ASTM A859/A859M-02

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Designation: A 859/A 859M – 02
Standard Specification for
Age-Hardening Alloy Steel Forgings for Pressure Vessel
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Components
This standard is issued under the fixed designation A 859/A 859M; 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 370 Test Methods and Definitions for Mechanical Testing
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of Steel Products
1.1 This specification covers requirements for low-carbon
A 388/A 388M Practice for Ultrasonic Examination of
age-hardening nickel-copper-chromium-molybdenum-col-
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Heavy Steel Forgings
umbium alloy steel forgings for pressure vessel components.
A 788 Specification for Steel Forgings, General Require-
1.2 Forgings under this specification are available in two
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ments
classes as follows:
E 208 Test Method for Conducting Drop-Weight Test to
1.2.1 Class 1—Normalized-and-precipitation-heat-treated,
Determine Nil-Ductility Transition Temperature of Ferritic
providing a minimum yield strength of 55 ksi [380 MPa] and
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Steels
a minimum tensile strength of 65 ksi [450 MPa].
2.2 ASME Standard:
1.2.2 Class 2—Quenched-and-precipitation-heat-treated,
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ASME Code Section IX Boiler and Pressure Vessel
providing a minimum yield strength of 65 ksi [450 MPa] and
Code—Section IX, Welding Qualifications
a minimum tensile strength of 75 ksi [MPa].
1.3 Although the material is readily weldable, welding
3. Ordering Information and General Requirements
procedures are of fundamental importance and must be such as
3.1 In addition to the ordering information required by
not to affect adversely the properties of the material, especially
Specification A 788, the purchaser shall include with the
in the heat-affected zone. It is presupposed that welding
inquiry and order a detailed drawing, sketch, or written
procedures will be suitable for the material being welded.
description of the forging and the method of selecting test
1.4 Supplementary requirements are provided for use when
location (see 6.3). When appropriate, the areas of significant
additional testing or inspection is desired. These shall apply
loading in the forging shall be designated.
only when specified individually by the purchaser in the order.
3.2 Material supplied to this specification shall conform to
1.5 The values stated in either inch-pound or SI units are to
the requirements of Specification A 788, which outlines addi-
be regarded separately as standard. Within the text, the SI units
tional ordering information, manufacturing requirements, test-
are shown in brackets. The values stated in each system are not
ing and retesting methods and procedures, marking, certifica-
exact equivalents; therefore, each system must be used inde-
tion, product analysis variations, and additional supplementary
pendently of the other. Combining values from the two systems
requirements.
may result in nonconformance with the specification.
3.3 If the requirements of this specification are in conflict
1.6 This specification is expressed in both inch-pound and
with the requirements of Specification A 788, the requirements
SI units. However, unless the order specifies the applicable
of this specification shall prevail.
“M” specification designation [SI units], the material shall be
furnished to inch-pound units.
4. Manufacture
2. Referenced Documents 4.1 Melting Practice—The steel shall be made to a killed,
fine austenitic grain size, practice.
2.1 ASTM Standards:
4.2 Heat Treatment:
A 275/A 275M Test Method for Magnetic Particle Exami-
2 4.2.1 Class 1 material shall be normalized at a temperature
nation of Steel Forgings
in the range from 1600 to 1725°F [870 to 940°C] and then
precipitation heat treated in the range from 1000 to 1225°F
[540 to 665°C] for a time to be determined by the material
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This specification is under the jurisdiction of ASTM Committee A01 on Steel, manufacturer.
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee
A01.06 on Steel Forgings and Billets.
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Current edition approved September 10, 2002. Published June 2003. Originally Annual Book of ASTM Standards, Vol 01.03.
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published in 1986 as A 859/A 859M – 86. Last previous edition approved in 1988 as Annual Book of ASTM Standards, Vol 03.01.
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A 859/A 859M – 95 (1999). Available from American Society of Mechanical Engineers, 345 E. 47th St.,
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Annual Book of ASTM Standards, Vol 01.05. New York, NY 10017.
*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.
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A 859/A 859M – 02
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