norma ASTM 225A

Designation: A225/A225M – 03 (Reapproved 2007)

Standard Specification for

Pressure Vessel Plates, Alloy Steel, Manganese-VanadiumNickel1
This standard is issued under the fixed designation A225/A225M; 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 oflast reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.

1. Scope* 1.1 This specification2 covers manganese-vanadium-nickel alloy steel plates intended primarily for welded layered pressure vessels. 1.2 Plates under this specification are available in two grades having different strength levels as follows:
Grade C D 3 in. [75 mm] and underOver 3 in. [75 mm] Tensile Strength, ksi [MPa] 105–135 [725–930] 80–105 [550–725] 75–100 [515–690]

1.3 The maximum thickness of plates is limited only by the capacity of the chemical composition to meet the specified mechanical property requirements; however, current mill practice normally limits Grade C to 0.58 in. [15 mm] maximum and Grade D to 6 in. [150 mm] maximum. 1.4 The values stated ineither inch-pound units or SI units are to be regarded separately 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 must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.

2. Referenced Documents 2.1 ASTM Standards:3 A20/A20MSpecification for General Requirements for Steel Plates for Pressure Vessels A435/A435M Specification for Straight-Beam Ultrasonic Examination of Steel Plates A577/A577M Specification for Ultrasonic Angle-Beam Examination of Steel Plates A578/A578M Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications 3. General Requirements and Ordering Information 3.1Plates supplied to this product specification shall conform to Specification A20/A20M, which outlines the testing and retesting methods and procedures, permissible variations in dimensions and mass, quality and repair of defects, marking, loading, etc. 3.2 Specification A20/A20M also establishes the rules for ordering information that should be complied with when purchasing plates to thisspecification. 3.3 In addition to the basic requirements of this specification, certain supplementary requirements are available where additional control, testing, or examination is required to meet end use requirements.

1 This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.11 on Steel Plates forBoilers and Pressure Vessels. Current edition approved Nov. 1, 2007. Published March 2008. Originally approved in 1939. Last previous edition approved in 2003 as A225/A225M – 03. DOI: 10.1520/A0225_A0225M-03R07. 2 For ASME Boiler and Pressure Vessel Code applications, see related Specification SA-225/SA-225M in Section II of that Code.

3 For referenced ASTM standards, visit the ASTM website,www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website.

*A Summary of Changes section appears at the end of this standard.
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A225/A225M – 03 (2007)
TABLE 1 Chemical Requirements
Composition, % Elements Grade C Carbon, max Manganese, max: Heat analysis Product analysis Phosphorus, maxA Sulfur, maxA Silicon: Heat analysis Product...