ASTM A288-91(2003)

Standard Specification for Carbon and Alloy Steel Forgings for Magnetic Retaining Rings for Turbine Generators

SCOPE
1.1 This specification covers quenched and tempered carbon and alloy steel forgings for magnetic retaining rings for turbine generators.
1.2 Supplementary requirements of an optional nature are provided. These shall apply only when specified by the purchaser.
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

General Information

• Status: Historical
• Publication Date: 09-Apr-2003
• ICS: 77.140.85 - Iron and steel forgings
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.06 - Steel Forgings and Billets

Relations

• Replaces: ASTM A288-91(1998) - Standard Specification for Carbon and Alloy Steel Forgings for Magnetic Retaining Rings for Turbine Generators
• Effective Date: 10-Apr-2003
• Replaced By: ASTM A288-91(2008) - Standard Specification for Carbon and Alloy Steel Forgings for Magnetic Retaining Rings for Turbine Generators
• Effective Date: 01-Mar-2008
• Referred By: ASTM A788/A788M-23 - Standard Specification for Steel Forgings, General Requirements
• Effective Date: 10-Apr-2003
• Referred By: ASTM A531/A531M-18(2023) - Standard Practice for Ultrasonic Examination of Turbine-Generator Steel Retaining Rings
• Effective Date: 10-Apr-2003

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 288 – 91 (Reapproved 2003)
Standard Specification for
Carbon and Alloy Steel Forgings for Magnetic Retaining
Rings for Turbine Generators
This standard is issued under the fixed designation A 288; 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 4.2 Vacuum Degassing—For Class 3 machined forgings
over 2 ⁄2 in. (63.5 mm) wall thickness, and Classes 4 to 8, the
1.1 Thisspecificationcoversquenchedandtemperedcarbon
molten steel shall be vacuum treated immediately prior to or
and alloy steel forgings for magnetic retaining rings for turbine
during the operation of pouring the ingot in order to remove
generators.
objectionable gases, especially hydrogen.
1.2 Supplementary requirements of an optional nature are
4.3 Discard—Sufficient discard shall be made from each
provided. These shall apply only when specified by the
ingot to secure freedom from piping and undue segregation.
purchaser.
4.4 Heat Treatment:
1.3 The values stated in inch-pound units are to be regarded
4.4.1 Heat Treatment for Mechanical Properties—Heat
as the standard. The values given in parentheses are for
treatment for properties shall be by quenching and tempering.
information only.
4.4.2 Tempering Temperature—The final tempering tem-
2. Referenced Documents perature shall be not less than 1100°F (595°C).
4.5 Machining:
2.1 ASTM Standards:
4.5.1 Preliminary Machining—Forgings shall be machined
A 275/A 275M Test Method for Magnetic Particle Exami-
all over prior to quenching and tempering for mechanical
nation of Steel Forgings
properties.
A 531/A 531M Practice for Ultrasonic Examination of
4.5.2 Machine to Purchaser’s Requirements for
Turbine-Generator Steel Retaining Rings
Shipment—If required, forgings shall be machined to the
A 788 Specification for Steel Forgings, General Require-
dimensions shown on the purchaser’s drawing prior to ship-
ments
ment.
3. Ordering Information
5. Chemical Composition
3.1 In addition to the ordering information required by
5.1 The steel shall conform to the chemical composition
Specification A 788, the purchaser shall include with the
prescribed in Table 1.
inquiry and order a detailed drawing, sketch, or written
5.2 Heat Analysis—The heat analysis obtained from sam-
description of the forging, including the number and location
plinginaccordancewithSpecificationA 788shallcomplywith
of mechanical test specimens.
Table 1.
4. Manufacture
5.3 Product Analysis—The purchaser may use the product
analysis provision of Table 1 of Specification A 788 to obtain
4.1 The melting processes of Specification A 788 shall be
a product analysis from a forging representing each heat or
applicable except that the basic electric furnace process shall
multiple heat.
be used if separate refining or remelting is not employed.
6. Mechanical Properties
6.1 Tensile Requirements—The material shall conform to
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
the requirements for tensile properties prescribed in Table 2.
A01.06 on Steel Forgings and Billets.
6.2 Notch Toughness Requirements—The material shall
Current edition approved April 10, 2003. Published July 2003. Originally
conform to the requirements for notch toughness as prescribed
approved in 1946. Last previous edition approved in 1998 as A 288 – 91(1998).
Annual Book of ASTM Standards, Vol 01.05. in Table 2.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
A 288 – 91 (2003)
TABLE 1 Chemical Requirements
both ends of the forging. The direction of the notch of the
Class 1, % Classes 2 Classes 4, 5, 6, 7, Charpy bars shall be radial.All test specimens shall be located
and 3, % and 8, %
at midwall and at a distance at least equal to one-half the wall
Carbon, max 0.50 max 0.45 max 0.45
thickness from the end face of the prolongation.
Manganese 0.60–1.00 0.60–1.00 1.00 max
Phosphorus, max 0.025 0.025 0.025 8.2 Removal—All tension and notch tou
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