1、Designation: A673/A673M 17 American Association State Highwayand Transportation OfficialsStandard AASHTO No.: T 243Standard Specification forSampling Procedure for Impact Testing of Structural Steel1This standard is issued under the fixed designation A673/A673M; the number immediately following the
2、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 us
3、e by agencies of the U.S. Department of Defense.1. Scope*1.1 This specification covers the procedure for CharpyV-notch testing of structural steel and contains two frequenciesof testing. The impact properties of steel can vary within thesame heat and piece, be it as-rolled, control-rolled, or heattr
4、eated. The purchaser should, therefore, be aware that testingof one plate, bar, or shape does not provide assurance all plates,bars, or shapes of the same heat as processed will be identicalin toughness with the product tested. Normalizing or quench-ing and tempering the product will reduce the degr
5、ee ofvariation.1.2 This specification is intended to supplement specifica-tions for structural steel when so specified.1.3 This specification does not necessarily apply to allproduct specifications; therefore, the manufacturer or processorshould be consulted for energy absorption levels and minimumt
6、esting temperatures that can be expected or supplied.1.4 Two frequencies of testing (P and H) are prescribed.1.5 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 e
7、quivalents; therefore, each system must be used inde-pendently of the other. Combining values from the two systemsmay result in nonconformance with this specification.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization establish
8、ed in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A6/A6M Specification for General Requirements for RolledStructural
9、Steel Bars, Plates, Shapes, and Sheet PilingA370 Test Methods and Definitions for Mechanical Testingof Steel Products3. Ordering Information3.1 The inquiry and order shall indicate the following:3.1.1 Frequency of testing, (P) or (H),3.1.2 Test temperature (see 4.5 and 4.6),3.1.3 Minimum average abs
10、orbed energy value (see 4.1 and4.6),3.1.4 Transverse impact test orientation for plate widthsover 24 in. 600 mm, if desired (see 4.2.2),3.1.5 Alternate core location (see 4.3), if applicable, and3.1.6 Condition (as-rolled, stress relieved, normalized, nor-malized and stress relieved, or quenched and
11、 tempered).4. Tests4.1 Impact testing shall be in accordance with Test Methodsand Definitions A370. An impact test shall consist of testingthree specimens taken from a single test coupon or testlocation, the average result of which shall be not less than theminimum average absorbed energy specified
12、in the purchaseorder, which in no case shall be less than 7 ftlbf 10 J for fullsize specimens.4.2 Except as allowed by 4.3, specimens for plates and barsshall be taken from a location adjacent to the location specifiedfor the tension test specimen, and specimens for shapes shall betaken from a locat
13、ion at an end of the shape at a point one thirdthe distance from the outer edge of the flange or leg to the webor heel of the shape (see Fig. 1 and Fig. 2). For plates producedfrom coils, three impact tests shall be taken from the product ofeach coil or qualifying coil (see Section 5); one test coup
14、onshall be obtained from a location adjacent to the location1This 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.Curre
15、nt edition approved Nov. 15, 2017. Published November 2017. Originallyapproved in 1972. Last previous edition approved in 2012 as A673/A673M 07(2012). DOI: 10.1520/A0673_A0673M-17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org
16、. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThi
17、s international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (T
18、BT) Committee.1specified for each of the two required tension tests (seeSpecification A6/A6M) and the third test coupon shall beobtained from a location immediately after the last plateproduced to the qualifying specification. If, during decoiling ofeach coil or qualifying coil, the amount of materi
19、al decoiled isless than that required to reach the approximate center lap,additional test coupons for impact tests shall be obtainedadjacent to the location for the additional required tension tests(see Specification A6/A6M) corresponding to the end of theinnermost portion decoiled until the approxi
