ASTM A982/A982M-10(2020)

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 are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 29-Feb-2020
• 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

• Referred By: ASTM A788/A788M-23 - Standard Specification for Steel Forgings, General Requirements
• Effective Date: 01-Mar-2020

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: A982/A982M −10 (Reapproved 2020)
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.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope E562Test Method for Determining Volume Fraction by
Systematic Manual Point Count
1.1 This specification covers stainless steel forgings for
compressor and turbine bucket, blade, and airfoil applications.
3. Ordering Information
1.2 This specification is expressed in both inch-pound units
3.1 In addition to the ordering information required by
and in SI units; however, unless the purchase order or contract
Specification A788/A788M, the purchaser shall include a
specifies the applicable M designation (SI units), the inch-
sketchorwrittendescriptionoftheforgingwiththeinquiryand
pound units shall apply.The values stated in either inch-pound
order.
units or SI units are to be regarded separately as standard.
4. General Requirements
Within the text, the SI units are shown in brackets. The values
stated in each system are not necessarily exact equivalents;
4.1 Materials supplied to this specification shall conform to
therefore, to ensure conformance with the standard, each the requirements of Specification A788/A788M, which out-
system shall be used independently of the other, and values
lines additional ordering information, manufacturing
from the two systems shall not be combined. requirements, testing and retesting methods and procedures,
marking, certification, product analysis variations and addi-
1.3 This international standard was developed in accor-
tional supplementary requirements.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
4.2 If the requirements of this specification are in conflict
Development of International Standards, Guides and Recom-
with the requirements of Specification A788/A788M, the
mendations issued by the World Trade Organization Technical
requirements of this specification shall prevail.
Barriers to Trade (TBT) Committee.
5. Manufacture
2. Referenced Documents
5.1 MeltingProcess—AllmeltingprocessesofSpecification
2
2.1 ASTM Standards: A788/A788M are permitted unless Supplementary Require-
ment S1 is invoked by the purchaser.
A275/A275MPracticeforMagneticParticleExaminationof
Steel Forgings
5.2 Forging Process—Either the closed impression die or
A788/A788MSpecification for Steel Forgings, General Re-
the open die forging processes may be utilized unless the
quirements
purchaser specifies one or the other.
E112Test Methods for Determining Average Grain Size
5.2.1 Forging Temperature—The maximum part tempera-
E292Test Methods for Conducting Time-for-Rupture Notch
ture during forging shall be 2150°F [1175°C].
Tension Tests of Materials
5.3 HeatTreatment—Heattreatingallforgingsisrequiredin
E381Method of Macroetch Testing Steel Bars, Billets,
accordance with Table 1 to develop the required mechanical
Blooms, and Forgings
properties.
5.3.1 Number of Heat Treatments—Two complete heat
treatments, consisting of an austenitize, quench, and temper,
are permitted. Purchaser approval is required prior to any
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee additional heat treatments.
A01.06 on Steel Forgings and Billets.
5.3.2 Temperature Variation—Heat treating temperatures
Current edition approved March 1, 2020. Published March 2020. Originally
shall be controlled in the range of 625°F [614°C].
published in 1998. Last previous edition approved in 2015 as A982/A982M–10
(2015). DOI: 10.1520/A0982_A0982M–10R20.
5.4 Stress Relief—When heat treatment for mechanical
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
properties is followed by straightening, a stress-relieving heat
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
treatmentisrequiredatatemperaturemeetingtherequirements
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. of Table 1.
*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
1

---------------------- Page: 1 ----------------------
A982/A982M − 10 (2020)
TABLE 1 Heat Treatment, °
...