ASTM A734/A734M-87a(2007)
(Specification)Standard Specification for Pressure Vessel Plates, Alloy Steel and High-Strength Low-Alloy Steel, Quenched-and-Tempered
Standard Specification for Pressure Vessel Plates, Alloy Steel and High-Strength Low-Alloy Steel, Quenched-and-Tempered
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.
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 – 87a (Reapproved 2007)
Standard Specification for
Pressure Vessel Plates, Alloy Steel and High-Strength Low-
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 Examination of Steel Plates
A577/A577M Specification for UltrasonicAngle-Beam Ex-
1.1 This specification covers quenched-and-tempered alloy
amination of Steel Plates
steel and high-strength low-alloy steel plates for piping com-
A578/A578M Specification for Straight-Beam Ultrasonic
ponents and welded pressure vessels.
Examination of Rolled Steel Plates for Special Applica-
1.2 Two types are covered, which provide two different
tions
chemical compositions with the same tensile requirements.
Both types are quenched-and-tempered to enhance mechanical
3. Manufacture
properties.
3.1 Steelmaking Practice—The steel shall be killed and
1.2.1 Type A is an alloy steel intended for use at low
shall conform to the fine austenitic grain size requirement of
ambient temperatures of −80°F [−60°C] and higher.
Specification A20/A20M.
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.
4. Heat Treatment
1.3 The maximum thickness of plates is limited only by the
4.1 The plates shall be heat treated by quenching and
capacity of the chemical composition and heat treatment to
tempering. The austenitizing temperature shall be 1725°F
meet the specified mechanical property requirements. Indi-
[940°C] maximum. Tempering temperature shall be 1150 to
vidual manufacturers should be consulted on thickness limita-
1300°F [620 to 705°C].
tions since current industry limitations have not been ascer-
4.2 If the purchaser elects to perform the heat treatment, the
tained to date.
material shall be accepted on the basis of mill tests made from
1.4 The values stated in either inch-pound units or SI units
testcouponsheattreatedinaccordancewiththepurchaseorder
are to be regarded separately as standard. Within the text, the
requirements. If the test coupon heat treatment is not indicated
SI units are shown in brackets. The values stated in each
on the purchase order, the manufacturer shall heat treat the test
system are not exact equivalents; therefore, each system must
coupons under conditions he considers appropriate.The manu-
beusedindependentlyoftheother.Combiningvaluesfromthe
facturer shall inform the purchaser of the heat-treat procedure
two systems may result in nonconformance with the specifi-
followed in treatment of the test coupon.
cation.
5. General Requirements and Basis of Purchase
2. Referenced Documents
5.1 Material supplied to this material specification shall
2.1 ASTM Standards:
conform to the requirements of Specification A20/A20M.
A20/A20M Specification for General Requirements for
These requirements outline the testing and retesting methods
Steel Plates for Pressure Vessels
and procedures, permissible variations in dimensions and
A435/A435M Specification for Straight-Beam Ultrasonic
weight, quality, repair of defects, marking, loading, etc.
5.2 Specification A20/A20M also establishes the rules for
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, compliance to the basis of purchase when purchasing material
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee
to this specification.
A01.11 on Steel Plates for Boilers and Pressure Vessels.
5.3 Certainsupplementaryrequirementsconsideredsuitable
Current edition approved Nov. 1, 2007. Published March 2008. Originally
for use with this specification are listed at the end of the
approved in 1976. Last previous edition approved in 2003 as A734/
A734M–87a(2003). DOI: 10.1520/A0734_A0734M-87AR07.
specification. These include some of the standardized supple-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
mentary requirements listed in Specification A20/A20M as
...
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