ASTM A736/A736M-12
(Specification)Standard Specification for Pressure Vessel Plates, Low-Carbon Age-Hardening Nickel-Copper-Chromium-Molybdenum-Columbium Alloy Steel
Standard Specification for Pressure Vessel Plates, Low-Carbon Age-Hardening Nickel-Copper-Chromium-Molybdenum-Columbium Alloy Steel
ABSTRACT
This specification covers two grades of low-carbon age-hardening alloy steel plates for welded pressure vessels and piping components. The two grades are nickel-copper-chromium-molybdenum-columbium and nickel-copper-manganese-molybdenum-columbium alloy steel. The heat treatment procedure for class 1, 2, 3 plates are presented. The steel shall conform to the required chemical compositions. Mechanical property requirements of the steel plates that include tension test requirements and notch-toughness requirements are presented in details.
SCOPE
1.1 This specification2 covers low-carbon age-hardening alloy steel plates for welded pressure vessels and piping components. The specification covers nickel-copper-chromium-molybdenum-columbium steel.
1.2 Plates under this specification are available as follows:
1.2.1 Available in Grade A, Class 3 only.
1.2.1.1 Quenched and precipitation heat treated with a minimum specified tensile strength of 85 ksi for thinner plates and 75 and 70 ksi for thicker plates, with the minimum tensile strength dependent upon the plate thickness. The maximum thickness of Grade A, Class 3 plates is limited only by the capacity of the chemical composition and heat treatment to meet the specified mechanical property requirements; however, current practice usually limits the maximum thickness to 8 in. [200 mm].
1.3 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable “M” specification designation (SI units), the material shall be furnished in inch-pound units.
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 this specification.
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Designation: A736/A736M −12
Standard Specification for
Pressure Vessel Plates, Low-Carbon Age-Hardening Nickel-
1
Copper-Chromium-Molybdenum-Columbium Alloy Steel
This standard is issued under the fixed designationA736/A736M; the number immediately following the designation indicates the year
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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope* A20/A20M SpecificationforGeneralRequirementsforSteel
2 Plates for Pressure Vessels
1.1 This specification covers low-carbon age-hardening
A435/A435M Specification for Straight-Beam Ultrasonic
alloy steel plates for welded pressure vessels and piping
Examination of Steel Plates
components. The specification covers nickel-copper-
A577/A577M Specification for Ultrasonic Angle-Beam Ex-
chromium-molybdenum-columbium steel.
amination of Steel Plates
1.2 Plates under this specification are available as follows:
A578/A578M Specification for Straight-Beam Ultrasonic
1.2.1 Available in Grade A, Class 3 only.
Examination of Rolled Steel Plates for Special Applica-
1.2.1.1 Quenched and precipitation heat treated with a
tions
minimum specified tensile strength of 85 ksi for thinner plates
and 75 and 70 ksi for thicker plates, with the minimum tensile
3. General Requirements and Ordering Information
strength dependent upon the plate thickness. The maximum
3.1 Material supplied to this material specification shall
thickness of Grade A, Class 3 plates is limited only by the
conform to Specification A20/A20M. These requirements out-
capacity of the chemical composition and heat treatment to
line the testing and retesting methods and procedures, permit-
meetthespecifiedmechanicalpropertyrequirements;however,
ted variations in dimensions, and mass, quality, and repair of
current practice usually limits the maximum thickness to 8 in.
defects, marking, loading, and ordering information.
[200 mm].
3.2 In addition to the basic requirements of this
1.3 This specification is expressed in both inch-pound units
specification,certainsupplementaryrequirementsareavailable
and in SI units. However, unless the order specifies the
when additional control, testing, or examination is required to
applicable “M” specification designation (SI units), the mate-
meet end use requirements. The purchaser is referred to the
rial shall be furnished in inch-pound units.
listed supplementary requirements in this specification and to
1.4 The values stated in either inch-pound units or SI units
the detailed requirements in Specification A20/A20M.
are to be regarded separately as standard. Within the text, the
3.3 If the requirements of this specification are in conflict
SI units are shown in brackets. The values stated in each
withtherequirementsofSpecificationA20/A20M,therequire-
system are not exact equivalents. Therefore, each system must
ments of this specification shall prevail.
beusedindependentlyoftheother.Combiningvaluesfromthe
two systems may result in nonconformance with this specifi-
4. Materials and Manufacture
cation.
