P355Q and P355QH steel plate are European standard boiler steel plates EN 10028-6, which are tempered and weldable fine-grained steel.
P355Q is a European standard quenched and tempered weldable fine-grain structural steel, corresponding to the material number 1.8866 and conforming to the EN 10028-6 standard. This specialized alloy steel is designed for pressure equipment and is known for its excellent plasticity, toughness, cold-bending properties, and weldability.
Key Features and Grades Of Pressure Steel Plate EN 10028
1.Technical Specifications:
- Standard: EN 10028-6
- Material Number: 1.8866
- Heat Treatment: Quenched and Tempered
2.Boiler Steel Plate EN 10028 Grades Based on Impact Properties:
- P355Q: Basic grade
- P355QH: Enhanced impact properties
- P355QL1: Higher impact properties at lower temperatures
- P355QL2: Superior impact properties at even lower temperatures
EN10028 P355Q P355QH Carbon Steel Plate Size：
Thickness:6MM to 300MM,
Width:1500mm to 4050mm.
Length:3000mm to 15000mm
P355Q and P355QH Carbon steel plate Applications
P355Q steel plates are widely used in the manufacture of various types of pressure equipment, including:
Reactors
Heat Exchangers
Separators
Spherical Tanks
Oil and Gas Tanks
LPG Tanks
Nuclear Reactor Pressure Vessels
Turbine Casings
P355Q plate mechanical properties
| Grade | Thickness mm | Yield strength(MPa) | Tensile strength (MPa) | Elongation A(％) |
| P355Q | ≤50 | ≥355 | 490-630 | ≥22 |
| 50-100 | ≥335 | 450-590 | ||
| 100-150 | ≥315 | 450-590 |
P355QH plate mechanical properties
| Grade | Delivery state | Thickness mm | Mechanical properties | |
| P355QH | quenching and tempering | <5 | ReH(MPa) | ≥355 |
| Rm(MPa) | 490～630 | |||
| A(%) | ≥22 | |||
| P355QH | 5~50 | ReH(MPa) | ≥355 | |
| Rm(MPa) | 490～630 | |||
| A(%) | ≥22 | |||
| Impact temperature ℃ | -20 | |||
| Akv(J) | ≥27 | |||
| P355QH | >50~100 | ReH(MPa) | ≥335 | |
| Rm(MPa) | 490～630 | |||
| A(%) | ≥22 | |||
| Impact temperature ℃ | -20 | |||
| Akv(J) | ≥27 | |||
| P355QH | >100~150 | ReH(MPa) | ≥315 | |
| Rm(MPa) | 450～590 | |||
| A(%) | ≥22 | |||
| Impact temperature ℃ | -20 | |||
| Akv(J) | ≥27 | |||
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