ASTM A543-09(R2021) pdf free download

ASTM A543-09(R2021) pdf free download.Standard Specification for Pressure Vessel Plates, Alloy Steel, Quenched and Tempered Nickel-Chromium-Molybdenum
1. Scope
1.1 This specification 2 covers nickel-chromium- molybdenum alloy steel plates for use in the quenched and tempered condition, intended for the fabrication of welded pressure vessels and other pressure equipment. These alloy compositions are normally considered for construction involv- ing plate thicknesses of 2 in. [50 mm] or greater. 1.2 Material under this specification is available in two types, B and C. The material is also available in three classes as follows:1.3 The maximum thickness of plates is limited only by the capacity of the chemical composition to meet the specified mechanical property requirements. 1.4 The minimum plate thickness is 3 ⁄ 16 in. [5 mm]. 1.5 These alloy steel plates in the as-rolled condition are sensitive to cracking during flame cutting, transit, and han- dling. They should be shipped in the as-rolled condition only with the mutual agreement of the manufacturer and the purchaser or fabricator. 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 necessarily 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 specification. 1.7 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. General Requirements and Ordering Information
3.1 Material supplied to this material specification shall conform to Specification A20/A20M. These requirements out- line the testing and retesting methods and procedures, permit- ted variations in dimensions, and mass, quality and repair of defects, marking, loading, and ordering information. 3.2 In addition to the basic requirements of this specification, certain supplementary requirements are available when additional control, testing, or examination is required to meet end use requirements. The purchaser is referred to the listed supplementary requirements in this specification and to the detailed requirements in Specification A20/A20M. 3.3 If the requirements of this specification are in conflict with the requirements ofSpecification A20/A20M, the require- ments of this specification shall prevail.
5. Heat Treatment
5.1 All plates shall be heat treated by heating to a suitable austenitizing temperature, holding for a sufficient time period to attain uniform temperature through the thickness and quenching in a suitable liquid medium by spraying or immer- sion. The plates shall then be tempered to produce the required properties by heating to a suitable temperature not lower than 1100°F [595°C] with a holding time of not less than 1 ⁄ 2 h ⁄in. [1.2 min/mm] of thickness but not less than 1 ⁄ 2 h. 5.2 Plates over 4 in. [100 mm] in thickness shall receive a prior treatment of normalizing at, or water quenching from a temperature within the range from 1650 to 1850°F [900 to 1010°C] before the heat treatment specified in 5.1. 5.3 When the fabricator elects to perform the heat treatment in 5.1 and 5.2, the manufacturer shall normalize the plates at an appropriate temperature prior to shipment unless otherwise agreed to.
7. Mechanical Requirements
7.1 Tension Test Requirements: 7.1.1 The material as represented by the tension-test speci- mens shall conform to the requirements shown in Table 2. 7.1.2 For nominal plate thicknesses of 3 ⁄ 4 in. [20 mm] and under, the 1 1 ⁄ 2 -in. [40-mm] wide rectangular specimen may be used for the tension test and the elongation may be determined in a 2-in. [50-mm] gauge length that includes the fracture and shows the greatest elongation.