A302 Gr.B material under steel standard ASTM A302 is a manganese-molybdenum Alloy steel plate intended particularly for welded boilers and other pressure vessels. According to their strength levels,there are different grades A302 Grade A,A302 Grade B,A302 Grade C and A302 Grade D.P ressure vessel plate A302 Gr.B steel owns tensile strength within 550-690Mpa,minimum yield strength is 345 Mpa, and pressure vessel steel plate A302 Gr.A owned tensile strength at 515-655 Mpa.
ASTM A302 steel is a kind of low alloy steel specification covers 4 different grades(A, B, C, D), Grade C and D contains chemical composition Ni, with the same thickness, yield and tensile strength of Grade C is the same of Grade B, while elongation rate of grade C is higher. A302 Gr.B material is manufactured for Pressure Vessel, Boiler, Storage Tanks and Heat Exchanger in Oil, Gas Project.
Thickness: 6MM to 300MM,
Width: 1500mm to 4050mm,
Length: 3000mm to 15000mm
ASTM A302 Grade B Chemical Composition
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ASTM A302 Grade B Chemical Composition |
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Grade |
The Element Max (%) |
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|
C |
Si |
Mn |
P |
S |
Al |
N |
|
|
A302 Grade B |
0.20-0.25 |
0.13–0.45 |
1.07-1.62 |
0,035 |
0,035 |
|
|
|
Nb |
V |
Ti |
Cu |
Cr |
Ni |
Mo |
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|
|
|
|
|
|
|
0.41–0.64 |
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Carbon Equivalent: Ceq = 【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%
ASTM A302 Grade B Mechanical Property
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Grade |
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ASTM A302 Grade BMechanical Property |
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Thickness |
Yield |
Tensile |
Elongation |
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|
A302 Grade B |
mm |
Min Mpa |
Mpa |
Min % |
|
6-50 |
345 |
550-690 |
18% |
|
|
50-200 |
345 |
550-690 |
15% |
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