20、mate center lap ofthe coil is reached for which a test coupon for impact test shallbe obtained. Upon further decoiling beyond the approximatecenter lap, additional test coupons for impact tests shall beobtained from locations immediately after the last plate pro-duced to the qualifying specification
21、 during the decoilingoperation.4.2.1 Except as allowed by 4.2.2, the longitudinal axis ofeach specimen shall be parallel to the final direction of rollingof the plate or parallel to the major axis of the shape.4.2.2 If specified in the purchase order, for plate widths over24 in. 600 mm, the longitud
22、inal axis of each specimen shallbe transverse to the final direction of rolling of the plate.4.2.3 The longitudinal axis of each specimen shall belocated midway between the surface and the center of theproduct thickness, and the length of the notch shall beperpendicular to the rolled surface of the
23、product.NOTE 1LT (Longitudinal tensile test) For widths through 24 in. 600 mm, may be taken at any location, A through H.NOTE 2TT (Transverse tensile test) For widths over 24 in. 600 mm, may be taken at location B, C, F,orG.NOTE 3CIL (Charpy impact longitudinal) May be taken at any location, A throu
24、gh H.NOTE 4CIT (Charpy impact transverse) For widths over 24 in. 600 mm, may be taken at location B, C, F,orG.FIG. 1 Plate Test LocationNOTE 1CIL = Charpy impact longitudinal.NOTE 2Test coupon for impact specimens may be taken from locations A, B, C,orD as shown laid out at location A.FIG. 2 Shape T
25、est LocationA673/A673M 1724.3 For shapes with a flange thickness equal to or greaterthan 112 in. 38.1 mm, where alternate core location testing isspecified in the purchase order, the longitudinal axis of eachspecimen shall be located midway between the inner flangesurface and the center of the flang
26、e thickness at the intersectionwith the web mid-thickness (see Fig. 3).4.4 The absorbed energy values obtained for subsize speci-mens shall not be less than the applicable values given in Table1, which are proportional to the absorbed energy valuesrequired for full-size specimens.4.5 Except as allow
27、ed by 4.6, the test temperature shall beas specified in the purchase order.4.6 The manufacturer or processor shall have the option ofusing a lower test temperature than is specified in the purchaseorder, provided that the absorbed energy values specified in thepurchase order are met.4.7 The actual t
28、est temperature used shall be reported withthe test results.5. Frequency of Testing5.1 Frequency (H) Heat Testing for Plates, Shapes, andBarsOne impact test (a set of three specimens) shall be madefor each 50 tons 45 Mg of the same type of product subjectto the requirements of this specification pro
29、duced on the samemill from the same heat of steel. When multiple impact testsare required, the impact test(s) shall be taken from differentas-rolled or heat-treated pieces. Impact specimens shall beselected from the thickest material rolled subject to thefollowing modifications: When material rolled
30、 up to 2 in. 50mm inclusive in thickness differs38 in. 10 mm or more inthickness, one impact test shall be made from both the thickestand thinnest material rolled. When material rolled over 2 in.50 mm in thickness differs 1 in. 25 mm or more inthickness, one impact test shall be made from both the t
31、hickestand thinnest material rolled that is more than 2 in. 50 mm inthickness. If insufficient pieces of the thickest or thinnestmaterial are produced to permit compliance with the above,then testing may proceed to the next nearest thickness avail-able. When plates are produced from coils, a minimum
32、 of threeimpact tests shall be taken from each qualifying coil (see 4.2).One such coil shall be tested for each 50 tons 45 Mg of thesame product produced on the same mill from the same heat ofsteel. When material from one heat differs116 in. 2 mm ormore in thickness, tests shall be made from both th
33、e thickestand thinnest material rolled regardless of the number of coilsrepresented.5.2 Frequency (P) Piece Testing:5.2.1 PlatesOne Charpy V-notch impact test (a set ofthree specimens) shall be made from each plate-as-rolledexcept for material that has been heat treated by quenching andtempering, in
34、 which case specimens shall be selected fromeach heat-treated plate. When plates are produced from coils,three impact tests shall be taken from each coil.5.2.2 ShapesOne Charpy V-notch impact test (a set ofthree specimens) shall be made from at least each 15 tons 15Mg or each single length of 15 ton
35、s 15 Mg or more, of thesame nominal shape size, excluding length, from each heat inthe as-rolled condition. If the shapes are heat treated, one testshall be taken from each heat of each furnace lot. For shapesheat treated in a continuous furnace, a lot shall not exceed 15tons 15 Mg.5.2.3 BarsOne Cha
