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About This Item
Full Description
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 Table 2 classes, and 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 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 Nuts for use with this bolting material are covered in Section 10 and the nut material shall be impact tested.
1.4 Supplementary Requirements (S1, S2, and S3) of an optional nature are provided. They shall apply only when specified in the inquiry, contract and order.
1.5 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable "M" specification designation (SI units), the material shall be furnished to inch-pound units.
1.6 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.
Document History
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ASTM A320/A320M-24
Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service- Most Recent
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ASTM A320/A320M-22a
Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service- Historical Version
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ASTM A320/A320M-22
Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service- Historical Version
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ASTM A320/A320M-21a
Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service- Historical Version
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ASTM A320/A320M-21
Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service- Historical Version
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ASTM A320/A320M-18
Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service- Historical Version
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ASTM A320/A320M-17b
Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service- Historical Version
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ASTM A320/A320M-17a
Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service- Historical Version
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ASTM A320/A320M-17
Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service- Historical Version
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ASTM A320/A320M-15a
Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service- Historical Version
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ASTM A320/A320M-15
Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service- Historical Version
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ASTM A320/A320M-14
Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service- Historical Version
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ASTM A320/A320M-11a
Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service- Historical Version
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ASTM A320/A320M-11
Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service- Historical Version
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ASTM A320/A320M-10a
Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service- Historical Version
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ASTM A320/A320M-10
Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service- Historical Version
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ASTM A320/A320M-08
Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service- Historical Version
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ASTM A320/A320M-07a
Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service- Historical Version
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ASTM A320/A320M-07
viewing
Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service- Historical Version
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ASTM A320/A320M-05a
Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service- Historical Version
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ASTM A320/A320M-05
Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service- Historical Version
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ASTM A320/A320M-04
Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service- Historical Version
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ASTM A320/A320M-03
Standard Specification for Alloy-Steel Bolting Materials for Low-Temperature Service- Historical Version
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ASTM A320/A320M-02
Standard Specification for Alloy/Steel Bolting Materials for Low-Temperature Service- Historical Version
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ASTM A320/A320M-01
Standard Specification for Alloy/Steel Bolting Materials for Low-Temperature Service- Historical Version
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ASTM A320/A320M-00b
Standard Specification for Alloy/Steel Bolting Materials for Low-Temperature Service- Historical Version
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ASTM A320/A320M-97
Standard Specification for Alloy/Steel Bolting Materials for Low-Temperature Service- Historical Version