🟧 Product Overview
ASTM A533 is a high‑strength alloy steel used for pressure vessels and critical welded structures operating under high pressure and elevated temperatures. It is widely applied in nuclear power, petrochemical equipment, industrial boilers, and heavy‑duty pressure systems.
A533 is produced in Classes A, B, C, D, and E, each offering different combinations of strength, toughness, and alloy composition. Class B is the most commonly used grade for pressure vessel applications.
🟧 Standards
ASTM A533 – Alloy Steel Plates for Pressure Vessels
Related Standards: ASTM A537, ASTM A387, EN 10028, JIS G3103, GB Q345R/Q370R
🟧 International Pressure Vessel Steel Standards Comparison Table
Country Standard Common Grades China GB 713 / GB 19189 Q245R, Q345R, Q370R America ASTM A516 / A515 / A537 / A387 / A203 / A204 / A285 / A202 A516 Gr60/70, A515, A537, A387, A203, A204, A285, A202 Germany DIN 17155 HII, 19Mn6 Japan JIS G3103 P235GH, P265GH, P295GH, P355GH France NF A 36‑205 A42CP, A48CP Britain BS 1501 161‑430A/B International (EN) EN 10028 P235GH, P265GH, P355GH
🟧 Available Grades
ASTM A533 Class A
ASTM A533 Class B
ASTM A533 Class C
ASTM A533 Class D
ASTM A533 Class E
🟧 Product Specifications & Available Sizes
Dimensions
Thickness: 3 – 20 mm
Width: 1000 – 2000 mm
Coil ID: 508 mm / 610 mm
Coil OD: 900 – 2000 mm
Coil Weight: 3 – 15 MT
Regular Sizes (mm)
Size Size 3.0 × 1500 × C 5.75 × 1800 × C 3.5 × 1500 × C 5.75 × 2000 × C 3.75 × 1500 × C 7.75 × 2000 × C 4.5 × 1500 × C 7.5–11.75 × 1500 × C
🟧 Chemical Composition (ASTM A533 Class B – typical)
Element Max (%) C 0.25 Mn 1.15–1.50 P 0.025 S 0.025 Si 0.15–0.40 Ni 0.40–1.00 Cr 0.15–0.30 Mo 0.45–0.60
🟧 Mechanical Properties (ASTM A533 Class B – typical)
Property Value Yield Strength ≥ 345 MPa Tensile Strength 550–690 MPa Elongation ≥ 18% Impact Toughness Excellent (heat‑treated alloy steel)
🟧 Physical Properties
Density: 7.85 g/cm³
Modulus of elasticity: 200 GPa
Thermal expansion: 12×10⁻⁶ /K
🟧 Manufacturing Processes
Hot rolling
Normalizing
Quenching & tempering
Pickling
Leveling
Slitting / Cutting to length
Surface oiling
🟧 Primary Industry Usage
Nuclear pressure vessels
High‑pressure boilers
Petrochemical reactors
Industrial pressure systems
Heavy welded structures
High‑temperature and high‑pressure components
🟧 Why Use ASTM A533 Pressure Vessel Steel Coil
Alloy steel with superior strength and toughness
Excellent performance under high pressure and elevated temperatures
Suitable for critical and safety‑related pressure applications
Multiple classes available for different performance requirements
🟧 Why Choose WelSteels
Full range of pressure vessel steel coils
Consistent dimensional accuracy
Custom coil cutting and slitting
SGS / BV inspection available
Export‑grade seaworthy packaging
Reliable delivery for global projects
