ASTM A737/A737M-99
(Specification)Standard Specification for Pressure Vessel Plates, High-Strength, Low-Alloy Steel
Standard Specification for Pressure Vessel Plates, High-Strength, Low-Alloy Steel
SCOPE
1.1 This specification covers high-strength low-alloy steel plates for service in welded pressure vessels and piping components.
1.2 This material is particularly intended for piping and pressure vessel applications where high strength and improved toughness are required.
1.3 Two grades, designated B and C, are covered by this specification. Grade B provides a minimum yield strength of 50 ksi [345 MPa]. Grade C provides a minimum yield strength of 60 ksi [415 MPa].
1.4 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.
1.5 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 noncomformance with the specification.
General Information
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: A 737/A 737M – 99
Standard Specification for
Pressure Vessel Plates, High-Strength, Low-Alloy Steel
This standard is issued under the fixed designation A 737/A 737M; 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 A 577/A 577M Specification for Ultrasonic Angle-Beam
2 Examination of Steel Plates
1.1 This specification covers high-strength low-alloy steel
A 578/A 578M Specification for Straight-Beam Ultrasonic
plates for service in welded pressure vessels and piping
Examination of Plain and Clad Steel Plates for Special
components.
Applications
1.2 This material is particularly intended for piping and
pressure vessel applications where high strength and improved
3. General Requirements and Ordering Information
toughness are required.
3.1 Material supplied to this specification shall conform to
1.3 Two grades, designated B and C, are covered by this
the requirements of Specification A 20/A 20M. These require-
specification. Grade B provides a minimum yield strength of
ments outline the testing and retesting methods and procedures,
50 ksi [345 MPa]. Grade C provides a minimum yield strength
permissible variations in dimensions and mass, quality, repair
of 60 ksi [415 MPa].
of defects, marking, loading, etc.
1.4 The maximum thickness of plates is limited only by the
3.2 Specification A 20/A 20M also establishes the rules for
capacity of the chemical composition and heat treatment to
compliance to the ordering information when purchasing
meet the specified mechanical property requirements. Indi-
material to this specification.
vidual manufacturers should be consulted on thickness limita-
3.3 Certain supplementary requirements considered suitable
tions since current industry limitations have not been ascer-
for use with this specification are listed at the end of the
tained to date.
specification. These include some of the standardized supple-
1.5 The values stated in either inch-pound units or SI units
mentary requirements listed in Specification A 20/A 20M as
are to be regarded separately as standard. Within the text, the
well as additional ones unique to this specification.
SI units are shown in brackets. The values stated in each
system are not exact equivalents; therefore, each system must
4. Manufacture
be used independently of the other. Combining values from the
4.1 Steelmaking Practice—The steel shall be killed and
two systems may result in noncomformance with the specifi-
shall conform to the fine austenitic grain size requirement of
cation.
Specification A 20/A 20M.
2. Referenced Documents
5. Heat Treatment
2.1 ASTM Standards:
5.1 The material shall be normalized by heating to a suitable
A 20/A 20M Specification for General Requirements for
3 temperature which produces an austenitic structure, but not
Steel Plates for Pressure Vessels
exceeding 1700°F [925°C], holding a sufficient time to attain
A 435/A 435M Specification for Straight-Beam Ultrasonic
3 uniform heat throughout the material, and cooling in air.
Examination of Steel Plates
5.2 If approved by the purchaser, cooling rates faster than
air cooling are permitted for improvement of strength or
toughness, provided the plates are subsequently tempered in
This specification is under the jurisdiction of ASTM Committee A-1 on Steel,
the temperature range from 1100 to 1300°F [595 to 705°C].
Stainless Steel and Related Alloys, and is the direct responsibility of Subcommittee
5.3 If the purchaser elects to perform the required heat
A01.11 on Steel for Boilers and Pressure Vessels.
treatment, the material shall be accepted on the basis of mill
Current edition approved June 10, 1999. Published September 1999. Originally
published as A 737 – 76. Last previous edition A 737/A 737M – 87 (Reapproved
tests made from test coupons heat treated in accordance with
1997).
the purchase order requirements. If the test coupon heat-
For ASME Boiler and Pressure Vessel Code applications see related Specifi-
treatment requirements are not indicated on the purchase order,
cation SA-737 in
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