ASTM A225/A225M-93(1999)
(Specification)Standard Specification for Pressure Vessel Plates, Alloy Steel, Manganese-Vanadium-Nickel
Standard Specification for Pressure Vessel Plates, Alloy Steel, Manganese-Vanadium-Nickel
SCOPE
1.1 This specification covers manganese-vanadium-nickel alloy steel plates intended primarily for welded layered pressure vessels.
1.2 Material under this specification is available in two grades having different strength levels as follows: Tensile Strength, Grade ksi [Mpa] C 105-135 [725-930] D 3 in.[75 mm] and under 80-105 [550-725] Over 3 in.[75 mm] 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 in either 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.
General Information
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Standards Content (Sample)
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Designation: A 225/A 225M – 93 (Reapproved 1999)
Standard Specification for
Pressure Vessel Plates, Alloy Steel, Manganese-Vanadium-
Nickel
This standard is issued under the fixed designation A 225/A 225M; 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.
A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope Examination of Steel Plates
A 578/A 578M Specification for Straight-Beam Ultrasonic
1.1 This specification covers manganese-vanadium-nickel
Examination of Plain and Clad Steel Plates for Special
alloy steel plates intended primarily for welded layered pres-
Applications
sure vessels.
1.2 Material under this specification is available in two
3. General Requirements and Ordering Information
grades having different strength levels as follows:
3.1 Material supplied to this material specification shall
Tensile Strength,
conform to Specification A 20/A 20M. These requirements
Grade ksi [MPa]
outline the testing and retesting methods and procedures,
C 105–135 [725–930]
permissible variations in dimensions and mass, quality and
D
repair of defects, marking, loading, etc.
3 in. [75 mm] and under 80–105 [550–725]
Over 3 in. [75 mm] 75–100 [515–690]
3.2 Specification A 20/A 20M also establishes the rules for
the basis of purchase that should be complied with when
1.3 The maximum thickness of plates is limited only by the
purchasing material to this specification.
capacity of the chemical composition to meet the specified
3.3 In addition to the basic requirements of this specifica-
mechanical property requirements; however, current mill prac-
tion, certain supplementary requirements are available when
tice normally limits Grade C to 0.58 in. [15 mm] maximum and
additional control, testing, or examination is required to meet
Grade D to 6 in. [150 mm] maximum.
end use requirements. These include:
1.4 The values stated in either inch-pound units or SI units
3.3.1 Vacuum treatment,
are to be regarded separately as standard. Within the text, the
3.3.2 Additional or special tension testing,
SI units are shown in brackets. The values stated in each
3.3.3 Impact testing, and
system are not exact equivalents; therefore, each system must
3.3.4 Nondestructive examination.
be used independently of the other. Combining values from the
3.4 The purchaser is referred to the listed supplementary
two systems may result in nonconformance with the specifi-
requirements in this specification and to the detailed require-
cation.
ments in Specification A 20/A 20M.
2. Referenced Documents
3.5 If the requirements of this specification are in conflict
with the requirements of Specification A 20/A 20M, the re-
2.1 ASTM Standards:
quirements of this specification shall prevail.
A 20/A 20M Specification for General Requirements for
Steel Plates for Pressure Vessels
4. Manufacture
A 435/A 435M Specification for Straight-Beam Ultrasonic
4.1 Steelmaking Practice—The steel shall be killed and
Examination of Steel Plates
shall conform to the fine austenitic grain size requirement of
A 577/A 577M Specification for Ultrasonic Angle-Beam
Specification A 20/A 20M.
5. Heat Treatment
This specification is under the jurisdiction of ASTM Committee A-1 on Steel,
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee 5.1 Grade D plates of all thicknesses and Grade C plates of
A01.11 on Steel Plates for Boilers and Pressure Vessels.
thicknesses over 2 in. [50 mm] shall be normalized.
Current edition approved June 15, 1993. Published August 1993. Originally
5.2 Grade C plates 2 in. [50 mm] and under in thickness are
published as A 225 – 39 T. Last previous edition A 225/A 225M – 90.
usually supplied in the as-rolled condition. The plates may be
For ASME Boiler and Pressure Vessel Code applications, see related Specifi-
cation SA-225/SA-225M in Section II of that Code.
ordered normalized or stress-relieved, or both.
Annual Book of ASTM Standards, Vol 01.04.
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NOTICE: This standard has either been sup
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