A302 Grade B steel plates standard specification for pressure vessel plates in alloy steel, manganese molybdenum and manganese-molybdenum-nickel.
A302 Grade B steel plate shall be normally supplied in the as-rolled condition. Plates may be ordered normalized or stress relieved, or both. If A 302 Grade B above 50mm in thickness shall be normalized.
Supplementary Technology: HIC Test | NACE MR0175 | Z15 | Z25 | Z35 |
Thickness: 6MM to 300MM,
Width: 1500mm to 4050mm,
Length: 3000mm to 15000mm
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A302 Grade B Chemical Composition |
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Carbon, max |
% |
Manganese, max |
% |
Silicon, max |
% |
Sulfur max |
% |
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25mm or under |
0.2 |
Heat Analysis |
1.15-1.50 |
Heat Analysis |
0.15-0.40 |
All thick |
0.035 |
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25-50mm |
0.23 |
Product Analysis |
1.07-1.62 |
Product Analysis |
0.13-0.45 |
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over 50mm |
0.25 |
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Molybdenum max |
% |
Nickel max |
% |
Phosphorus |
% |
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Heat Analysis |
0.45-0.60 |
Heat Analysis |
… |
All thick |
0.035 |
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Product Analysis |
0.41-0.64 |
Product Analysis |
… |
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Carbon Equivalent: Ceq = 【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%
A302 Grade B Mechanical Property
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Mechanical Property of A302 Grade B steel plate |
A302 Grade B |
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Tensile strength, kis [MPa] |
80-100 [550-690] |
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Yield strength, min, kis [MPa] |
50 [345] |
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Elongation in 8 in. [200 mm], min, % |
15 |
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Elongation in 2 in. [50 mm], min, % |
18 |
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Equivalent steel grade of A302 Grade B |
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Europe |
Belgium |
Germany |
France |
Italy |
UK |
India |
Japan |
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Gr.27,31 |
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