ASTM A736/A736M-03

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Designation: A 736/A 736M – 03
Standard Specification for
Pressure Vessel Plates, Low-Carbon Age-Hardening Nickel-
Copper-Chromium-Molybdenum-Columbium and Nickel-
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Copper-Manganese-Molybdenum-Columbium Alloy Steel
ThisstandardisissuedunderthefixeddesignationA736/A736M;thenumberimmediatelyfollowingthedesignationindicatestheyear
of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
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1. Scope* thickness and 90 ksi for plates over ⁄4 in. in thickness. The
2 maximum thickness of Grade C, Class 3, plates is 2 in. [50
1.1 This specification covers two grades of low-carbon
mm].
age-hardening alloy steel plates for welded pressure vessels
1.3 This specification is expressed in both inch-pound units
and piping components. The two grades are nickel-copper-
and in SI units. However, unless the order specifies the
chromium-molybdenum-columbium and nickel-copper-
applicable “M” specification designation (SI units), the mate-
manganese-molybdenum-columbium steels.
rial shall be furnished in inch-pound units.
1.2 Plates under this specification are available in three
1.4 The values stated in either inch-pound units or SI units
Classes, as follows:
are to be regarded separately as standard. Within the text, the
1.2.1 Class 1—As-rolled and precipitation heat treated.
SI units are shown in brackets. The values stated in each
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Available in thicknesses of ⁄4 in. [20 mm] and under. GradeA,
system are not exact equivalents. Therefore, each system must
Class 1 has a minimum specified tensile strength of 90 ksi.
beusedindependentlyoftheother.Combiningvaluesfromthe
Grade C, Class 1 has a minimum specified tensile strength of
two systems may result in nonconformance with this specifi-
100 ksi.
cation.
1.2.2 Class 2—Normalized and precipitation heat treated.
1.2.2.1 Available in Grade A only. Grade A has minimum
2. Referenced Documents
specifiedtensilestrengthof72ksiforthinnerplatesand65and
2.1 ASTM Standards:
60 ksi for thicker plates, with the minimum tensile strength
A20/A20M Specification for General Requirements for
dependentupontheplatethickness.Themaximumthicknessof
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Steel Plates for Pressure Vessels
GradeA,Class2islimitedonlybythecapacityofthechemical
A435/A435M Specification for Straight-Beam Ultrasonic
composition and heat treatment to meet the specified mechani-
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Examination of Steel Plates
cal property requirements; however, current practice usually
A 577/A577M Specification for Ultrasonic Angle-Beam
limits the maximum thickness to 8 in. [200 mm].
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Examination of Steel Plates
1.2.3 Class 3—Quenched and precipitation heat treated.
A578/A578M Specification for Straight-Beam Ultrasonic
1.2.3.1 Available as Grade A with a minimum specified
Examination of Plain and Clad Steel Plates for Special
tensile strength of 85 ksi for thinner plates and 75 and 70 ksi
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Applications
forthickerplates,withtheminimumtensilestrengthdependent
upon the plate thickness. The maximum thickness of GradeA,
3. General Requirements and Ordering Information
Class 3 plates is limited only by the capacity of the chemical
3.1 Plates supplied to this product specification shall con-
composition and heat treatment to meet the specified mechani-
form to the requirements of Specification A20/A20M, which
cal property requirements; however, current practice usually
outlines the testing and retesting methods and procedures,
limits the maximum thickness to 8 in. [200 mm].
permissible variations in dimensions and mass, quality and
1.2.3.2 Available as Grade C with a specified minimum
repair of defects, marking, loading, and so forth.
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tensilestrengthof95ksiforplates ⁄4in.[20mm]andunderin
3.2 Specification A20/A20M also establishes the rules for
ordering information that should be complied with when
purchasing plates to this specification.
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This specification is under the jurisdiction ofASTM CommitteeA01 on Steel,
3.3 In addition to the basic requirements of this specifica-
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee
tion, certain supplementary requirements are available where
A01.11 on Steel Plates for Boilers and Pressure Vessels.
additional control, testing, or examination is required to meet
Current edition approved Sept. 10, 2003. Published October 2003. Originally
approved in 1976. Last previous edition approved in 2000 as A736/A736M–88 end use requirements.
(2000).
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For ASME Boiler and Pressure Vessel Code applications, see related Specifi-
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cation SA-736 in Section II of that Code. Annual Book of ASTM Standards, Vol 01.04.
*ASummary of Changes section appears at the end of this standard.
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