ASTM A20/A20M-04a

ASTM A20/A20M-04a - 1.5.2004

1. Scope

1.1 This general requirements specification covers a group of common requirements that, unless otherwise specified in the applicable product specification, apply to rolled steel plates for pressure vessels covered by each of the following product specifications issued by ASTM:

1.1.1 This general requirements specification also covers a group of supplementary requirements that are applicable to several of the above product specifications as indicated therein. Such requirements are provided for use if additional testing or additional restrictions are required by the purchaser, and apply only if specified individually in the purchase order.

1.2 provides information on coil as a source of plates for pressure vessels.

1.3 provides information on the variability of tensile properties in plates for pressure vessels.

1.4 provides information on the variability of Charpy-V-Notch impact test properties in plates for pressure vessels.

1.5 provides information on cold bending of plates, including suggested minimum inside radii for cold bending.

1.6 These materials are intended to be suitable for fusion welding. When the steel is to be welded, it is presupposed that a welding procedure suitable for the grade of steel and intended use or service will be utilized.

1.7 In case of any conflict in requirements, the requirements of the applicable product specification prevail over those of this general requirements specification.

1.8 Additional requirements that are specified in the purchase order and accepted by the supplier are permitted, provided that such requirements do not negate any of the requirements of this general requirements specification or the applicable product specification.

1.9 For purposes of determining conformance with this general requirements specification and the applicable product specification, values are to be rounded to the nearest unit in the right-hand place of figures used in expressing the limiting values in accordance with the rounding method of Practice E 29.

1.10 The values stated in either inch-pound units or SI units are to be regarded as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents. Therefore, each system is to be used independently of the other.

1.11 This general requirements specification and the applicable product specification are expressed in both inch-pound units and SI units; unless the order specifies the applicable "M" specification designation (SI units), the plates are to be furnished to inch-pound units.

