ASTM A202 Grade B is a chromium-molybdenum alloy steel plate designed for welded pressure vessels operating at intermediate temperatures. Compared with Grade A, A202 Grade B provides higher strength and improved creep resistance, making it suitable for boilers, heat exchangers, and petrochemical equipment requiring stable performance under elevated temperature and pressure. Its balanced alloy design ensures reliable weldability and long-term structural integrity.
Chemical Composition

Element	C	Mn	P	S	Si	Cr	Mo
Max %	≤0.23	0.90–1.50	≤0.035	≤0.035	≤ 0.50	0.80–1.15	0.45–0.60

 
Mechanical Properties

Yield Strength	Tensile Strength	Elongation
≥ 275 MPa	515–655 MPa	≥18%

 
Dimensions
Thickness: 3–150 mm
Width: 1220–4200 mm
Length: 5000–18000 mm Supports custom cutting and shaping.
 
Stock & Processing
Regular stock available for A202 Grade B
Cutting, drilling, welding, bending, machining
Custom dimensions and shapes
Fast delivery for bulk and project orders
Global supply capability
 
Applications
Medium-temperature pressure vessels
Industrial boilers
Petrochemical reactors
Heat exchangers and process equipment
Welded structural components requiring Cr-Mo alloy strength
 
Certification & Support
Complies with ASTM A202/A202M
Mill Test Certificate EN 10204 3.1 / 3.2 available
Third-party inspection: BV / LR / ABS / DNV / SGS
Technical support for material selection and fabrication