1.1 This specification covers normalized high-strength low-alloy structural steel plates for welded, riveted, or bolted construction.
1.2 This material is particularly suited for service at low ambient temperatures of −50°F [−45°C] and higher where notch toughness better than that expected in as-rolled material of a comparable strength level is desired.
1.3 Four grades, designated Grades8201;A, C, D, and8201;E (essentially former Specification A633 without a grade designation) are covered by this specification. Grade8201;A provides a minimum yield point of 428201;ksi [2908201;MPa] in thicknesses through 48201;in. [1008201;mm], inclusive. Grades8201;C and8201;D provide a minimum yield point of 508201;ksi [3458201;MPa] in thicknesses up to 2.508201;in. [658201;mm], inclusive and 46.08201;ksi [3158201;MPa] in thicknesses over 2.508201;in. to 4.08201;in. [65 to 1008201;mm], inclusive. Grade8201;E provides a minimum yield point of 608201;ksi [4158201;MPa] in thicknesses up to 4.08201;in. [1008201;mm], inclusive and 558201;ksi [3808201;MPa] in thicknesses over 48201;in. to 68201;in. [100 to 1508201;mm], inclusive.
1.4 Current practice normally limits plates furnished under this specification to the maximum thicknesses shown in 1.3. The individual manufacturer should be consulted on size limitations for other product forms.
1.5 When the steel is to be welded, it is presupposed that a welding procedure suitable for the grade of steel and intended use or service will be utilized. See Appendi舁X3 of Specification A6/A6M for information on weldability.
1.6 The values stated in either inch-pound units or SI units are to be regarded 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.
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