1、Designation: A 710/A 710M 02 (Reapproved 2007)Standard Specification forPrecipitationStrengthened Low-Carbon Nickel-Copper-Chromium-Molybdenum-Columbium Alloy Structural SteelPlates1This standard is issued under the fixed designationA 710/A 710M; the number immediately following the designation indi
2、cates 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 use by agencies o
3、f the Department of Defense.1. Scope1.1 This specification covers low-carbon precipitationstrengthened nickel - copper - chromium - molybdenum -columbium alloy steel plates for general applications. Thealloys in this specification are strengthened by precipitation invarious temperature ranges. Preci
4、pitation strengthening canoccur upon air cooling after hot rolling, during normalizing,and by another heat treatment. These grades are not intendedfor use in applications above 900F 540C.1.2 Two grades, each with three classes, are provided asfollows:Grade and Class ConditionGrade A, Class 1 as-roll
5、ed and precipitation heat treatedGrade A, Class 2 normalized and precipitation heat treatedGrade A, Class 3 quenched and precipitation heat treatedGrade B, Class 1 as-rolledGrade B, Class 2 normalizedGrade B, Class 3 normalized and precipitation heat treated1.3 Grade A provides minimum yield strengt
6、h levels rang-ing from 50 to 85 ksi 345 to 585 MPa, depending onthickness and condition.1.4 Grade A, Class 1, plates are limited to a maximumthickness of34 in. 20 mm. The maximum thickness of GradeA, Classes 2 and 3, is limited only by the capacity of thecomposition to meet the specified mechanical
7、property require-ments; however, current practice normally limits the maximumthickness to 8 in. 200 mm.1.5 Mandatory notch toughness requirements are specifiedfor Grade A, Class 1.1.6 Grade B provides minimum yield strength levels rang-ing from 70 to 75 ksi 480 to 515 MPa, depending onthickness and
8、condition.1.7 Grade B plates are limited to a maximum thickness of 2in. 50 mm.1.8 Mandatory notch toughness requirements are specifiedfor the three classes of Grade B.1.9 When the steel is to be welded, it is presupposed that awelding procedure suitable for the grade of steel and intendeduse or serv
9、ice will be utilized. See Appendix X3 of Specifica-tion A 6/A 6M for information on weldability.1.10 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard. Within the text, theSI units are shown in brackets. The values stated in eachsystem are not exact eq
10、uivalents; therefore, each system mustbe used independently of the other. Combining values from thetwo systems may result in nonconformance with the specifi-cation.2. Referenced Documents2.1 ASTM Standards:2A 6/A 6M Specification for General Requirements forRolled Structural Steel Bars, Plates, Shap
11、es, and SheetPilingA 673/A 673M Specification for Sampling Procedure forImpact Testing of Structural Steel3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 precipitation heat treatmenta sub-critical tempera-ture thermal treatment performed to cause precipitation ofsubmicroscopic
12、al constituents, etc., so as to result in enhance-ment of some desirable property.3.1.2 precipitation strengtheningthe precipitation of sub-microscopic and/or microscopic constituents of an alloy atvarious temperatures, which results in the alteration of certainproperties.3.1.3 soakto hold at temper
13、ature after the material hasattained the temperature throughout.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.C
14、urrent edition approved March 1, 2007. Published March 2007. Originallyapproved in 1974. Last previous edition approved in 2002 as A 710/A 710M 02.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandard
15、s 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, United States.4. General Requirements for Delivery4.1 Material furnished under this specification shall con-form
16、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.5. Materials and Manufacture5.1 The steel shall be made to fine grain practice.6. Heat Treatment6.1 Grade A, Class 1 material shall be
