Astm a20

Designation: A 20/A20M – 04a

Standard Specification for

General Requirements for Steel Plates for Pressure Vessels1
This standard is issued under the fixed designation A 20/A20M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense.

1. Scope* 1.1 This general requirements specification2 covers a group of common requirements that, unless otherwise specified in the applicable product specification, apply to rolled steel plates for pressure vessels covered byeach of the following product specifications issued by ASTM:
Title of Specification Pressure Vessel Plates, Alloy Steel, Chromium-Manganese Silicon Pressure Vessel Plates, Alloy Steel, Nickel Pressure Vessel Plates, Alloy Steel, Molybdenum Pressure Vessel Plates, Alloy Steel, Manganese-Vanadium Pressure Vessel Plates, Carbon Steel, Low- and IntermediateTensile Strength Pressure Vessel Plates, CarbonSteel, Manganese-Silicon Pressure Vessel Plates, Alloy Steel, Manganese-Molybdenum and Manganese-Molybdenum-Nickel Pressure Vessel Plates, Alloy Steel, 9 Percent Nickel DoubleNormalized and Tempered Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum Pressure Vessel Plates, Carbon Steel, High Strength Manganese Pressure Vessel Plates, Carbon Steel, for Intermediate- and Higher-TemperatureService Pressure Vessel Plates, Carbon Steel, Moderate- and LowerTemperature Service Pressure Vessel Plates, Alloy Steel, High-Strength, Quenched and Tempered Pressure Vessel Plates, Alloy Steel, Quenched and Tempered Manganese-Molybdenum and Manganese-MolybdenumNickel Pressure Vessel Plates, Heat-Treated, Carbon-ManganeseSilicon Steel Pressure Vessel Plates, Alloy Steel, Quenched and TemperedChromium-Molybdenum Pressure Vessel Plates, Alloy Steel, Quenched and Tempered Nickel-Chromium-Molybdenum Pressure Vessel Plates, Alloy Steel, Quenched and Tempered 8 and 9 Percent Nickel Pressure Vessel Plates, Carbon Steel, Manganese-Titanium for Glass or Diffused Metallic Coatings Pressure Vessel Plates, Carbon Steel, High Strength, for Moderate and Lower Temperature Service ASTM Designation3 A 202/A202M A 203/A 203M A 204/A 204M A 225/A 225M A 285/A 285M A 299/A 299M A 302/A 302M A 353/A 353M A 387/A 387M A 455/A 455M A 515/A 515M A 516/A 516M A 517/A 517M A 533/A 533M

Pressure Vessel Plates, Five Percent Nickel Alloy Steel, Specially Heat Treated Pressure Vessel Plates, Carbon-Manganese, for Moderate and Lower Temperature Service Pressure Vessel Plates, Carbon Steel, Quenched andTempered, for Welded Layered Pressure Vessels Pressure Vessel Plates, Alloy Steel and High-Strength LowAlloy Steel, Quenched and Tempered Pressure Vessel Plates, Low-Carbon ManganeseMolybdenum-Columbium Alloy Steel, for Moderate and Lower Temperature Service Pressure Vessel Plates, Low-Carbon Age-Hardening NickelCopper-Chromium-Molybdenum-Columbium Alloy Steel Pressure Vessel Plates, High-StrengthLow-Alloy Steel Pressure Vessel Plates, Heat-Treated, Carbon-ManganeseSilicon Steel, for Moderate and Lower Temperature Service Pressure-Vessel Plates, Quenched and Tempered, Manganese-Chromium-Molybdenum-Silicon-Zirconium Alloy Steel Pressure Vessel Plates, Alloy Steel, Chromium-MolybdenumVanadium Pressure Vessel Plates, Produced by the Thermo-Mechanical Control Process (TMCP) Pressure Vessel Plates,9 % Nickel Alloy, Produced by the Direct-Quenching Process

A 645/A 645M A 662/A 662M A 724/A 724M A 734/A 734M A 735/A 735M

A 736/A 736M A 737/A 737M A 738/A 738M A 782/A 782M

A 832/A 832M A 841/A 841M A 844/A 844M

A 537/A 537M A 542/A 542M A 543/A 543M A 553/A 553M A 562/A 562M A 612/A 612M

1 This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless...