ASTM A302 GR.B Mn-Mo Alloy Pressure Vessel Steel Plate

Classification :

ASTM A302 standard specification for pressure vessel plates in alloy steel, manganese molybdenum and manganese-molybdenum-nickel.

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Boiler Pressure Vessel Steel

ASTM A302 GR.B Mn-Mo Alloy Pressure Vessel Steel Plate Descriptions:

ASTM A302 standard specification for pressure vessel plates in alloy steel, manganese molybdenum and manganese-molybdenum-nickel.
ASTM A302 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 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

Chemical Composition and Mechanical Properties:

A302 Grade B Chemical Composition
Carbon, max	%	Manganese, max	%	Silicon, max	%	Sulfur max	%
25mm or under	0.2	Heat Analysis	1.15-1.50	Heat Analysis	0.15-0.40	All thick	0.035
25-50mm	0.23	Product Analysis	1.07-1.62	Product Analysis	0.13-0.45
over 50mm	0.25
		Molybdenum max	%	Nickel max	%	Phosphorus	%
		Heat Analysis	0.45-0.60	Heat Analysis	…	All thick	0.035
		Product Analysis	0.41-0.64	Product Analysis	…	All thick	0.035

Mechanical Property of A302 Grade B steel plate	A302 Grade B
Tensile strength, kis [MPa]	80-100 [550-690]
Yield strength, min, kis [MPa]	50 [345]
Elongation in 8 in. [200 mm], min, %	15
Elongation in 2 in. [50 mm], min, %	18

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Boiler Pressure Vessel Steel