ASTM_A_808_-_A_808M_-_00a.pdf

Designation:A 808/A 808M 00aStandard Specification forHigh-Strength,Low-Alloy Carbon,Manganese,Columbium,Vanadium Steel of Structural Quality with Improved NotchToughness1This standard is issued under the fixed designationA808/A808M;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 reapproval.A superscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers hot-rolled,high-strength low-alloy steel plate with improved notch toughness in the as-rolledcondition.1.2 The maximum thickness available is 212in.65 mm.1.3 When the steel is to be welded,it is presupposed that awelding procedure suitable for the grade of steel and intendeduse or service will be utilized.See Appendix X3 of Specifica-tion A 6/A 6M for information on weldability.1.4 The values stated in either inch-pound units or SI unitsare to be regarded as standard.Within the text,the SI units areshown in brackets.The values stated in each system are notexact equivalents.Therefore,each system must be used inde-pendently of the other.Combining values from the two systemsmay result in nonconformance with this specification.2.Referenced Documents2.1 ASTM Standards:A 6/A6M Specification for General Requirements forRolled Structural Steel Bars,Plates,Shapes,and SheetPiling2A 673/A673M Specification for Sampling Procedure forImpact Testing of Structural Steel23.General Requirements for Delivery3.1 Material furnished under this specification shall con-form to the requirements of the current edition of SpecificationA 6/A 6M,for the ordered material,unless a conflict exists inwhich case this specification shall prevail.4.Materials and Manufacture4.1 The steel shall be made to fine grain practice.5.Chemical Composition5.1 The heat analysis shall conform to the requirementsshown in Table 1.5.2 The steel shall conform on product analysis to therequirements prescribed in Table 1 subject to the productanalysis tolerances in Specification A 6/A 6M.TABLE 1Chemical RequirementsElementsComposition,%Carbon0.12 maxManganese1.65 maxPhosphorous0.035 maxSulfurA0.04 maxSilicon0.15 to 0.50ColumbiumB0.02 to 0.10VanadiumB0.10 maxColumbium plus VanadiumB0.15 maxAMay also be produced restricted sulfur 0.010 maximum.BEither columbium,or vanadium,or columbium plus vanadium may be used tothe limits shown in this table.6.Mechanical Properties6.1 Tensile Properties:6.1.1 The material as represented by the test specimens shallconform to the tensile properties given in Table 2.TABLE 2Tensile RequirementsAThickness,in.mmMinimum YieldPoint,ksi MPaTensileStrength,min,ksi MPaElongation,%minB2 in.50 mm8 in.200 mmUp to 11240,incl50 34565 450C2218Over 112to 240 to 50,incl46 31565 4502218Over 2 to 21250 to 65,incl42 29060 4152218ASee Orientation under the Tension Tests section of Specification A 6/A 6M.BFor plates wider than 24 in.600 mm,the elongation requirement is reducedtwo percentage points.See elongation requirement adjustments in the TensionTests section of Specification A 6/A 6M.CPrior to A 808/A 808M 86,the minimum tensile strength was 70 ksi 485MPa.6.2 Charpy V-Notch Impact Properties:1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel,and Related Alloys and is the direct responsibility of SubcommitteeA01.02 on Structural Steel for Bridges,Buildings,Rolling Stock,and Ships.Current edition approved Sept.10,2000.Published October 2000.Originallypublished as A 808 82.Last previous edition A 808/A 808M 00.2Annual Book of ASTM Standards,Vol 01.04.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.6.2.1 The Charpy V-Notch impact tests shall be conductedin accordance with Specification A 673/A 673M.6.2.2 The frequency of testing(see Specification A 673/A 673M),the impact test temperature,and the absorbed energyrequirement shall be as agreed upon between purchaser andmanufacturer.The highest guaranteed absorbed energy and thelowest temperature normally available are shown in Table 3.7.Keywords7.1 carbon;columbium;high-strength;low-alloy;manga-nese;notch toughness;plate;steel;structural steel;vanadiumSUPPLEMENTARY REQUIREMENTSSupplementary requirements shall not apply unless specified in the purchase order or contract.Standardized supplelmentary requirements for use at the option of the purchaser are listed inSpecification A 6/A 6M.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.Users of this standard are expressly advised that determination of the validity of any such patent rights,and the riskof infringement of such rights,are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revi