ASTM A302 Grade A Mn-Mo Alloy Pressure Vessel Steel Plate

This specification covers manganese-molybdenum and manganese-molybdenum-nickel alloy steel plates intended particularly for welded boilers and other pressure vessels. 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.This specification covers manganese-molybdenum and manganese-molybdenum-nickel alloy steel plates intended particularly for welded boilers and other pressure vessels. 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. It 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
 

A302 Grade A Chemical Composition
Carbon, max	%	Manganese, max	%	Silicon, max	%	Sulfur max	%
25mm or under	0.2	Heat Analysis	0.95-1.30	Heat Analysis	0.15-0.40	All thick	0.035
25-50mm	0.23	Product Analysis	0.87-1.41	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	…

 

Mechanical Property of A302 Grade A steel plate	A302 Grade A
Tensile strength, kis [MPa]	75-95 [515-655]
Yield strength, min, kis [MPa]	45 [310]
Elongation in 8 in. [200 mm], min, %	15
Elongation in 2 in. [50 mm], min, %	19