ASTM-A646 › Standard Specification for Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings
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Scope
1.1 This specification covers premium quality alloy steel semifinished rolled or forged blooms and billets for reforging into critical parts such as aircraft landing-gear forgings.
1.2 Blooms 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. (103 cm ).
1.3 This specification covers two basic classifications of steel:
1.3.1 Class I -Vacuum-induction melted or consumable-electrode vacuum melted, or other suitable processes which will satisfy the quality requirements of this specification.
1.3.2 Class II -Air-melted vacuum degassed.
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
Keywords
Aerospace applications; Steel billets and blooms; Steel forgings; Steel forgings-alloy steel; premium quality alloy steel blooms/billets (for aircraft/aerospace; forgings), spec; ICS Number Code 49.025.10 (Steels)
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Document Number
ASTM-A0646_A0646M-17R22
Revision Level
2017 R22 EDITION
Status
Current
Modification Type
Reapproval
Publication Date
March 7, 2022
Document Type
Specification
Page Count
5 pages
Committee Number
A01.06