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ASTM A299 Grade B Boiler and pressure vessel steel plate

ASTM A299 Grade B Boiler and pressure vessel steel plate in 50 mm and below in thickness are normally supplied in the as-rolled state. Plates may be ordered normalized or stress relieved, or both. Plates over 50 mm in thickness shall be normalized.A299 / A299M Covers manganese, silicon carbon steel plates for welding boilers and other pressure vessels, steel grade A299 Class A and A299 Class B.ASTM A299 :Standard Specification for Pressure Vessel ASTM A299, Revision 79B, September 17, 1979 - Standard Specification for Pressure Vessel Plates, Carbon Steel, Manganese-Silicon This specification 2 covers manganese-silicon carbon steel plates for use in welded boilers and other pressure vessels. Plates under this specification are produced in one grade only; however, the yield strength decrease on thicknesses over 1 in. (25.4 mm);