High‑Strength Pressure Vessel Steel Plate is designed for high‑pressure and heavy‑load applications, where standard pressure vessel steels cannot provide sufficient strength or structural stability.
These steels offer:
High yield and tensile strength
Excellent impact toughness
Superior weldability for thick‑wall fabrication
Stable performance under high pressure and temperature
Enhanced resistance to fatigue and stress‑related failures
They are widely used in high‑pressure reactors, industrial pressure vessels, petrochemical equipment, and heavy‑duty boiler systems.
🟪 Product Specifications
Thickness: 6 – 200 mm
Width: 1500 – 3000 mm
Length: Custom lengths available
Delivery Conditions:
Normalized
Quenched & Tempered
Thermo‑Mechanically Rolled
UT Testing (A/B/C/D) available
🟪 Key Features
High yield and tensile strength for high‑pressure applications
Excellent toughness for thick‑wall and heavy‑duty vessels
Good weldability and formability
Stable performance under high‑pressure and high‑temperature conditions
Suitable for large reactors, separators, and industrial pressure systems
Q370R — High‑strength pressure vessel steel for heavy‑duty applications
🟪 Mechanical Properties (Typical)
Grade
Yield Strength
Tensile Strength
Impact Toughness
Notes
A537 Cl 1
≥345 MPa
485–620 MPa
≥27 J
High‑strength PV steel
A537 Cl 2
≥415 MPa
550–690 MPa
≥27 J
Higher strength, Q&T
A202 Gr B
≥345 MPa
485–620 MPa
≥27 J
Alloy high‑strength steel
P460NL2
≥460 MPa
550–720 MPa
≥27 J
EN high‑strength PV steel
Q370R
≥370 MPa
510–650 MPa
≥27 J
GB high‑strength PV steel
🟪 Chemical Composition (Typical)
Grade
C (%)
Mn (%)
Si (%)
Cr (%)
Mo (%)
Notes
A537 Cl 1
≤0.24
0.70–1.60
≤0.50
—
—
High‑strength PV steel
A537 Cl 2
≤0.20
1.00–1.60
≤0.50
—
—
Q&T high‑strength steel
A202 Gr B
≤0.23
0.70–1.60
≤0.50
—
—
Alloy high‑strength steel
P460NL2
≤0.20
1.00–1.70
≤0.50
—
—
EN high‑strength PV steel
Q370R
≤0.20
≤1.70
≤0.50
—
—
GB high‑strength PV steel
🟪 Physical Properties (General)
Density: ~7.85 g/cm³
Modulus of Elasticity: ~210 GPa
Thermal Expansion Coefficient: ~11–13 × 10⁻⁶ /K
Thermal Conductivity: ~40–50 W/(m·K)
High‑Pressure Fatigue Resistance: Excellent
🟪 Applications
High‑pressure reactors
Thick‑wall pressure vessels
Petrochemical separators
Industrial boilers
High‑pressure storage tanks
Heavy‑duty pressure systems
🟪 Why Use It
High‑strength pressure vessel steels are essential for equipment operating under high pressure, heavy load, or thick‑wall construction, where standard pressure vessel steels cannot meet structural or safety requirements.
They provide:
Higher load‑bearing capacity
Improved safety margins
Better performance under pressure cycling
Compliance with high‑pressure design codes
🟪 Why Choose WelSteels
Full range of high‑strength pressure vessel steel grades
Expertise in Q&T, alloy, and high‑pressure steels
Precision cutting, beveling, rolling, and heavy‑plate processing
Third‑party inspection available (SGS / BV / TUV)
Export‑grade seaworthy packaging and stable global supply
