Standard Specification for Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

07-03-2022

Publisher

American Society for Testing and Materials

1.1This specification covers premium quality alloy steel semifinished rolled or forged blooms and billets for reforging into critical parts such as aircraft landing-gear forgings.

1.2Blooms and billets, hereinafter referred to as blooms, are semifinished steel products, hot rolled or forged to approximate cross-sectional dimensions. Blooms may be square, round, hexagonal, octagonal, or rectangular in section. For the purposes of this specification, minimum bloom section size will be 16 in.² [103 cm²].

1.3This specification covers two basic classifications of steel:

1.3.1Class I—Vacuum-induction melted or consumable-electrode vacuum melted, or other suitable processes which will satisfy the quality requirements of this specification.

1.3.2Class II—Air-melted vacuum degassed.

1.3.3Class III—Air melted electric furnace ladle refined and vacuum degassed.

1.4The values stated in either inch-pound units or SI (metric) units are to be regarded separately as standard. Within the text and tables, 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.

1.5Unless the order specifies the applicable “M” specification the material shall be furnished to the inch-pound units.

1.6This 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.

Committee	A 01
DocumentType	Standard
Pages	5
PublisherName	American Society for Testing and Materials
Status	Current
Supersedes	ASTM A 646/A646M : 2017

ASTM E 45 : 2018 : REV A	Standard Test Methods for Determining the Inclusion Content of Steel
ASTM A 788/A788M : 2022	Standard Specification for Steel Forgings, General Requirements
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ASTM A 604/A604M : 2007 : R2022	Standard Practice for Macroetch Testing of Consumable Electrode Remelted Steel Bars and Billets
ASTM E 45 : 2018 : REV A : R2023	Standard Test Methods for Determining the Inclusion Content of Steel
ASTM E 381 : 2022	Standard Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings
ASTM A 388/A388M : 2023	Standard Practice for Ultrasonic Examination of Steel Forgings
ASTM A 788/A788M : 2022 : REV A	Standard Specification for Steel Forgings, General Requirements
ASTM E 381 : 2020	Standard Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings
ASTM A 388/A388M :2019	Standard Practice for Ultrasonic Examination of Steel Forgings