ASTM_A_770_-_A_770M_-_03_2012e1.pdf

Designation:A770/A770M03(Reapproved 2012)1Standard Specification forThrough-Thickness Tension Testing of Steel Plates forSpecial Applications1This standard is issued under the fixed designation A770/A770M;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()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1NOTETable 2 was corrected editorially in October 2016.1.Scope1.1 This specification2covers the procedures and accep-tance standards for the determination of reduction of area usinga tension test specimen whose axis is perpendicular to therolled surfaces of steel plates 1 in.25 mm and greater inthickness.The principal purpose of the testing is to provide ameasure of the resistance of a steel plate to lamellar tearing.(See Appendix X1.)1.2 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 the specification.1.3 This specification is expressed in both inch-pound andSI units.However,unless the order specifies the applicable“M”specification designation(SI units),the material shall befurnished to inch-pound units.2.Referenced Documents2.1 ASTM Standards:3A370 Test Methods and Definitions for Mechanical Testingof Steel Products3.Ordering Information3.1 The inquiry and order shall include the following,ifrequired:3.1.1 Supplementary requirements that are available to meetend use requirements(see S1 through S5).3.1.2 Special requirements agreed upon between the manu-facturer and the purchaser.4.Tension Tests4.1 Number of Tests:4.1.1 Two tests shall be required from each plate-as-rolled,except for plates subjected to heat treatment by quenching andtempering.Two tests shall be required from each quenched-and-tempered plate.The tests shall be representative of theplate in its final condition.4.1.2 When plates are furnished by the manufacturer in anunheat-treated condition and qualified by heat-treated speci-mens(including normalized,normalized and tempered,andquenched and tempered),two tests shall be required from eachplate-as-rolled.NOTE1The term“plate-as-rolled”refers to the unit plate rolled froma slab or directly from an ingot.It does not refer to the condition of theplate.4.2 Location of Test CouponsTake one test coupon at eachend of each plate as defined in 4.1.Take the test coupons fromthe center of the plate width.4.3 Orientation of Test SpecimensThe longitudinal axis ofthe reduced section of the test specimens shall be perpendicularto the rolled surface of the plate.4.4 Preparation of Test Specimens:4.4.1 Welded ProlongationsWhen required,join weldedprolongations to the surface(s)of the plate being tested.Thejoining method used shall be one which results in a minimalheat-affected zone in the portion of the plate to be tested.Shielded metal arc,friction,stud,or electron-beam weldingmethods have proven to be suitable.4.4.2 Standard Test Specimens:4.4.2.1 Three types of standard round tension test specimensare shown in Fig.1 and Table 1.For Types 1 and 2 specimens,locate the center of the length of the reduced section at theapproximate mid-point of the plate thickness.For Type 31This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.11 on Steel Plates for Boilers and Pressure Vessels.Current edition approved March 1,2012.Published April 2012.Originallyapproved in 1980.Last previous edition approved in 2007 as A770/A770M 03(2007).DOI:10.1520/A0770_A0770M-03R12E01.2For ASME Boiler and Pressure Vessel Code applications,see related Specifi-cation SA-770/SA-770M in Section II of that Code.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 specimens,locate the weld fusion line of one plate surfacewithin14in.6 mm of one end of the reduced section.4.4.2.2 For plates from 1 in.25 mm to 114in.32 mminclusive in thickness,use either the 0.350-in.8.75-mm Type1 specimen or the 0.500-in.12.5-mm Type 2 specimen.4.4.2.3 For plates over 114in.to 2 in.50 mm inclusive inthickness,use the 0.500-in.12.5-mm Type 2 specimen.4.4.2.4 For plates greater than 2 in.50 mm in thickness,use the Type 3 specimen.4.4.3 Alternative Test SpecimensThe alternative testspecimens in Fig.2 and Table 2 may be used i