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European standard P355Q vessel plate

1. Introduction of European standard P355Q vessel plate:
P355Q European standard vessel plate is a weldable fine grain quenched and tempered steel for pressure equipment. P355Q steel has excellent plasticity, durability, cold bending performance and welding performance.

2. P355Q vessel plate heat treatment delivery status: quenching + tempering.

3. Chemical composition of P355Q steel plate:

C Si Mn P S N B Cr Cu Mo Nb Ni Ti V
≤0.16 ≤0.4 ≤1.5 ≤0.025 ≤0.01 ≤0.015 ≤0.005 ≤0.3 ≤0.3 ≤0.25 ≤0.05 ≤0.5 ≤0.03 ≤0.06

Remarks: Nb+Ti+V≤0.05; Cr+Cu+Mo≤0.5

4. Mechanical properties of P355Q steel plate:

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

5. Impact properties of P355Q vessel plate:

Grade Thickness (mm) Impact energy KV/J
Test temperature (℃)
-60 -40 -20 0 20
P355Q ≤150 - - 27 40 60
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