ASTM A302 Pressure Vessel Steel Standard

ASTM A302 standard is a specification for pressure vessel plate, manganese-molybdenum and manganese-molybdenum-nickel alloy steel. There are four grades under ASTM A302 pressure vessel steel standard: Grades A, B, C, and D. ASTM A302 Grade C and ASTM A302 D contains chemical composition Ni, with the same thickness, yield and tensile strength of ASTM A302 Grade C is the same of A302 Grade B, while elongation rate of A302 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. The maximum thickness of plates is limited only by the capacity of the chemical composition to meet the specified mechanical property requirements. The ASTM A302 steel shall be killed and shall conform to fine grain size requirements. The plates shall be subjected to tension test to determine the tensile strength, yield strength, and elongation. ASTM A302/A302M standard main steel grade: ASTM A302/A302M ASTM A302 Grade A,B,C,D(A302 GRA,B,C,D)

ASTM A302 Pressure Vessel Plates Size

Thickness: 3-150mm
Width: 1220-4200mm
Length: 5000-18000mm
MOQ: 5 PC
Product type : Steel plate, coil
Delivery time : Promptly ( Stock) or 10-40 days (Production) 
Stock : 300tons 
MTC: Available 
Payment Term: T/T or L/C At sight.
Application: boilers and pressure vessels

Heat Treatment

ASTM A302 pressure vessel plates 2 inch [50mm] and under in thickness are normally supplied in the as-rolled condition. The plates may be ordered normalized, normalized and tempered, or stress relieved. ASTM A302 plates over 2 inch [50mm] in thickness shall be normalized or normalized and tempered. 
When normalizing plates 4 inch [100mm] or over in thickness, the cooling rate may be accelerated by air blasting or liquid quenching followed by tempering in the temperature range from 1100 to 1300℉ [595 to 705℃] to obtain mechanical properties comparable to those developed by normalizing plates in the lesser thickness. 
 

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