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  • ASTM
    A646/A646M-24 Standard Specification for Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings (Redline)
    Edition: 2024
    $103.58
    Unlimited Users per year

Description of ASTM-A646/A646M 2024

ASTM A646/A646M-24

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




ASTM A646/A646M

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.2 [103 cm2].

1.3 This specification covers three 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.

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

1.4 The 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.

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

1.6 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.


Keywords

aerospace application; alloy steels; consumable electrode remelted; electric furnace; ladle refined; premium quality; reforging stock; steel billets; steel blooms; vacuum degassed; vacuum melted;


ICS Code

ICS Number Code 49.025.10 (Steels)


DOI: 10.1520/A0646_A0646M-24

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About ASTM

ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.
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