our technical team to discuss feasibility and potential alternatives.
Q: Do you provide cutting and beveling services?
A: Yes. We offer CNC flame cutting, laser cutting, and edge beveling services. We can deliver plates in custom dimensions and shapes, including weld preparation bevels, to reduce your downstream fabrication time and material waste.
Q: What is the typical delivery time?
A: For standard specifications and quantities, delivery is typically 15–30 days ex-mill. For large orders, special thicknesses, or third-party inspection requirements, delivery may extend to 45 days. We maintain stock for common sizes to enable faster shipment.
