ASTM-A573

Designation:A 573/A 573M-05NTERNATIONALStandard Specification forStructural Carbon Steel Plates of Improved Toughness1This standard is issued under the fixed designation A 573/A 573M:the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapprovalA superscript epsilon (e)indicates an editorial change since the last revision or reapproval.1.ScopeTABLE 1 Chemical Requirements (Heat Analysis)1.1 This specification covers structural quality carbon-Composition,%manganese-silicon steel plates in three tensile strength rangesGrade 58Grade 65Grade 70intended primarily for service at atmospheric temperatures400][450[485)where improved notch toughness is important.Carbon,max:%in.[13 mml and under 0.230240.271.2 Plates covered by this specification are limited to aOver in.[13 mm]to 110.230260.28maximum thickness of 1.5 in.[40 mm].in.1.3 If the steel is to be welded,it is presupposed that a【40mm]inc0.60-0.90085-1.200.85-120welding procedure suitable for the grade of steel and intendedManganese4Phosphorus,max0.0350.0350.035use or service will be utilized.See Appendix X 3 of Specifi-Sulfur,max0.040.040.04cation A 6/A 6M for information on weldability.Silicon0.10-0.350.15-0.400.15-0401.4 The values stated in either inch-pound units or SI unitsA For each reduction of.01 percentage point below the specified maximum forare to be regarded separately as standard.Within the text,thecarbon,an increase of 0.06 percentage points above the specified maximum formanganese is permitted,up to a maximum of 1.50 for Grades 58 and 65;andSI units are shown in brackets.The values stated in eachup to a maximum of 1.60 for Grade 70.system are not exact equivalents;therefore,each system is tobe used independently of the other without combining values in5.Chemical Compositionany way.5.1 The heat analysis shall conform to the requirementsgiven in Table 1.2.Referenced Documents5.2 The product analysis shall conform to the requirements2.1 ASTM Standards:2given in Table 1 subject to the product analysis tolerances inA 6/A 6M Specification for General Requirements forSpecification A 6/A 6M.Rolled Structural Steel Bars,Plates,Shapes,and SheetPiling6.Tension Test6.1 The plates,as represented by the tension test specimens,3.General Requirements for Deliveryshall conform to the tensile requirements given in Table 2.3.1 Plates furnished under this specification shall conformto the requirements of the current edition of Specification7.KeywordsA 6/A 6M,unless a conflict exists in which case this specifi-7.1 carbon steel;plates;structural steel;toughness;weldedcation shall prevail.construction4.Materials and ManufactureTABLE 2 Tensile Requirements4.1 The steel shall be made to fine grain practice.Grade 58Grade 65Grada 70I400450][485]Tensile strength,ksi58-7165-7770-90[MPal【400-490450-53011485-620]Yield point,min,ksi323542[MPa]12201240][290]Elongation in 8 in.[2