36、rpy V-notch impact test (a set of threespecimens) shall be made for each 5 tons 5 Mg of the sameheat and same diameter or thickness if the material is furnishedas-rolled or is heat treated in a continuous-type furnace. Formaterial heat treated in a noncontinuous furnace, one test shallbe taken from
37、each heat of the same bar diameter or thicknessfor each furnace charge.6. Heat Treatment6.1 The material shall be heat treated when specified on thepurchase order.6.2 When the structural products are to be supplied in theas-rolled condition the manufacturer or processor (see Speci-fication A6/A6M) h
38、as the option to heat treat the structuralproducts by normalizing or stress relieving or normalizing andstress relieving to meet the desired toughness properties.6.3 When the fabricator elects to perform the required heattreatment or fabricates by hot forming instead of heat treating,the structural
39、products shall be accepted on the basis of testsmade on full-thickness specimens heat treated in accordancewith the purchasers order requirements. If the heat treatmenttemperatures are not indicated on the purchase order, themanufacturer or processor shall heat treat the specimens underNOTE 1The not
40、ch for any of the specimens can be on either side of the beam centerline.FIG. 3 Alternate Core Location for CVN SpecimensA673/A673M 173conditions considered appropriate for grain refinement and tomeet the toughness requirements. The plate manufacturer orprocessor shall inform the purchaser of the pr
41、ocedure followedin treating the specimens.7. Retests7.1 If more than one individual test value is below thespecified minimum average value, or if an individual test valueis below the greater of 5 ftlbf 7 J and two thirds of thespecified minimum average value, a retest of three additionalspecimens sh
42、all be made, and each individual test value forsuch retest shall be equal to or greater than the specifiedminimum average value.7.2 If the required energy values are not obtained uponretest, the material may at the option of the manufacturer orprocessor be heat treated in the case of as-rolled mater
43、ial orreheat treated in the case of heat-treated material.7.3 After heat treatment or reheat treatment a set of threespecimens shall be tested and qualified in the same manner forthe original material.7.4 If the impact test fails for the thickest product testedwhen testing to frequency (H) that mate
44、rial shall be rejectedand the next thickest material tested to qualify the heat inaccordance with 4.1. At the option of the manufacturer orprocessor retests may be made on the rejected material inwhich case each piece shall be accepted or rejected on the basisof the results of its own test.8. Test R
45、eports8.1 Test reports for each heat supplied are required whenrequired by the product specification, the applicable supple-mentary requirements, or specified by the purchase order.8.1.1 Test reports shall show the results of each test requiredby the specification. However, for (H) frequency, only o
46、ne testneed be reported when the amount of material from a shipmentis less than 50 tons 45 Mg or two tests when the amount ofmaterial from a shipment is 50 tons 45 Mg or more.8.1.2 The thickness of the product tested may not necessar-ily be the same as an individual ordered thickness when (H)heat te
47、sting is ordered. Tests from material thicknesses inaccordance with 5.1 and encompassing the thicknesses in ashipment shall be sufficient for qualifying the material in theshipment. These test thicknesses may or may not be withinpreviously tested and shipped thicknesses from the same heat.8.1.3 For
48、plates produced from coils, all three test resultsshall be reported for each qualifying coil. If only half or less ofa coil is utilized, then only one test from the outer lap and onefrom the innermost portion shipped need be reported.8.1.4 For plates produced from coils, both the manufacturerand pro
49、cessor shall be identified on the test report.8.1.5 Asignature is not required on the test report. However,the document shall clearly identify the organization submittingthe report. Notwithstanding the absence of a signature, theorganization submitting the report is responsible for the contentof the report.8.1.6 When finished material is supplied to a purchase orderspecifying ASTM A673/A673M, the organization supplyingthat material shall provide the purchaser with a copy of theoriginal manufacturers test