17、 precipitation heattreated in the temperature range from 1000 to 1300F 540 to705C for a time to be determined by the material manufac-turer.6.2 Grade A, Class 2 material shall be normalized at atemperature in the range from 1600 to 1700F 870 to 925Cand then precipitation heat treated at a temperatur
18、e in the rangefrom 1000 to 1300F 540 to 705C for a time to bedetermined by the material manufacturer.6.3 Grade A, Class 3 material shall be quenched in water oroil from a temperature in the range from 1600 to 1700F 870to 925C and then precipitation heat treated at a temperaturein the range from 1000
19、 to 1300F 540 to 705C for a time tobe determined by the material manufacturer.6.4 Grade B, Class 1 shall be hot-rolled.6.5 Grade B, Class 2 shall be normalized after hot rolling byreheating to 1600 to 1700F 870 to 925C, and then cooled instill air.6.6 Grade B, Class 3, shall be normalized at 1600 to
20、 1700F870 to 925C, and then precipitation heat treated at 1000 to1300F 540 to 705C for a time to be determined by thematerial manufacturer. One hour at a specified temperature isgenerally considered as a maximum.6.7 If the purchaser elects to perform the thermal (heat)treatment, the material shall b
21、e accepted on the basis of milltests from test coupons heat treated in accordance with thepurchase order requirements. If the test coupon heat treatmentrequirements are not indicated on the purchase order, themanufacturer shall heat treat the test coupons under conditionshe considers appropriate. Th
22、e manufacturer shall inform thepurchaser of the procedure followed in thermally treating thetest coupons at the mill.7. Chemical Composition7.1 The heat analysis shall conform to the requirements asto chemical composition prescribed in Table 1.7.2 The steel shall conform on product analysis to there
23、quirements prescribed in Table 1, subject to the productanalysis tolerance in Specification A 6/A 6M for alloy steels.8. Tension Test8.1 The material, as represented by the test specimens, shallconform to the requirements specified in Table 2.8.2 Number of TestsOne tension test shall be taken froma
24、corner of each plate as heat treated for each class of material.For plates38 in. 10 mm and under in thickness, a tension testshall be made from a corner of each of two plates per lot. A lotshall consist of plates from the same heat and thickness, sameprior condition and scheduled heat treatment, and
25、 shall notexceed 15 tons 13.6 Mg in weight. Plates wider than 24 in.610 mm shall be tested in the transverse direction and aresubject to the modifications for elongation contained in foot-noteDof Table 2.9. Notch Toughness Requirements9.1 Notch Toughness TestsGrade A, Class 1:9.1.1 Notch toughness t
26、ests shall be made in accordancewith Test Frequency H of Specification A 673/A 673M. Uponagreement, transverse tests may be specified insteadof the longitudinal tests specified in Specification A 673/A 673M (plates only).9.1.2 The test results shall meet a minimum average valueof 20 ftlbf 27 J at 50
27、F 45C for longitudinal specimens.For transverse specimens, the test results shall meet a mini-mum average value of 15 ftlbf 20 J at 50F 45C. Byagreement, a test temperature lower than 50F 45C maybe used.9.2 Notch Toughness TestsGrade B:9.3 Notch toughness tests shall be made in accordance withTest F
28、requency H of Specification A 673 / A 673M.9.4 The test results for Grade B, Class 1, and Grade B, Class3, shall have a minimum average notch toughness of 35 ftlbf47 J at -10F -23C in the longitudinal direction of theplate. For Grade B, Class 2, test results shall have a minumumTABLE 1 Chemical Requ
29、irementsElementComposition, %Grade A Grade BCarbon 0.07 max 0.030.09Manganese 0.400.70 0.451.30Phosphorus, max 0.025 0.025Sulfur, max 0.025 0.025Silicon 0.40 max 0.300.50Nickel 0.701.00 0.801.00Chromium 0.600.90 0.30 maxMolybdenum 0.150.25 0.25 maxCopper 1.001.30 1.251.50Columbium 0.02 min 0.020.06T
