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Full Description

1.1 This specification covers alloy steel bolting for pressure vessels, valves, flanges, and fittings for low-temperature service. See Specification for the definition of bolting. The bars shall be hot-wrought and may be further processed by centerless grinding or by cold drawing. Austenitic stainless steel may be solution annealed or annealed and strain-hardened. When strain hardened austenitic stainless steel is ordered, the purchaser should take special care to ensure that Appendix X1 is thoroughly understood.

1.2 Several grades are covered, including both ferritic and austenitic steels designated L7, B8, etc. Selection will depend on design, service conditions, mechanical properties, and low-temperature characteristics. The mechanical requirements of Table 1 indicate the diameters for which the minimum mechanical properties apply to the various grades and classes, and Table 2 stipulates the requirements for Charpy impact energy absorption. The manufacturer should determine that the material can conform to these requirements before parts are manufactured. For example, when Grade L43 is specified to meet the Table 2 impact energy values at 150 °F [101 °C], additional restrictions (such as procuring a steel with lower P and S contents than might normally be supplied) in the chemical composition for AISI 4340 are likely to be required.

Note 1 - The committee formulating this specification has included several grades of material that have been rather extensively used for the present purpose. Other compositions will be considered for inclusion by the committee from time to time as the need becomes apparent. Users should note that hardenability of some of the grades mentioned may restrict the maximum size at which the required mechanical properties are obtainable.

1.3 The following referenced general requirements are indispensable for application of this specification: Specification .

1.4 Nuts for use with bolting are covered in Section 10 and the nut material shall be impact tested.

1.5 Supplementary Requirements are provided for use at the option of the purchaser. The supplementary requirements shall apply only when specified in the purchase order or contract.

 

Document History

  1. ASTM A320/A320M-18


    Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service

    • Most Recent
  2. ASTM A320/A320M-17b


    Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service

    • Historical Version
  3. ASTM A320/A320M-17a


    Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service

    • Historical Version
  4. ASTM A320/A320M-17


    Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service

    • Historical Version
  5. ASTM A320/A320M-15a


    Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service

    • Historical Version
  6. ASTM A320/A320M-15


    Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service

    • Historical Version
  7. ASTM A320/A320M-14


    Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service

    • Historical Version
  8. ASTM A320/A320M-11a


    Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service

    • Historical Version
  9. ASTM A320/A320M-11

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    Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service

    • Historical Version
  10. ASTM A320/A320M-10a


    Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service

    • Historical Version
  11. ASTM A320/A320M-10


    Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service

    • Historical Version
  12. ASTM A320/A320M-08


    Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service

    • Historical Version
  13. ASTM A320/A320M-07a


    Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service

    • Historical Version
  14. ASTM A320/A320M-07


    Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service

    • Historical Version
  15. ASTM A320/A320M-05a


    Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service

    • Historical Version
  16. ASTM A320/A320M-05


    Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service

    • Historical Version
  17. ASTM A320/A320M-04


    Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service

    • Historical Version
  18. ASTM A320/A320M-03


    Standard Specification for Alloy-Steel Bolting Materials for Low-Temperature Service

    • Historical Version
  19. ASTM A320/A320M-02


    Standard Specification for Alloy/Steel Bolting Materials for Low-Temperature Service

    • Historical Version
  20. ASTM A320/A320M-01


    Standard Specification for Alloy/Steel Bolting Materials for Low-Temperature Service

    • Historical Version
  21. ASTM A320/A320M-00b


    Standard Specification for Alloy/Steel Bolting Materials for Low-Temperature Service

    • Historical Version
  22. ASTM A320/A320M-97


    Standard Specification for Alloy/Steel Bolting Materials for Low-Temperature Service

    • Historical Version