Katalor is a professional supplier for pressure vessels steels. One of the professional plates are under ASTM A302M--Standard Specification for Pressure Vessel Plates, Alloy Steel, Manganese-Molybdenum and Manganese-Molybdenum-Nicke.
ASTM A302 Grade B chemical composition:
|
Grade |
Thickness |
C |
Mn |
Si |
P max |
S max |
Mo |
|
A302 Grade B |
≤25mm |
0.20 |
0.87-1.41 |
0.13-0.45 |
0.025 |
0.025 |
0.41-0.64 |
|
25~50mm |
0.23 |
|
>50mm |
0.25 |
ASTM A302 Grade B mechanical properties:
|
Grade |
Tensile Strength (MPa/KSI) |
Yield Strength (MPa/KSI) min |
% Elongation in 2 in.(50mm) min |
% Elongation in 8 in.(200mm) min |
Impacting Test Temperature(°C) |
|
A302 Grade B |
550-690
(80-100) |
345
(50) |
19 |
15 |
-20,40,-60 |
ASTM A302 Grade B is a another manganese-molybdenum alloy steel plates intended particularly for welded boilers and other pressure vessels. The maximum thickness of ASTM A302 Grade B plates is limited only by the capacity of the chemical composition to meet the specified mechanical property requirements. And the carbon content is different according to the thickness of plates, C≤0.20% for THK≤25mm, C≤0.23% for THK 25~50mm, C≤0.25% for THK >50mm.
The steel ASTM A302 Grade B shall be killed and shall conform to the fine grain size requirement of Specification A20/A20M. For plates A302 Gr. B produced from coil and furnished without heat treatment or with stress relieving only, three test results are reported for each qualifying coil.
