

Under ASTM A302/A302M steel specification,there are four steel grades,such as A302 Grade A boiler steel plate,A302 Grade B pressure vessel steel plate,A302 Grade C boiler steel plate and A302 Grade D pressure vessel steel plate.Pressure vessel steel plate SA302 Grade A is manganese-molybdenum alloy steel plates intended particularly for welded boilers and other pressure vessels.Boiler steel plate A302 Grade A shall be with minimum yield strength at 310Mpa,and tensile strength within 515-655 Mpa.
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Other relative pressure vessel steel grades under steel standard ASTM and ASME are S/A387Gr11CL1 boiler steel plate,S/A387Gr11CL2 steel plate,S/A387Gr12CL1 alloy steel plate,S/A387Gr12CL2 pressure vessel steel plate,S/A387Gr22CL1 steel plate,S/A387Gr22CL2 boiler steel plate,S/A455 pressure vessel steel plate,S/A515 Grade 55 steel plate,S/A515 Grade 60 steel sheet,S/A515 Grade 65 boiler steel plate,S/A515 Grade 70 pressure vessel steel plate,S/A516 Grade 55 boiler steel plate,S/A516 Grade 60 steel plate,S/A516 Grade 65 alloy steel plate,S/A516 Grade 70 steel plate,S/A533 Grade A CL1 boiler steel plate,S/A533GrAcl2 pressure vessel steel plate,S/A533GrACL3 steel plate,S/A533GrB boiler steel plate,S/A537CL1 steel plate,S/A537CL2 boiler steel plate,S/A537CL3 steel plate.
Chemical composition of Product analysis for SA302 Grade A pressure vessel steel plate (Max %)
A302 Grade A |
Main chemical composition of A302 Grade A | ||||||
C |
Si |
Mn |
P |
S |
Mo |
Ni | |
T≤25 |
0.20 |
0.13-0.45 |
0.87-1.41 |
0.035 |
0.035 |
0.41-0.64 |
- |
25<T≤50 |
0.23 | ||||||
T>50 |
0.25 |