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Norm
ASTM A 320/A 320Ma
Issue date: 2007
Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service(2. revision 2007)
1.1 This specification covers alloy steel bolting materials for pressure vessels, valves, flanges, and fittings for low-temperature service. The term "bolting material" a...
Publisher:
American Society for Testing and Materials
Format:
Digital | 8 Pages
Language:
English
Currently valid:
1.1 This specification covers alloy steel bolting materials for pressure vessels, valves, flanges, and fittings for low-temperature service. The term "bolting material" as used in this specification covers rolled, forged, or strain hardened bars, bolts, screws, studs, and stud bolts. The bars shall be hot-wrought. The material 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 1The 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 Nuts for use with this bolting material ar ....(abbreviated)
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Norm
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Norm
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Norm
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Norm
ASTM A 320/A 320M
2008
Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Ser...
Norm
ASTM A 320/A 320Ma
2007
Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Ser...
Norm
↖
ASTM A 320/A 320M
2007
Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Ser...
Norm
ASTM A 320/A 320Ma
2005
Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Ser...
Norm
Norm
Issue date :
2008
Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service