ASTM A533 Grade B (often designated as ASME SA-533 Grade B) is a low-alloy manganese-molybdenum-nickel steel plate primarily used for the construction of welded pressure vessels. It is most notably used as the standard material for nuclear reactor pressure vessels (RPVs) due to its high strength and excellent notch toughness, even under extreme conditions.
a533 Type B class2 pressure vessel steel chemical composition %
Grade |
C |
Si |
Mn |
P |
S |
Ni |
Mo |
|
A533CrBCL2 |
≤0.25 |
0.15-0.40 |
1.15-1.50 |
≤0.025 |
≤0.025 |
0.40-0.70 |
0.45-0.60 |
A533 GrB CL2 steel production process
The smelting method is: the steel should be killed steel and meet the requirements of A 20/A, 20M standard fine austenite grain size.
A533 GrB CL2 steel plate is one of the main materials used in the nuclear power industry. It is often used in the tube section of nuclear reactor vessels, where high-level radiation may affect the performance of steel. The steel plate is widely used to prevent hydrogen embrittlement, hydrogen corrosion, hydrogen peeling, and sulfide corrosion. It also has good low temper embrittlement performance in petroleum, chemical, power station, boiler and other industries. It is used to make reactors, heat exchangers, and separators. , Spherical tanks, oil and gas tanks, liquefied gas tanks, nuclear reactor pressure shells, boiler drums, liquefied petroleum gas cylinders, high-pressure water pipes of hydropower stations, turbine volutes and other equipment and components.
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