This specification covers four grades of carbon steel plates of structural quality for general application. Steel samples shall be melt processed by either open-hearth, basic-oxygen, or electric furnace. Heat and product analysis shall be performed wherein steel materials shall conform to required chemical compositions of carbon, manganese, phosphorus, sulfur, silicon, and copper. Steel specimens shall also undergo tensile tests and shall conform to required values of tensile strength, yield point, and elongation.

1.1 This specification covers four grades (A, B, C, and D) ofcarbon steel plates of structural quality for generalapplication.

1.2 When the steel is to be welded, a welding procedure suitablefor the grade of steel and intended use or service is to beutilized. See Appendix X3 of Specification A 6/A 6M for informationon weldability.

1.3 The values stated in either inch-pound units or SI units areto be regarded separately as standard. Within the text, the SIunits are shown in brackets. The values stated in each system arenot exactly equivalents; therefore, each system is to be usedindependently of the other, without combining values in anyway.

1.4 For plate produced from coil and furnished without heattreatment or with stress relieving only, the additionalrequirements, including additional testing requirements and thereporting of additional test results, of Specification A 6/A 6Mapply.

1.5 This specification contains notes or footnotes, or both,that provide explanatory material. Such notes and footnotes,excluding those in tables and figures, do not contain any mandatoryrequirements.