4.1 The steel shall be killed and shall conform to the fine
2. Referenced Documents
austenitic grain size requirement of Specification A20/A20M.
3
2.1 ASTM Standards:
5. Heat Treatment
5.1 The plates shall be quenched in a liquid medium from a
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
temperature in the range from 1600 to 1700°F [870 to 930°C]
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee
andthenprecipitationheattreatedatatemperatureintherange
A01.11 on Steel Plates for Boilers and Pressure Vessels.
from 1000 to 1300°F [540 to 705°C] for a time to be
Current edition approved Nov. 1, 2012. Published January 2013. Originally
approved in 1976. Last previous edition approved in 2007 as A736/A736M – 03
determined by the manufacturer or processor.
(2007). DOI: 10.1520/A0736_A0736M-12.
2
5.2 If the purchaser elects to perform the thermal treatment,
For ASME Boiler and Pressure Vessel Code applications, see related Specifi-
cation SA-736 in Section II of that Code.
theplatesshallbeacceptedonthebasisofmilltestsmadefrom
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
test coupons heat treated as specified in the purchase order. If
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
thetestcouponheattreatmentrequirementsarenotspecifiedin
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. the purchase order, the manufacturer or processor shall heat
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. Unit
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A736/A736M − 03 (Reapproved 2007) A736/A736M − 12
Standard Specification for
Pressure Vessel Plates, Low-Carbon Age-Hardening Nickel-
Copper-Chromium-Molybdenum-Columbium and Nickel-
1
Copper-Manganese-Molybdenum-Columbium Alloy Steel
This standard is issued under the fixed designation A736/A736M; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope Scope*
2
1.1 This specification covers two grades of low-carbon age-hardening alloy steel plates for welded pressure vessels and piping
components. The two grades are nickel-copper-chromium-molybdenum-columbium and nickel-copper-manganese-molybdenum-
columbium steels. specification covers nickel-copper-chromium-molybdenum-columbium steel.
1.2 Plates under this specification are available in three classes, as follows:
3
1.2.1 Class 1—As-rolled and precipitation heat treated. Available in thicknesses of ⁄4 in. [20 mm] and under. Grade A, Class
1 has a minimum specified tensile strength of 90 ksi. Grade C, Class 1 has a minimum specified tensile strength of 100 ksi.
1.2.2 Class 2—Normalized and precipitation heat treated.
1.2.2.1 Available in Grade A only. Grade A has minimum specified tensile strength of 72 ksi for thinner plates and 65 and 60
ksi for thicker plates, with the minimum tensile strength dependent upon the plate thickness. The maximum thickness of Grade
A, Class 2 is limited only by the capacity of the chemical composition and heat treatment to meet the specified mechanical property
requirements; however, current practice usually limits the maximum thickness to 8 in. [200 mm].
1.2.1 Class 3—Quenched and precipitation heat treated. Available in Grade A, Class 3 only.
1.2.1.1 Available as Grade A Quenched and precipitation heat treated with a minimum specified tensile strength of 85 ksi for
thinner plates and 75 and 70 ksi for thicker plates, with the minimum tensile strength dependent upon the plate thickness. The
maximum thickness of Grade A, Class 3 plates is limited only by the capacity of the chemical composition and heat treatment to
meet the specified mechanical property requirements; however, current practice usually limits the maximum thickness to 8 in. [200
mm].
3
1.2.3.2 Available as Grade C with a specified minimum tensile strength of 95 ksi for plates ⁄4 in. [20 mm] and under in thickness
3
and 90 ksi for plates over ⁄4 in. in thickness. The maximum thickness of Grade C, Class 3, plates is 2 in. [50 mm].
1.3 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable
“M” specification designation (SI units), the material shall be furnished in inch-pound units.
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 this specification.
2. Referenced Documents
3
2.1 ASTM Standards:
A20/A20M Specification 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
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 for Boilers and Pressure Vessels.
Current edition approved Nov. 1, 2007Nov. 1, 2012. Published March 2008January 2013. Originally approved in 1976. Last previous edition approved in 20032007 as
A736/A736M – 03.A736/A736M – 03 (2007). DOI: 10.1520/A0736_A0736M-03R07.10.1520/A0736_A0736M-12.
2
For ASME Boiler and Pressure Vessel Code applications, see related Specification SA-736 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
...
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