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ASTM A734/A734M-12

(Specification)

Standard Specification for Pressure Vessel Plates, Alloy Steel and High-Strength Low-Alloy Steel, Quenched-and-Tempered (Withdrawn 2017)

Standard Specification for Pressure Vessel Plates, Alloy Steel and High-Strength Low-Alloy Steel, Quenched-and-Tempered (Withdrawn 2017)

ABSTRACT
This specification covers quenched and tempered alloy steel and high strength low alloy steel plates for piping components and welded pressure vessels. The steel materials shall be killed and shall conform to the fine austenitic grain size requirement. The steel specimens shall undergo heat analysis and product analysis and shall conform to the required chemical compositions of carbon, manganese, phosphorus, sulfur, silicon, copper, nickel, chromium, molybdenum, aluminum, vanadium, nitrogen, and columbium. Tension tests shall be performed wherein the steel materials shall conform to the required values of yield strength, tensile strength, and elongation.
SCOPE
1.1 This specification covers quenched-and-tempered alloy steel and high-strength low-alloy steel plates for piping components and welded pressure vessels.
1.2 Two types are covered, which provide two different chemical compositions with the same tensile requirements. Both types are quenched-and-tempered to enhance mechanical properties.  
1.2.1 Type A is an alloy steel intended for use at low ambient temperatures of −80°F [−60°C] and higher.  
1.2.2 Type B is a high-strength low-alloy steel intended for use at ambient temperatures of −20°F [−30°C] and higher.  
1.3 The maximum thickness of plates is limited only by the capacity of the chemical composition and heat treatment to meet the specified mechanical property requirements. Individual manufacturers should be consulted on thickness limitations since current industry limitations have not been ascertained to date.  
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.
WITHDRAWN RATIONALE
This specification covers quenched-and-tempered alloy steel and high-strength low-alloy steel plates for piping components and welded pressure vessels.
Formerly under the jurisdiction of Committee A01 on Steel, Stainless Steel and Related Alloys, this specification was withdrawn in November 2017. This standard is being withdrawn without replacement due to its limited use by industry.

General Information

Status
Withdrawn
Publication Date
30-Apr-2012
Withdrawal Date
02-Nov-2017
ICS
77.140.30 - Steels for pressure purposes
Technical Committee
A01 - Steel, Stainless Steel and Related Alloys
Drafting Committee
A01.11 - Steel Plates for Boilers and Pressure Vessels
Current Stage
Ref Project

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ASTM A734/A734M-12 - Standard Specification for Pressure Vessel Plates, Alloy Steel and High-Strength Low-Alloy Steel, Quenched-and-Tempered (Withdrawn 2017)ASTM A734/A734M-12 - Standard Specification for Pressure Vessel Plates, Alloy Steel and High-Strength Low-Alloy Steel, Quenched-and-Tempered (Withdrawn 2017)
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ASTM A734/A734M-12 - Standard Specification for Pressure Vessel Plates, Alloy Steel and High-Strength Low-Alloy Steel, Quenched-and-Tempered (Withdrawn 2017)
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:A734/A734M −12
Standard Specification for
Pressure Vessel Plates, Alloy Steel and High-Strength Low-
1
Alloy Steel, Quenched-and-Tempered
This standard is issued under the fixed designationA734/A734M; 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* A577/A577MSpecification for Ultrasonic Angle-Beam Ex-
amination of Steel Plates
1.1 This specification covers quenched-and-tempered alloy
A578/A578MSpecification for Straight-Beam Ultrasonic
steel and high-strength low-alloy steel plates for piping com-
Examination of Rolled Steel Plates for Special Applica-
ponents and welded pressure vessels.
tions
1.2 Two types are covered, which provide two different
chemical compositions with the same tensile requirements.
3. General Requirements and Ordering Information
Both types are quenched-and-tempered to enhance mechanical
3.1 Material supplied to this material specification shall
properties.
conform to the requirements of Specification A20/A20M.
1.2.1 TypeAisanalloysteelintendedforuseatlowambient
These requirements outline the testing and retesting methods
temperatures of −80°F [−60°C] and higher.
andprocedures,permissiblevariationsindimensionsandmass,
1.2.2 Type B is a high-strength low-alloy steel intended for
quality, repair of defects, marking, loading, and ordering
use at ambient temperatures of −20°F [−30°C] and higher.
information.
1.3 The maximum thickness of plates is limited only by the
3.2 In addition to the basic requirements of this
capacity of the chemical composition and heat treatment to
specification,certainsupplementaryrequirementsareavailable
meet the specified mechanical property requirements. Indi-
when additional control, testing, or examination is required to
vidual manufacturers should be consulted on thickness limita-
meet end use requirements. The purchaser is referred to the
tions since current industry limitations have not been ascer-
listed supplementary requirements in this specification and to
tained to date.
the detailed requirements in Specification A20/A20M.
1.4 The values stated in either inch-pound units or SI units
3.3 If the requirements of this specification are in conflict
are to be regarded separately as standard. Within the text, the
withtherequirementsofSpecificationA20/A20M,therequire-
SI units are shown in brackets. The values stated in each
ments of this specification shall prevail.
system are not exact equivalents; therefore, each system must
beusedindependentlyoftheother.Combiningvaluesfromthe
4. Manufacture
two systems may result in nonconformance with the specifi-
4.1 Steelmaking Practice—The steel shall be killed and
cation.
shall conform to the fine austenitic grain size requirement of
2. Referenced Documents
Specification A20/A20M.
2
2.1 ASTM Standards:
5. Heat Treatment
A20/A20MSpecificationforGeneralRequirementsforSteel
Plates for Pressure Vessels
5.1 The plates shall be heat treated by quenching and
A435/A435MSpecification for Straight-Beam Ultrasonic
tempering. The austenitizing temperature shall be 1725°F
Examination of Steel Plates
[940°C] maximum. Tempering temperature shall be 1150 to
1300°F [620 to 705°C].
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
5.2 If the purchaser elects to perform the heat treatment, the
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee
material shall be accepted on the basis of mill tests made from
A01.11 on Steel Plates for Boilers and Pressure Vessels.
testcouponsheattreatedinaccordancewiththepurchaseorder
Current edition approved May 1, 2012. Published June 2012. Originally
requirements. If the test coupon heat treatment is not indicated
approved in 1976. Last previous edition approved in 2007 as A734/
A734M–87a(2007). DOI: 10.1520/A0734_A0734M-12.
on the purchase order, the manufacturer shall heat treat the test
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
coupons under conditions he considers appropriate.The manu-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
facturer shall inform the purchaser of the heat-treat procedure
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. followed in treatment of the test coupon.
*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. United States
1

---------------------- Page: 1 ----------------------
A734/A734M−12
TABLE 1 Chemical Requirements
Type A Type B
Element
Heat Product Heat Product
Analysis,
...

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1.7 The values stated in either inch-pound units or SI [metric] units are to be regarded separately as standard; within the text and tables, the SI units are shown in brackets. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.8 Unless the order specifies the applicable “M” specification designation, the material shall be furnished to the inch-pound units.  
1.9 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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This specification covers molybdenum alloy steel plates, intended particularly for welded boilers and other pressure vessels. Plates under this specification are available in three grades having different strength levels: Grade A; Grade B; and Grade C. The steel shall be killed. The steel shall conform to the chemical requirements specified. Tension tests on plates shall conform to the requirements specified.
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1.4 For plates produced from coil and furnished without heat treatment or with stress relieving only, the additional requirements, including additional testing requirements and the reporting of additional test results, of Specification A20/A20M apply.  
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1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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