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Full Description

1.1 This specification covers untreated and heat-treated carbon and alloy steel forgings for general industrial use. Other ASTM specifications for forgings are available for specific applications such as pressure vessels, railroad use, turbine generators, gearing, and others involving special temperature requirements.

1.2 Hot-rolled or cold finished bars are not within the scope of this specification.

1.3 Six classes of carbon steel and seven classes of alloy steel forgings are listed (see Section 7), which indicates their required heat treatments, as well as mechanical properties.

1.4 Provision, with the suffix H for certification and marking, for the supply of forgings after hardness testing only.

1.5 Supplementary requirements, including those in Specification A788/A788M, of an optional nature are provided. These shall apply only when specified by the purchaser.

1.6 Appendix X1 lists the current classes corresponding to the various classes of Specifications A235, A237, and A243, which have been superseded by this specification.

1.7 The values stated in either SI units or inch-pound 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.

1.8 Unless the order specifies the applicable “M” specification, the forgings shall be furnished to the inch-pound units.

1.9 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.

 

Document History

  1. ASTM A668/A668M-20a

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    Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use

    • Most Recent
  2. ASTM A668/A668M-20


    Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use

    • Historical Version
  3. ASTM A668/A668M-19a


    Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use

    • Historical Version
  4. ASTM A668/A668M-19


    Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use

    • Historical Version
  5. ASTM A668/A668M-17


    Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use

    • Historical Version
  6. ASTM A668/A668M-16


    Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use

    • Historical Version
  7. ASTM A668/A668M-15


    Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use

    • Historical Version
  8. ASTM A668/A668M-14


    Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use

    • Historical Version
  9. ASTM A668/A668M-13e1


    Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use

    • Historical Version
  10. ASTM A668/A668M-13


    Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use

    • Historical Version
  11. ASTM A668/A668M-04(2009)


    Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use

    • Historical Version
  12. ASTM A668/A668M-04


    Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use

    • Historical Version
  13. ASTM A668/A668M-03


    Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use

    • Historical Version
  14. ASTM A668/A668M-02


    Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use

    • Historical Version
  15. ASTM A668/A668M-96(2001)


    Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use

    • Historical Version
  16. ASTM A668/A668M-96e1


    Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use

    • Historical Version