2. Referenced Documents

A387/A387M-25	Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum
A941-26a	Standard Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys (Includes all amendments and changes 4/15/2026).
A832/A832M-25	Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum-Vanadium
A770/A770M-03(2025)	Standard Specification for Through-Thickness Tension Testing of Steel Plates for Special Applications
A751-25	Standard Test Methods and Practices for Chemical Analysis of Steel Products
A738/A738M-19(2026)	Standard Specification for Pressure Vessel Plates, Heat-Treated, Carbon-Manganese-Silicon Steel, for Moderate and Lower Temperature Service
A737/A737M-17(2024)e1	Standard Specification for Pressure Vessel Plates, High-Strength, Low-Alloy Steel (Includes all amendments and changes 9/23/2024).
A736/A736M-25	Standard Specification for Pressure Vessel Plates, Low-Carbon Age-Hardening Nickel-Copper-Chromium-Molybdenum-Columbium (Niobium) Alloy Steel
A735-A735M-12	Standard Specification for Pressure Vessel Plates, Low-Carbon Manganese-Molybdenum-Columbium Alloy Steel, for Moderate and Lower Temperature Service (Withdrawn 2017)
A285/A285M-24	Standard Specification for Pressure Vessel Plates, Carbon Steel, Low- and Intermediate-Tensile Strength
A299/A299M-17(2022)	Standard Specification for Pressure Vessel Plates, Carbon Steel, Manganese-Silicon
A302/A302M-17(2022)	Standard Specification for Pressure Vessel Plates, Alloy Steel, Manganese-Molybdenum and Manganese-Molybdenum-Nickel
A203/A203M-23	Standard Specification for Pressure Vessel Plates, Alloy Steel, Nickel
A204/A204M-17(2022)	Standard Specification for Pressure Vessel Plates, Alloy Steel, Molybdenum
A225/A225M-17(2022)	Standard Specification for Pressure Vessel Plates, Alloy Steel, Manganese-Vanadium-Nickel
A263-12(2026)	Standard Specification for Stainless Chromium Steel-Clad Plate
A264-12(2026)	Standard Specification for Stainless Chromium-Nickel Steel-Clad Plate
A265-12(2026)	Standard Specification for Nickel and Nickel-Base Alloy-Clad Steel Plate
A537/A537M-20	Standard Specification for Pressure Vessel Plates, Heat-Treated, Carbon-Manganese-Silicon Steel
A542/A542M-25	Standard Specification for Pressure Vessel Plates, Alloy Steel, Quenched-and-Tempered, Chromium-Molybdenum, and Chromium-Molybdenum-Vanadium
A543/A543M-09(2021)	Standard Specification for Pressure Vessel Plates, Alloy Steel, Quenched and Tempered Nickel-Chromium-Molybdenum
A553/A553M-22	Standard Specification for Pressure Vessel Plates, Alloy Steel, Quenched and Tempered 7 %, 8 %, and 9 % Nickel
A562/A562M-10(2021)	Standard Specification for Pressure Vessel Plates, Carbon Steel, Manganese-Titanium for Glass or Diffused Metallic Coatings
A577/A577M-17(2023)	Standard Specification for Ultrasonic Angle-Beam Examination of Steel Plates
A517/A517M-17(2023)	Standard Specification for Pressure Vessel Plates, Alloy Steel, High-Strength, Quenched and Tempered
A533/A533M-24	Standard Specification for Pressure Vessel Plates, Alloy Steel, Quenched and Tempered, Manganese-Molybdenum and Manganese-Molybdenum-Nickel
A578/A578M-17(2023)	Standard Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications
A612/A612M-20	Standard Specification for Pressure Vessel Plates, Carbon Steel, High Strength, for Moderate and Lower Temperature Service
A370-26	Standard Test Methods and Definitions for Mechanical Testing of Steel Products
A1017/A1017M-17(2024)	Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum-Tungsten
A435/A435M-17(2023)	Standard Specification for Straight-Beam Ultrasonic Examination of Steel Plates
A455/A455M-12a(2023)	Standard Specification for Pressure Vessel Plates, Carbon Steel, High-Strength Manganese (Includes all amendments and changes 11/20/2023).
A515/A515M-17(2022)	Standard Specification for Pressure Vessel Plates, Carbon Steel, for Intermediate- and Higher-Temperature Service
A516/A516M-25	Standard Specification for Pressure Vessel Plates, Carbon Steel, for Moderate- and Lower-Temperature Service
A353/A353M-17(2022)	Standard Specification for Pressure Vessel Plates, Alloy Steel, Double-Normalized and Tempered 9 % Nickel
A645/A645M-10(2022)	Standard Specification for Pressure Vessel Plates, 5 % and 51 2 % Nickel Alloy Steels, Specially Heat Treated
A662/A662M-17(2024)	Standard Specification for Pressure Vessel Plates, Carbon-Manganese-Silicon Steel, for Moderate and Lower Temperature Service
A700-14(2019)	Standard Guide for Packaging, Marking, and Loading Methods for Steel Products for Shipment
A724/A724M-09(2023)	Standard Specification for Pressure Vessel Plates, Carbon-Manganese-Silicon Steel, Quenched and Tempered, for Welded Pressure Vessels
E21-20	Standard Test Methods for Elevated Temperature Tension Tests of Metallic Materials
A841/A841M-17(2025)	Standard Specification for Steel Plates for Pressure Vessels, Produced by Thermo-Mechanical Control Process (TMCP)
A844/A844M-21	Standard Specification for Steel Plates, 9 % Nickel Alloy, for Pressure Vessels, Produced by the Direct-Quenching Process
E29-22	Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E112-25	Standard Test Methods for Determining Average Grain Size
E208-20e1	Standard Test Method for Conducting Drop-Weight Test to Determine Nil-Ductility Transition Temperature of Ferritic Steels (Includes all amendments and changes 2/9/2023).
E709-21	Standard Guide for Magnetic Particle Testing
	BoilerandPressureVesselCode, Section IX
Fed.Std.No.123	Marking for Shipment (Civil Agencies)
B1	Bar Code Symbology Standard
A734-A734M-12	Standard Specification for Pressure Vessel Plates, Alloy Steel and High-Strength Low-Alloy Steel, Quenched-and-Tempered (Withdrawn 2017)