ASTM A710/A710M-19

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.
Designation:A710/A710M −19
Standard Specification for
Precipitation–Strengthened Low-Carbon Nickel-Copper-
Chromium-Molybdenum-Columbium (Niobium) Alloy
1
Structural Steel Plates
This standard is issued under the fixed designationA710/A710M; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* 1.6 Grade B provides minimum yield strength levels rang-
ing from 70 to 75 ksi [485 to 515 MPa], depending on
1.1 This specification covers low-carbon precipitation —
thickness and condition.
strengthened nickel - copper - chromium - molybdenum -
1.7 Grade B plates are limited to a maximum thickness of 2
columbium (niobium) alloy steel plates for general applica-
in. [50 mm].
tions. The alloys in this specification are strengthened by
precipitation in various temperature ranges. Precipitation
1.8 Mandatory notch toughness requirements are specified
strengthening can occur upon air cooling after hot rolling,
for the three classes of Grade B.
during normalizing, and by another heat treatment. These
1.9 When the steel is to be welded, it is presupposed that a
grades are not intended for use in applications above 900°F
welding procedure suitable for the grade of steel and intended
[480°C].
use or service will be utilized. See Appendix X3 of Specifica-
1.2 Two grades, each with three classes, are provided as
tion A6/A6M for information on weldability.
follows:
1.10 The values stated in either inch-pound units or SI units
Grade and Class Condition
are to be regarded separately as standard. Within the text, the
SI units are shown in brackets. The values stated in each
Grade A, Class 1 as-rolled and precipitation heat treated
system are not exact equivalents; therefore, each system must
Grade A, Class 2 normalized and precipitation heat treated
Grade A, Class 3 quenched and precipitation heat treated
beusedindependentlyoftheother.Combiningvaluesfromthe
Grade B, Class 1 as-rolled
two systems may result in nonconformance with the specifi-
Grade B, Class 2 normalized
cation.
Grade B, Class 3 normalized and precipitation heat treated
1.11 This international standard was developed in accor-
1.3 Grade A provides minimum yield strength levels rang-
dance with internationally recognized principles on standard-
ing from 50 to 85 ksi [345 to 585 MPa], depending on
ization established in the Decision on Principles for the
thickness and condition.
Development of International Standards, Guides and Recom-
1.4 Grade A, Class 1, plates are limited to a maximum
mendations issued by the World Trade Organization Technical
3
thickness of ⁄4 in. [20 mm]. The maximum thickness of Grade
Barriers to Trade (TBT) Committee.
A, Classes 2 and 3, is limited only by the capacity of the
compositiontomeetthespecifiedmechanicalpropertyrequire-
2. Referenced Documents
ments;however,currentpracticenormallylimitsthemaximum 2
2.1 ASTM Standards:
thickness to 8 in. [200 mm].
A6/A6MSpecification for General Requirements for Rolled
Structural Steel Bars, Plates, Shapes, and Sheet Piling
1.5 Mandatory notch toughness requirements are specified
for Grade A, Class 1. A370Test Methods and Definitions for Mechanical Testing
of Steel Products
A673/A673MSpecification for Sampling Procedure for Im-
pact Testing of Structural Steel
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee
2
A01.02 on Structural Steel for Bridges, Buildings, Rolling Stock and Ships. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Nov. 1, 2019. Published November 2019. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1974. Last previous edition approved in 2013 as A710/A710M–02 Standards volume information, refer to the standard’s Document Summary page on
(2013). DOI: 10.1520/A0710_A0710M-19. the ASTM website.
*A Summary of Changes section appears at the end of this standard
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A710/A710M−19
3. Terminology 6.5 GradeB,Class2shallbenormalizedafterhotrollingby
reheatingto1600to1700°F[870to925°C],andthencooledin
3.1 Definitions of Terms Specific to This Standard:
still air.
3.1.1 precipitati
...