P355Q steel plate is a weldable, fine-grain, quenched and tempered steel for pressure equipment, meeting European standard EN 10028-6, known for excellent weldability, plasticity, and impact strength, with a minimum yield strength of 355 MPa (hence the "355"). It's used in high-temperature pressure vessels, boilers, and other demanding applications requiring high strength and reliability, often supplied as P355QH or P355QL1/QL2 variants for different impact toughness levels.
Supplementary Technology: HIC Test | NACE MR0175 | Z15 | Z25 | Z35 |
Thickness: 6MM to 300MM,
Width: 1500mm to 4050mm,
Length: 3000mm to 15000mm
Technical Requirements & Additional Services for P355Q steel plate:
High tension test
Low temperature impacting test
Simulated post-welded heat treatment (PWHT)
Ultrasonic test under EN 10160,ASTM A435,A577,A578
Issued Orginal Mill test certificate under EN 10204 FORMAT 3.1/3.2
Shot blasting and Painting,Cutting and welding as per end user's demands
Chemical Composition
|
P355Q Chemical Composition |
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|
Grade |
The Element Max (%) |
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|
C |
Si |
Mn |
P |
S |
N |
B |
|
|
P355Q |
0.16 |
0.4 |
1.5 |
0.025 |
0.015 |
0.015 |
0.005 |
|
Mo |
Cu |
Nb |
Ni |
Ti |
V |
Zr |
|
|
0.25 |
0.3 |
0.05 |
0.5 |
0.03 |
0.06 |
0.05 |
|
Mechanical Property
|
Grade |
P355Q Mechanical Property |
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|
Thickness |
Yield |
Tensile |
Elongation |
|
|
P355Q |
mm |
Min Mpa |
Mpa |
Min % |
|
6-50 |
355 |
490-630 |
22% |
|
|
50-100 |
335 |
490-630 |
22% |
|
|
100-150 |
315 |
450-590 |
22% |
|
