ASTM A540-15(R2021) pdf free download

ASTM A540-15(R2021) pdf free download.Standard Specification for Alloy-Steel Bolting for Special Applications
1. Scope
1.1 This specification 2 covers regular and special-quality alloy steel bolting materials and bolting components that may be used for nuclear and other special applications. See Speci- fication A962/A962M for the definition of bolting. 1.2 The following referenced common requirements are indispensable for application ofthis specification: Specification A962/A962M. 1.3 Supplementary requirements of an optional nature are provided for use at the option of the purchaser. These supple- mentary 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 accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Ordering Information
3.1 The inquiry and orders for bolting material and bolting components under this specification shall include the following, as required, to describe the desired items ad- equately: 3.1.1 Grade and Class 3.1.2 Condition (Section 5), 3.1.3 Heat treatment (Section 6), 3.1.4 Supplementary Requirements (S1 to S9), 3.1.5 Reports required (Section 16), 3.1.6 End use, and 3.1.7 Any special requirements. 3.2 The purchaser is referred to the listed supplementary requirements.
4. Common Requirements
4.1 Bolting materials and bolting components supplied to this specification shall conform to the requirements of Speci- fication A962/A962M. These requirements include test methods, finish, thread dimensions, macro etch, marking, certification, optional supplementary requirements, and others. Failure to comply with the requirements of Specification A962/A962M constitutes nonconformance with this specifica- tion. In case of conflict between this specification and Speci- fication A962/A962M, this specification shall prevail.
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 850 °F [455 °C]. 6.3 Bolting material that has been straightened after quench- ing and tempering shall be stress relieved by reheating to a temperature not lower than 100 °F [55 °C] under the tempering temperature.
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 accor- dance with 6.2 and 6.3 (see Supplementary Requirement S4). 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.
9. Hardness Requirements
9.1 The hardness shall be determined on the surface of the material after removal of decarburization. 9.2 The hardness of bolting material in the annealed condi- tion shall not be greater than 235 HBW. 9.3 The hardness of bolting material in the quenched and tempered or quenched, tempered and stress-relieved condition shall be within the limits in Table 2 for the specified class.
10. Impact Requirements
10.1 Annealed bolting material after proper heat treatment shall be capable of meeting the impact requirements in Table 2 or of Supplementary Requirement S8, if so specified (see Supplementary Requirement S4). 10.2 Bolting material in the quenched and tempered or quenched, tempered, and stress-relieved condition shall con- form to the impact requirements in Table 2, or of Supplemen- tary Requirement S8 if so specified. 10.3 The percent ofshear (ductility or fibrous) fracture shall be computed. The computed value shall be recorded for all impact specimens. 10.4 The amount of lateral expansion shall be measured. The measured value shall be recorded for all impact specimens. 10.5 The percent shear and the amount of lateral expansion shall be reported for information purposes (see 16.1).