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 C chemical composition:
|
Grade |
Thickness |
C |
Mn |
Si |
P max |
S max |
Mo |
Ni |
|
A302 Grade C |
≤25mm |
0.20 |
1.07-1.62 |
0.13-0.45 |
0.025 |
0.025 |
0.41-0.64 |
0.37-0.73 |
|
25~50mm |
0.23 |
|
>50mm |
0.25 |
ASTM A302 Grade C mechanical properties:
|
Grade |
Tensile Strength (MPa) |
Yield Strength (MPa) |
% Elongation in 2 in.(50mm) min |
% Elongation in 8 in.(200mm) min |
Impacting Test Temperature(°C) |
|
A302 Grade C |
550-690 |
345 |
20 |
17 |
-20,40,-60 |
ASTM A302 Grade C is a manganese-molybdenum-nickel alloy steel plates intended particularly for welded boilers and other pressure vessels. And ASTM A302 Grade C and Grade D have same mechanical property and similar chemical composition but with different content of Nickel, ASTM A302 Grade C has 0.37-0.73% Nickel for product analysis and 0.4-0.7% Nickel for heat analysis.
A302 Gr. C plates with THK≤50 are normally supplied in the as-rolled condition and may be ordered normalized, normalized and tempered, or stress relieved. A302 Gr. C plates with THK>50mm shall be normalized or normalized and tempered. When normalizing plates ASTM A302 Grade C with THK≥100mm, the cooling rate may be accelerated by air blasting or liquid quenching followed by tempering in the temperature range from 1100 to 1300°F [595 to 705°C] to obtain mechanical properties comparable to those developed by normalizing plates in the lesser thicknesses.
