ASTM A289/A289M-97

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: A 289/A 289M – 97
Standard Specification for
Alloy Steel Forgings for Nonmagnetic Retaining Rings for
Generators
This standard is issued under the fixed designation A 289/A 289M; 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 ing information, manufacturing requirements, testing methods
and retesting procedures, marking, certification, product analy-
1.1 This specification covers nonmagnetic alloy steel retain-
sis variation, and additional supplementary requirements.
ing ring forgings for generators.
3.2 If the requirements of this specification are in conflict
1.2 The values stated in either inch-pound units or SI
with the requirements of Specification A 788, the requirements
(metric) units are to be regarded separately as standards.
of this specification shall prevail.
Within the text and tables, the SI units are shown in brackets.
3.3 Supplementary requirements of an optional nature are
The values stated in each system are not exact equivalents;
provided. They shall apply only when specified by the pur-
therefore each system must be used independent of the other.
chaser.
Combining values from the two systems may result in noncon-
formance with the specification.
4. Manufacture
1.3 Unless the order specifies the applicable “M” specifica-
4.1 The steel shall be made by the electro-slag-remelt (ESR)
tion designation, the material shall be furnished to the inch-
process. The electrodes shall be made by either the basic
pound units.
electric furnace or ladle refining processes.
2. Referenced Documents 4.2 Sufficient discard shall be taken from each ingot to
secure freedom from piping and undue segregation.
2.1 ASTM Standards:
4.3 Forged rings shall be solution treated following hot
A 342 Test Methods for Permeability of Feebly Magnetic
working and prior to the cold expansion procedure.
Materials
4.4 Rings shall be rough machined prior to cold expansion
A 370 Test Methods and Definitions for Mechanical Testing
or final heat treatment.
of Steel Products
4.5 Rings shall be expanded by an appropriate method such
A 531/A 531M Practice for Ultrasonic Inspection of
as segmented dies, tapered plug, etc. in the temperature range
Turbine-Generator Steel Retaining Rings
of 60 to 390°F [15 to 200°C] in order to develop the required
A 788 Standard Specification for Steel Forgings, General
tensile properties.
Requirements
4.6 After cold expansion, the rings shall be heated to
E 45 Practice for Determining the Inclusion Content of
between 575 and 750°F [300 to 400°C] at a rate not to exceed
Steel
5 75°F [40°C]/h, held at this temperature for 6 to 12 h, and then
E 112 Test Method for Determining Average Grain Size
slow cooled to ambient temperature.
E 165 Practice for Liquid Penetrant Examination
5. Chemical Requirements
3. Ordering Information and General Requirements
5.1 Heat Analysis—The heat analysis obtained from sam-
3.1 Material supplied to this specification shall conform to
pling in accordance with Specification A 788 shall comply with
the requirements of Specification A 788, which outlines order-
Table 1 of this specification.
5.2 Product Analysis—When a product analysis is per-
This specification is under the jurisdiction of ASTM Committee A-1 on Steel,
formed at the request of the purchaser, the provisions of Table
Stainless Steel and Related Alloys, and is the direct responsibility of Subcommittee
1 of Specification A 788 shall apply. The analysis shall be
A01.06 on Steel Forgings and Billets.
made from a forging representing each heat.
Current edition approved Nov. 10, 1997. Published August 1998. Originally
published as A 289 – 46. Last previous edition A 289 – 94.
NOTE 1—The material shown in Table 1 of A 289/A 289M was
Annual Book of ASTM Standards, Vol 03.04.
formerly known as Class C.
Annual Book of ASTM Standards, Vol 01.03.
Annual Book of ASTM Standards, Vol 01.05.
Annual Book of ASTM Standards, Vol 03.01.
Annual Book of ASTM Standards, Vol 03.03.
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
A 289/A 289M – 97
TABLE 1 Chemical Requirements
forged at one or both ends of the ring, as shown in Fig. 1. The
Composition, weight % specimens shall be removed after cold working and subsequent
stress relief.
Carbon 0.10 max
Manganese 17.5–20.0
8.3 A minimum of one set of three tangentially oriented
Phosphorus 0.060 max
Charpy V-notch specimens shall be removed from the inside
Sulfur 0.015 max
diameter location of the test prolongation as shown in Fig. 1.
Silicon 0.80 max
Nickel 2.00 max
The notch shall be aligned parallel to the longitudinal axis of
Chromium 17.5–20.0
the ring. The purchaser may specify that the side of the
Nitrogen 0.45-0.80
specimen to be notched and the distance of the root of the notch
Titanium 0.10 max
Aluminum 0.04 max
from the inside diameter of the ring be different from that
Vanadium 0.25 max
shown in Fig. 1.
9. Metallographic Tests
6. Mechanical Properties
9.1 The inclusion content of the material shall be deter-
mined in accordance with Method A of Practice E 45 utilizing
6.1 The rings shall conform to the tensile properties for the
a sample
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