1、Designation: A 673/A673M 07American 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 A 673/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 (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for
3、use by agencies of the Department of Defense.1. Scope*1.1 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, control rolled,
4、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 product will reduce
5、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 absorption levels and
6、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 system are no
7、texact 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:2A 6/A 6M Specification for General Requirements forRolled Structural Steel Bars, P
8、lates, Shapes, and SheetPilingA 370 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 absorbed energy
9、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 tempered).4.
10、 Tests4.1 Impact testing shall be in accordance with Test Methodsand Definitions A 370. 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 in the purch
11、aseorder, 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 location at an en
12、d 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 couponshall be o
13、btained from a location adjacent to the locationspecified for each of the two required tension tests (seeSpecification A 6/A 6M) and the third test coupon shall beobtained from a location immediately after the last plateproduced to the qualifying specification.1This specification is under the jurisd
14、iction 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 March 1, 2007. Published March 2007. Originallyapproved in 1972. Last previous
15、edition approved in 2005 as A 673/A 673M 05a.2For 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.1*A Summary of C
16、hanges section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.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
17、 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 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 betwe
18、en the surface and the center 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 l
19、ongitudinal axis of eachspecimen 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
20、 in Table1, which are proportional 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
21、 order,provided that the absorbed 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 made
22、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 through H.NOT
23、E 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 Test Loca
24、tionA 673/A673M 072for each 50 tons 45 Mg of the same type of product subjectto 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 th
25、ickest material rolledsubject 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 diff
26、ers 1 in. 25 mm or morein 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
27、 next nearest thicknessavailable. 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 differ
28、s116 in. 2 mm or more 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 fo
29、r material that has been 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 m
30、ade from at least each 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 contin
31、uous furnace, a lot shall 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 he
32、at treated in a noncontinuous 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 m
33、anufacturer or processor (see SpecificationA 6/A 6M) has the option to heat treat the plates by normaliz-ing or stress relieving or normalizing and stress relieving tomeet the desired toughness properties.6.3 When the fabricator elects to perform the required heattreatment or fabricates by hot formi
34、ng instead of heat treating,NOTEThe notch for any of the specimens can be on either side of the beam centerline.FIG. 3 Alternate Core Location for CVN 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
35、 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 24 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
36、 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 3A 673/A673M 073the plates shall be accepted on the basis of tests made onfull-thickness specimens heat treated in accordance with thepurchasers order requirements. If the heat
37、 treatment tempera-tures 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 proced
38、ure followed in treatingthe 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
39、made, and each individual 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 orr
40、eheat 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 material sh
41、all 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 Reports8
42、.1 Test reports for 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
43、 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 testing is ordered. Tests from material thicknesses inaccordance with 5.1 and encompassing the
44、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 plates produced from coils, all three test resultsshall be reported for each qualifying coil.
45、 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 processor shall be identified on the test report.8.1.5 Asignature is not required on the test re
46、port. 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 A 673/A 6
47、73M, the organization 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
48、 of the variation to be 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-N
49、otch Impact Test Properties 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 longitud