30、itanium . 0.010.03NOTE: Where an ellipsis (.) appears in the table, there is no requirement.A 710/A 710M 02 (2007)2average notch toughness of 20 ftlbf 27 J at -50F -45C inthe longitudinal direction of the plate.10. Retreatment10.1 Thermally treated material that fails to meet the me-chanical propert
31、y requirements may be reheat-treated. Allrequired tests shall be repeated when material is resubmittedfor inspection.11. Keywords11.1 alloy; carbon; chromium; columbium; copper; generalapplications; low carbon; manganese; molybdenum; nickel;plates; precipitation heat treatment; precipitation strengt
32、hen-ing; steel; structural steelSUPPLEMENTARY REQUIREMENTSSupplementary requirements shall not apply unless specified in the purchase order or contract.Standardized supplementary requirements for use at the option of the purchaser are listed inSpecification A 6/A 6M. In addition, the following suppl
33、ementary requirement is also suitable for usewith this specification:S94. Notch ToughnessGrade A, Classes 2 and 3S94.1 Notch toughness tests on longitudinal specimens shallbe made in accordance with Test Frequency H of SpecificationA 673/A 673M.S94.2 Grade A, Class 2The test results shall meet amini
34、mum average value of 50 ftlbf 69 J at 50F 45C.S94.3 Grade A, Class 3The test results shall meet aminimum average value of 50 ftlbf 69 J at 80F 60C.TABLE 2 Tensile RequirementsAGrade AClass 1Grade AClass 2Grade AClass 3Grade BClass 1Grade BClass 2Grade BClass 3Yield strength,Bmin, ksi MPa14 in. 6.5 m
35、m and under 85 585 65 450 80 550 70 485 70 485 70 515Over14 in. to516 in. 6.5 to 8 mm, incl 85 585 65 450 80 550 70 485 70 485 70 515Over516 in. to38 in. 8 to 10 mm, incl 80 550 65 450 80 550 70 485 70 485 70 515Over38 in. to12 in. 10 to 12.5 mm, incl 80 550 65 450 80 550 70 485 70 485 70 515Over12
36、in. to34 in. 12.5 to 20 mm, incl 80 550 65 450 80 550 70 485 70 485 70 515Over34 in. to 1 in. 20 to 25 mm, incl . 65 450 80 550 70 485 70 485 70 485Over 1 in. to 114 in. 25 to 30 mm, incl . 60 415 80 550 . 70 485 70 485Over 114 in. to 2 in. 30 to 50 mm, incl . 60 415 75 515 . 70 485 70 485Over 2 in.
37、 to 4 in. 50 to 100 mm, incl . 55 380 65 450 . . .Over 4 in. 100 mm . 50 345 60 415 . . .Tensile strength, min, ksi MPa14 in. 6.5 mm and under 90 620 72 495 85 585 80 550 80 550 80 585Over14 in. to516 in. 6.5 to 8 mm, incl 90 620 72 495 85 585 80 550 80 550 80 585Over516 in. to38 in. 8 to 10 mm, inc
38、l 90 620 72 495 85 585 80 550 80 550 80 585Over38 in. to12 in. 10 to 12.5 mm, incl 90 620 72 495 85 585 80 550 80 550 80 585Over12 in. to34 in. 12.5 to 20 mm, incl 90 620 72 495 85 585 80 550 80 550 80 585Over34 in. to 1 in. 20 to 25 mm, incl . 72 495 85 585 80 550 80 550 80 550Over 1 in. to 114 in.
39、 25 to 30 mm, incl . 72 495 85 585 . 80 550 80 550Over 114 in. to 2 in. 30 to 50 mm, incl . 72 495 85 585 . 80 550 80 550Over 2 in. to 4 in. 50 to 100 mm, incl . 65 450 75 515 . . .Over 4 in. 100 mm . 60 415 70 485 . . .Elongation in 2 in. or 50 mm, min, %CD20 20 20 20 20 20NOTE: Where ellipses (.)
40、appear in the table, there is no requirement.AFor plates wider than 24 in. 600 mm, the test specimen is taken in the transverse direction. See Specification A 6/A 6M, Tension Tests requirements.B0.2 % offset or 0.5 % extension-under-load.CFor thickness of34 in. 20 mm and under, measured on 112 in. 4
41、0 mm wide full thickness rectangular specimen as shown in Fig. 4 of Test Methods and DefinitionsA 370. The elongation is measured in a 2-in. 50-mm gage length which includes the fracture and which shows the greatest elongation.DFor plates wider than 24 in. 600 mm, the elongation requirement is reduc
42、ed two percentage points.A 710/A 710M 02 (2007)3ASTM 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,
43、 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 revised, either reapproved or withdrawn. Your comments are invited either for rev
44、ision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you
45、 shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).A 710/A 710M 02 (2007)4
