This specification covers killed carbon- manganese-silicon steel plates intended for welded pressure vessels in service at moderate and lower temperatures. As a steel making practice, the steel shall be killed and shall conform to specified fine austenitic grain size requirements. Plates are normally supplied in the as-rolled condition. Plates may be ordered normalized or stress relieved, or both. The steel shall conform to the required chemical compositions. The plates, as represented by the tension test specimens, shall conform to the mechanical property requirements.
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1.1 This specification covers killed carbon-manganese-silicon steel plates intended for welded pressure vessels in service at moderate and lower temperatures.
1.2 The maximum thickness of plates supplied under this specification is 1 in. [25 mm].
1.3 For plates produced from coil and furnished without heat treatment or with stress relieving only, the additional requirements, including additional testing requirements and the reporting of additional test results, of Specification A20/A20M apply.
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 the specification.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A20/A20M Specification for General Requirements for Steel Plates for Pressure Vessels
A435/A435M Specification for Straight-Beam Ultrasonic Examination of Steel Plates
A577/A577M Specification for Ultrasonic Angle-Beam Examination of Steel Plates
A578/A578M Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications
carbon steel; steel plates for pressure vessels; lower temperature service; high strength steel plates;
ICS Number Code 77.140.30 (Steels for pressure purposes)
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