ASTM A592/A592M-89(1999)

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Designation: A 592/A 592M – 89 (Reapproved 1999)
Standard Specification for
High-Strength Quenched and Tempered Low-Alloy Steel
Forged Fittings and Parts for Pressure Vessels
This standard is issued under the fixed designation A 592/A 592M; 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 E 112 Test Methods for Determining the Average Grain
2 Size
1.1 This specification covers high-strength quenched and
tempered low-alloy steel forged fittings and parts for pressure
3. Ordering Information and General Requirements
vessels. The maximum thickness of forgings under this speci-
3.1 In addition to the ordering information required by
1 3
fication shall be 1 ⁄2 in. [38 mm] for Grade A, and 3 ⁄4 in. [95
Specification A 788, the purchaser shall include with the
mm] for Grades E and F (4 in. [102 mm] maximum as heat
inquiry and order a detailed drawing, a sketch, or written
treated).
description of the forging.
NOTE 1—These grades are similar to corresponding grades in Specifi-
3.2 Material supplied to this specification shall conform to
cation A 517/A 517M.
the requirements of Specification A 788, which outlines addi-
1.2 Welding technique is of fundamental importance and it
tional ordering information, manufacturing requirements, test-
is presupposed that welding procedures will be in accordance
ing and retesting methods and procedures, marking, certifica-
with approved methods for the class of material used.
tion, product analysis variations, and additional supplementary
1.3 The values stated in either inch-pound units or SI
requirements.
(metric) units are to be regarded separately as the standard;
3.3 If the requirements of this specification are in conflict
within the text and tables, the SI units are shown in [brackets].
with the requirements of Specification A 788, the requirements
The values stated in each system are not exact equivalents;
of this specification shall prevail.
therefore, each system must be used independently of the other.
4. Materials and Manufacture
Combining values from the two systems may result in noncon-
formance with the specification. 4.1 Melting Process—The steel shall be made in accordance
1.4 Unless the order specifies the applicable “M” specifica- with the Melting Process Section of Specification A 788.
tion designation, the material shall be furnished to the inch-
4.2 Grain Size—The steel shall be fully killed, fine grained
pound units. (ASTM No. 5 or finer), as determined in accordance with Test
Methods E 112, Plate IV.
2. Referenced Documents
4.3 Discard—Sufficient discard shall be made from each
2.1 ASTM Standards:
ingot to ensure freedom from piping and excessive segregation.
A 370 Test Methods and Definitions for Mechanical Testing
4.4 The finished product shall be a hot-worked forging as
of Steel Products
defined by Specification A 788, and shall be forged as close as
A 517/A 517M Specification for Pressure Vessel Plates,
practicable to the finished shape and size.
Alloy Steel, High-Strength, Quenched and Tempered
5. Heat Treatment
A 788 Specification for Steel Forgings, General Require-
ments 5.1 After forging and before reheating, the forgings shall be
cooled to provide substantially complete transformation of
austenite. Heat treatment for properties shall consist of heating
This specification is under the jurisdiction of ASTM Committee A-1 on Steel,
the forgings to not less than 1650°F [900°C], quenching in a
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
liquid medium, and tempering at 1150°F [620°C] minimum,
A01.06 on Steel Forgings and Billets.
Current edition approved May 17, 1989. Published July 1989. Originally with a holding time of 1 h/in. [1 h/25 mm] minimum, but in no
1 1
published as A 592 – 68. Last previous edition A 592 – 88.
case less than ⁄2 h. Forgings with sections over 2 ⁄2 to 4 in. [65
For ASME Boiler and Pressure Vessel Code applications see related Specifi-
to 100 mm] inclusive, shall be liquid quenched from a
cation SA-592/SA-592M in Section II of that Code.
Annual Book of ASTM Standards, Vol 01.03.
Annual Book of ASTM Standards, Vol 01.04.
5 6
Annual Book of ASTM Standards, Vol 01.05. Annual Book of ASTM Standards, Vol 03.01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
A 592/A 592M – 89 (1999)
TABLE 2 Tensile Requirements
temperature not less than 1750°F [955°C] prior to the above
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treatment for properties. Up to 2 ⁄2 in. Over 2 ⁄2 in. to 4 in.
[65 mm], incl [65 to 100 mm], incl
Tensile strength, psi (MPa) 115 000 to 135 000 105 000 to 135 000
6. Chemical Requirements
[795 to 930] [725 to 930]
6.1 Heat Analysis—The heat analysis obtained from sam-
Yield strength (0.2 % offset), min, 100 000 [690] 90 000 [620]
psi [MPa]
pling in accordance with Specification A 788 shall comply with
Elongation in 2 in. [50 mm], 18 17
Table 1.
min, %
6.2 Product Analysis—The purchaser may use the product
Reduction of area, min, % 45 40
analysis provision of Specification A 788 to obtain a product
analysis from a forging representing each heat or multiple heat.
pounds (or joules) and the fracture appearance in percent shear
7. Mechanical Requirements
shall be recorded and reported for information.
7.1 The forgings as represented by tension tests shall
7.2 Sampling:
conform to the requirements prescribed in Table 2. Charpy
7.2.1 Samples for mechanical test specimens shall be re-
V-notch impact specimens shall have a lateral expansion
moved after the quenching and tempering heat treatment. The
opposite the notch of not less than 0.015 in. (15 mils) [0.38
purchaser shall specify any additional thermal treatments that
mm]. In addition the values of energy absorption in foot-
shall be given to the test specimens in addition to the heat
treatment specified in 5.1. (This is intended to simulate thermal
treatments which may subsequently be performed by the
TABLE 1 Chemical Requirements
fabricator.)
Element Composition, %
7.2.2 Samples shall be removed so that the test specimens
A A A
Grade A Grade E Grade F
will have their major axes parallel to the direction of maj
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