ASTM A204 Grade A is a molybdenum‑alloy pressure vessel steel plate designed for medium‑temperature service in boilers, heat exchangers, and petrochemical equipment. With its stable strength, good creep resistance, and reliable weldability, A204 Gr.A is suitable for components requiring moderate heat resistance and long‑term structural stability under elevated temperatures.
Chemical Composition

C	Mn	P	S	Si	Mo
≤0.28	0.40–0.90	≤0.025	≤ 0.025	0.15–0.40	0.45–0.60

 
Mechanical Properties

Property	Yield Strength	Tensile Strength	Elongation
Requirement	≥ 205 MPa	415-550MPa	≥ 20%

 
Dimensions

Thickness	3–150 mm
Width	1220–4200 mm
Length	5000–18000 mm

 

Stock & Processing

Regular stock for A204 Grade A
Cutting, drilling, welding, bending, machining
Custom dimensions available
Fast delivery for project orders

Applications

Boilers and heat exchangers
Petrochemical pressure vessels
Medium-temperature reactors
Industrial heating equipment