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 A chemical composition:
|
Grade |
Thickness |
C |
Mn |
Si |
P max |
S max |
Mo |
|
A302 Grade A |
≤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 A 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 A |
515-655
(75~95) |
310
(45) |
19 |
15 |
-20,40,-60 |
ASTM A302 Grade A is a manganese-molybdenum alloy steel plates intended particularly for welded boilers and other pressure vessels. And ASTM A302 Grade A and Grade B have same chemical composition but with different mechanical property, the tensile strength for ASTM A302 Grade A is 515~655MPa while for Grade B is 550~690MPa; the yield strength for ASTM A302 Grade A is Min 310MPa while for Grade B is Min 345MPa.
The Plates in ASTM A302 Gr. A with thickness ≤50mm are normally supplied in the as-rolled condition and may be ordered normalized, normalized and tempered, or stress relieved conditions. And while the thickness of plates over 50mm, ASTM A302 Grade A shall be normalized or normalized and tempered condition.
