ASTM A982/A982M-05(2010)
(Specification)Standard Specification for Steel Forgings, Stainless, for Compressor and Turbine Airfoils
Standard Specification for Steel Forgings, Stainless, for Compressor and Turbine Airfoils
ABSTRACT
This specification covers stainless steel forgings for compressor and turbine bucket, blade, and airfoil applications. The stainless steel shall be made by the melting process and either the closed impression die or the open die forging processes may be utilized. Two complete heat treatments, consisting of an austenize, quench, and temper, are permitted. When heat treatment for mechanical properties is followed by straightening, a stress-relieving heat treatment is required. The forgings shall be subjected to tension, impact, hardness, and non-destructive tests. All forgings shall be free of cracks, seams, laps, shrinkage, and similar discontinuities.
SCOPE
1.1 This specification covers stainless steel forgings for compressor and turbine bucket, blade, and airfoil applications.
1.2 This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order or contract specifies the applicable M designation (SI units), the inch-pound units shall apply. The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: A982/A982M – 05 (Reapproved 2010)
Standard Specification for
Steel Forgings, Stainless, for Compressor and Turbine
1
Airfoils
This standard is issued under the fixed designationA982/A982M; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4. General Requirements
1.1 This specification covers stainless steel forgings for 4.1 Materials supplied to this specification shall conform to
compressor and turbine bucket, blade, and airfoil applications. the requirements of Specification A788/A788M, which out-
1.2 This specification is expressed in both inch-pound units lines additional ordering information, manufacturing require-
and in SI units; however, unless the purchase order or contract ments, testing and retesting methods and procedures, marking,
specifies the applicable M designation (SI units), the inch- certification, product analysis variations and additional supple-
pound units shall apply. The values stated in either inch-pound mentary requirements.
units or SI units are to be regarded separately as standard. 4.2 If the requirements of this specification are in conflict
Within the text, the SI units are shown in brackets. The values with the requirements of Specification A788/A788M, the
stated in each system may not be exact equivalents; therefore, requirements of this specification shall prevail.
each system shall be used independently of the other. Combin-
5. Manufacture
ingvaluesfromthetwosystemsmayresultinnonconformance
5.1 Melting Process—All melting processes of Specifica-
with the standard.
tion A788/A788M are permitted unless Supplementary Re-
2. Referenced Documents
quirement S1 is invoked by the purchaser.
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2.1 ASTM Standards: 5.2 Forging Process—Either the closed impression die or
A275/A275M Practice for Magnetic Particle Examination the open die forging processes may be utilized unless the
of Steel Forgings purchaser specifies one or the other.
A788/A788M Specification for Steel Forgings, General Re- 5.2.1 Forging Temperature—The maximum part tempera-
quirements ture during forging shall be 2150°F [1175°C].
E381 Method of Macroetch Testing Steel Bars, Billets, 5.3 Heat Treatment—Heat treating all forgings is required
Blooms, and Forgings in accordance with Table 1 to develop the required mechanical
E562 Test Method for Determining Volume Fraction by properties.
Systematic Manual Point Count 5.3.1 Number of Heat Treatments—Two complete heat
treatments, consisting of an austenitize, quench, and temper,
3. Ordering Information
are permitted. Purchaser approval is required prior to any
3.1 In addition to the ordering information required by
additional heat treatments.
Specification A788/A788M, the purchaser shall include a 5.3.2 Temperature Variation—Heat treating temperatures
sketchorwrittendescriptionoftheforgingwiththeinquiryand
shall be controlled in the range of 625°F [614°C].
order. 5.4 Stress Relief—When heat treatment for mechanical
properties is followed by straightening, a stress-relieving heat
treatmentisrequiredatatemperaturemeetingtherequirements
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
of Table 1.
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
5.4.1 QuenchingafterStressRelief—Wateroroilquenching
A01.06 on Steel Forgings and Billets.
Current edition approved April 1, 2010. Published May 2010. Originally
of stress-relieved forgings is prohibited.
published in 1998. Last previous edition approved in 2005 as A982/A982M – 05.
DOI: 10.1520/A0982_A0982M-05R10.
6. Chemical Composition
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM 6.1 Thesteelshallconformtotherequirementsforchemical
Standards volume information, refer to the standard’s Document Summary page on
composition prescribed in Table 2.
the ASTM website.
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A982/A982M – 05 (2010)
TABLE 1 Heat Treatment, °F [°C]
Grade A Grade B Grade C Grade D Grade E Grade F
Classes1&2 Class1 Class1 Class2 Classes1&2 Class1 Class2 Class1
Austenitizing 1725-1775 1600-1750 1825-1875 1725-1875 1875-1925 2075-2125 1725-1775 1875-1925
[940-970] [870-955] [995-1025] [940-1025] [1025-1050] [1135-1165] [940-970] [1025-1050]
Quenching Air or liquid Air or liquid Air or liquid Air or liquid Air or liquid Air or liquid Air or liquid Air or liquid
Single tempering 1050 min 1050 min 1050 min 1050 min 115
...
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