ASTM A540/A540M-15 (R2021) pdf free download.Standard Specification for Alloy-Steel Bolting for Special Applications.
1 This specification covers regular and special-quality alloy steel bolting materials and bolting components that may
be used for nuclear and other special applications . See Specification A962 / A962M for the definition of boltin
1.2 The following referenced common requirements are indispensable for application of this specification : Specification A962/A962M.
1 . 3 Supplementary requirements of an optional nature are provided for use at the option of the purchaser . These supplementary requirements only apply when specified individually by the purchaser in the purchase order or contract
1.4 This specification is expressed in both inch-pound units and in SI units : however , unless the purchase order or contract specifies the applicable " M " specification designation ( SI units ) , inch-pound units shall apply .
1 . 5 The values stated in either SI units or inch-pound units are to be regarded separately as standard . Within the text , the SI units are shown in brackets . The values stated in each system may not be exact equivalents ; therefore , each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard
1.6 This international standard was developed in accordance with internationally recognized principles on standard.
5 . Manufacture
5.1 Bolting material shall be supplied hot-rolled or hot
forged or cold-finished at the option of the producer . However ,
if desired by the purchaser , cold finishing may be specified
6 . Heat Treatment
6.1 Bolting material ordered in the annealed condition shall have a structure suitable for machining . Such annealed material is not intended to be used without subsequent quenching and tempering as specified in 6.2
6.2 Bolting material ordered in the liquid-quenched and tempered condition shall be uniformly reheated from a tem
perature below the cooling transformation range to the proper austenitizing temperature , quenched in a liquid medium under substantially uniform conditions , and then uniformly reheated for tempering . The minimum tempering temperature shall be 850F
6.3 Bolting material that has been straightened after quenching and tempering shall be stress relieved by reheating to a temperature not lower than 100 F under the temperin temperature
7 . Chemical Composition
7.1 Steels used for bolting materials shall conform to the chemical requirements prescribed in Table I
8 . Tensile Requirements
8.1 Bolting material furnished in the annealed condition shall be capable of meeting the specified tensile properties for the class as specified in Table 2 when heat treated in accordance with 6.2 and 6.3 ( see Supplementary Requirement
8.2 Bolting material in the quenched and tempered or quenched , tempered and stress-relieved condition shall con
form to properties shown in Table 2 for the specified class.ASTM A540/A540M pdf download.