1、Designation: A673/A673M 07 (Reapproved 2012)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 immediate
2、ly 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 bee
3、n approved for use by agencies of the Department of Defense.1. Scope1.1 This specification covers the procedure for longitudinalCharpy V-notch testing of structural steel and contains twofrequencies of testing. The impact properties of steel can varywithin the same heat and piece, be it as rolled, c
4、ontrol rolled,or heat treated. The purchaser should, therefore, be aware thattesting of one plate, bar, or shape does not provide assuranceall plates, bars, or shapes of the same heat as processed will beidentical in toughness with the product tested. Normalizing orquenching and tempering the produc
5、t will reduce the degree 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 absorpti
6、on levels and minimumtesting 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
7、 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:2A6/A6M Specification for General Requirements for RolledStructural S
8、teel 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 abso
9、rbed 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
10、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 i
11、n 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 locati
12、on 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 coupo
13、nshall be obtained from a location adjacent to the locationspecified 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.4.2.1 Except as allowed by 4.2
14、.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.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of Sub
15、committeeA01.02 on Structural Steel for Bridges, Buildings, Rolling Stock and Ships.Current edition approved March 1, 2012. Published April 2012. Originallyapproved in 1972. Last previous edition approved in 2007 as A673/A673M 07.DOI: 10.1520/A0673_A0673M-07R12.2For referenced ASTM standards, visit
16、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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959
17、, United States.4.2.2 If specified in the purchase order, for plate widths over24 in. 600 mm, the longitudinal 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 cente
18、r of theproduct thickness, and the length of the notch shall beperpendicular to the rolled surface of the product.4.3 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 eachspec
19、imen shall be located midway between the inner flangesurface and the center of the flange 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 propor
20、tional to the absorbed energy valuesrequired for full-size specimens.4.5 Except as allowed by 4.6, the test temperature shall beas specified in the purchase order.4.6 The manufacturer shall have the option of using a lowertest temperature than is specified in the purchase order,provided that the abs
21、orbed energy values specified in thepurchase order are met.4.7 The actual test 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 th
22、e same type of product subjectNOTE 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
23、 any location, A through 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 loc
24、ation A.FIG. 2 Shape Test LocationA673/A673M 07 (2012)2to the requirements of this specification produced on the samemill from the same heat of steel. The impact test(s) shall betaken from different as-rolled or heat-treated pieces. Impactspecimens shall be selected from the thickest material rolled
25、subject to the following modifications: When material rolled upto 2 in. 50 mm inclusive in thickness differs38 in. 10 mmor more in thickness, one impact test shall be made from boththe thickest and thinnest material rolled. When material rolledover 2 in. 50 mm in thickness differs 1 in. 25 mm or mor
26、ein thickness, one impact test shall be made from both thethickest and thinnest material rolled that is more than 2 in. 50mm in thickness. If insufficient pieces of the thickest orthinnest material are produced to permit compliance with theabove, then testing may proceed to the next nearest thicknes
27、savailable. When plates are produced from coils, three impacttests shall be taken from each qualifying coil (see 4.2). Onesuch coil shall be tested for each 50 tons 45 Mg of the sameproduct produced on the same mill from the same heat of steel.When material from one heat differs116 in. 2 mm or more
28、inthickness, tests shall be made from both the thickest andthinnest 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 be
29、en heat treated by quenching andtempering, in 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
30、 15 tons 15Mg or each single length of 15 tons 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 sh
31、all not exceed 15tons 15 Mg.5.2.3 BarsOne Charpy 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 noncon
32、tinuous furnace, one test shallbe taken from 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 plates are to be supplied in the as-rolledcondition the manufacturer or process
33、or (see SpecificationA6/A6M) has the option to heat treat the plates by normalizingor stress relieving or normalizing and stress relieving to meetthe desired toughness properties.NOTEThe notch for any of the specimens can be on either side of the beam centerline.FIG. 3 Alternate Core Location for CV
34、N SpecimensTABLE 1 Equivalent Absorbed Energy for Various Specimen SizesFull Size,10 by 10 mm3/4 Size,10 by 7.5 mm2/3 Size,10 by 6.7 mm1/2 Size,10 by 5 mm1/3 Size,10 by 3.3 mm1/4 Size,10 by 2.5 mmftlbf J ftlbf J ftlbf J ftlbf J ftlbf J ftlbf J40 54 30 41 27 37 20 27 13 18 10 1435 48 26 35 23 31 18 2
35、4 12 16 9 1230 41 22 30 20 27 15 20 10 14 8 1125 34 19 26 17 23 12 16 8 11 6 820 27 15 20 13 18 10 14 7 10 5 716 22 12 16 11 15 8 11 5 7 4 515 20 11 15 10 14 8 11 5 7 4 513 18 10 14 9 12 6 8 4 5 3 412 16 9 12 8 11 6 8 4 5 3 410 14 8 11 7 10 5 7 3 4 2 37 10 5 7 5 7 4 5 2 3 2 3A673/A673M 07 (2012)36.3
36、 When the fabricator elects to perform the required heattreatment or fabricates by hot forming instead of heat treating,the plates shall be accepted on the basis of tests made onfull-thickness specimens heat treated in accordance with thepurchasers order requirements. If the heat treatment tempera-t
37、ures are not indicated on the purchase order, the manufactureror processor shall heat treat the specimens under conditionsconsidered appropriate for grain refinement and to meet thetoughness requirements. The plate manufacturer or processorshall inform the purchaser of the procedure followed in trea
38、tingthe specimens.7. Retests7.1 If more than one individual test value is below thespecified minimum average value, or if individual test value isbelow the greater of 5 ftlbf 7 J and two thirds of the specifiedminimum average value, a retest of three additional specimensshall be made, and each indiv
39、idual test value for such retestshall be equal to or greater than the specified minimum averagevalue.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 material orreheat treated in the
40、 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 material shall be rejectedand t
41、he 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 Reports8.1 Test reports for
42、each heat supplied are required whenspecified by the purchase order.8.1.1 Test reports shall show the results of each test requiredby the specification. However, for (H) frequency, only one testneed be reported when the amount of material from a shipmentis less than 50 tons 45 Mg or two tests when t
43、he 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 testing is ordered. Tests from material thicknesses inaccordance with 5.1 and encompassing the thicknesses in aship
44、ment 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 plates produced from coils, all three test resultsshall be reported for each qualifying coil. If only half or les
45、s 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 processor shall be identified on the test report.8.1.5 Asignature is not required on the test report. However,the do
46、cument 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
47、supplyingthat material shall provide the purchaser with a copy of theoriginal manufacturers test report.9. Keywords9.1 charpy V-notch; impact; sampling procedure; steel;structural steel; testingAPPENDIX(Nonmandatory Information)X1. VARIATION IN CHARPY V-NOTCH TESTSX1.1 A survey of the variation to b
48、e expected in CharpyV-notch test results obtained from three common fine grainplate steels was conducted by the American Iron and SteelInstitute (AISI).3The results of the survey are contained in aContributions to the Metallurgy of Steel entitled, “The Varia-tions of Charpy V-Notch Impact Test Prope
49、rties in SteelPlates, (SU/24), published January 1979. The survey dataconsists of test values obtained from six locations in addition tothe locations shown in Fig. 1 of this specification. The plateconditions tested involved as-rolled, normalized, and quenchand tempered. Sufficient full-size specimens were taken fromeach sample so that three longitudinal and three transv
