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Standard Specification for Pressure Vessel Plates, Low-Carbon Age-Hardening Nickel-Copper-Chromium-Molybdenum-Columbium (Niobium) Alloy Steel
This specification covers two grades of low-carbon age-hardening alloy steel plates for welded pressure vessels and piping components.
The two grades are:
The heat treatment procedure for class 1, 2, 3 plates is presented.
The steel shall conform to the required chemical compositions.
Mechanical property requirements of the steel plates, including tension test requirements and notch-toughness requirements, are presented in detail.
1.1 This specification2 covers low-carbon age-hardening alloy steel plates for welded pressure vessels and piping components. The specification covers nickel-copper-chromium-molybdenum-columbium (niobium) steel.
1.2 Plates under this specification are available as follows:
1.3 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 in inch-pound units.
1.4 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 this specification.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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