1、Designation: A588/A588M 10American Association StateHighway and Transportation Officials StandardAASHTO No.: M 222Standard Specification forHigh-Strength Low-Alloy Structural Steel, up to 50 ksi 345MPa Minimum Yield Point, with Atmospheric CorrosionResistance1This standard is issued under the fixed
2、designation A588/A588M; 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
3、revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This specification covers high-strength low-alloy struc-tural steel shapes, plates, and bars for welded, riveted, or boltedconstruction but intended primarily for use in welded bridge
4、sand buildings where savings in weight or added durability areimportant. The atmospheric corrosion resistance of this steel inmost environments is substantially better than that of carbonstructural steels with or without copper addition (see Note 1).When properly exposed to the atmosphere, this stee
5、l is suitablefor many applications in the bare (unpainted) condition. Thisspecification is limited to material up to 8 in. 200 mminclusive in thickness.NOTE 1For methods of estimating the atmospheric corrosion resis-tance of low-alloy steels, see Guide G101.1.2 When the steel is to be welded, a weld
6、ing proceduresuitable for the grade of steel and intended use or service is tobe utilized. See Appendix X3 of Specification A6/A6M forinformation on weldability.1.3 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard. Within the text, theSI units are sho
7、wn in brackets. The values stated in eachsystem are not exact equivalents; therefore, each system is tobe used independently of the other, without combining valuesin any way.1.4 The text of this specification contains notes, footnotes,or both, that provide explanatory material. Such notes andfootnot
8、es, excluding those in tables and figures, do not containany mandatory requirements.1.5 For structural products produced from coil and fur-nished without heat treatment or with stress relieving only, theadditional requirements, including additional testing require-ments and the reporting of addition
9、al test results, of Specifi-cation A6/A6M apply.2. Referenced Documents2.1 ASTM Standards:2A6/A6M Specification for General Requirements for RolledStructural Steel Bars, Plates, Shapes, and Sheet PilingG101 Guide for Estimating the Atmospheric CorrosionResistance of Low-Alloy Steels3. General Requir
10、ements for Delivery3.1 Structural products furnished under this specificationshall conform to the requirements of the current edition ofSpecification A6/A6M, for the specific structural productordered, unless a conflict exists, in which case this specificationshall prevail.3.2 Coils are excluded fro
11、m qualification to this specifica-tion until they are processed into a finished structural product.Structural products produced from coil means structural prod-ucts that have been cut to individual lengths from a coil. Theprocessor directly controls, or is responsible for, the operationsinvolved in
12、the processing of a coil into a finished structuralproduct. Such operations include decoiling, leveling orstraightening, hot-forming or cold-forming (if applicable),cutting to length, testing, inspection, conditioning, heat treat-ment (if applicable), packaging, marking, loading for shipment,and cer
13、tification.NOTE 2For structural products produced from coil and furnishedwithout heat treatment or with stress relieving only, two test results are tobe reported for each qualifying coil. Additional requirements regardingstructural products produced from coil are described in SpecificationA6/A6M.4.
14、Materials and Manufacture4.1 The steel shall be made to fine grain practice.5. Chemical Composition5.1 The heat analysis shall conform to the requirementsprescribed in Table 1.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the d
15、irect responsibility of SubcommitteeA01.02 on Structural Steel for Bridges, Buildings, Rolling Stock and Ships.Current edition approved Sept. 1, 2010. Published September 2010. Originallyapproved in 1968. Last previous edition approved in 2005 as A588/A588M 05.DOI: 10.1520/A0588_A0588M-10.2For refer
16、enced 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 Changes section appears at the end of this standard.Copy
17、right ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.2 The steel shall conform on product analysis to therequirements prescribed in Table 1, subject to the productanalysis tolerances in Specification A6/A6M.5.3 The atmospheric corrosion-resi
18、stance index, calculatedon the basis of the heat analysis of the steel, as described inGuide G101Predictive Method Based on the Data of Larabeeand Coburn, shall be 6.0 or higher.NOTE 3The user is cautioned that the Guide G101 predictive equation(Predictive Method Based on the Data of Larabee and Cob
19、urn) forcalculation of an atmospheric corrosion-resistance index has only beenverified for the composition limits stated in the guide.5.4 When required, the manufacturer shall supply evidenceof corrosion resistance satisfactory to the purchaser.6. Tensile Requirements6.1 The material as represented
20、by the test specimens shallconform to the requirements for tensile properties prescribed inTable 2.7. Keywords7.1 atmospheric corrosion resistance; bars; bolted construc-tion; bridges; buildings; durability; high-strength; low-alloy;plates; riveted construction; shapes; steel; structural steel;weigh
21、t; welded constructionSUPPLEMENTARY REQUIREMENTSSupplementary requirements shall not apply unless specified in the order or contract. Standardizedsupplementary requirements for use at the option of the purchaser are listed in Specification A6/A6M.Those that are considered suitable for use with this
22、specification are listed by title:S2. Product Analysis,S3. Simulated Post-Weld Heat Treatment of MechanicalTest Coupons,S5. Charpy V-Notch Impact Test,S6. Drop-Weight Test (for Material 0.625 in. 16 mm andover in Thickness),S8. Ultrasonic Examination,S15. Reduction of Area Measurement,S18. Maximum T
23、ensile Strength,S30. Charpy V-Notch Impact Test for Structural Shapes:Alternate Core Location, andS32. Single Heat Bundles.TABLE 1 Chemical Requirements (Heat Analysis)NOTE 1Where “. . .” appears in this table, there is no requirement.ElementComposition, %Grade A Grade B Grade KCarbonA0.19 max 0.20
24、max 0.17 maxManganeseA0.801.25 0.751.35 0.501.20Phosphorus 0.04 max 0.04 max 0.04 maxSulfur 0.05 max 0.05 max 0.05 maxSilicon 0.300.65 0.150.50 0.250.50Nickel 0.40 max 0.50 max 0.40 maxChromium 0.400.65 0.400.70 0.400.70Molybdenum . . 0.10 maxCopper 0.250.40 0.200.40 0.300.50Vanadium 0.020.10 0.010.
25、10 .Columbium . . 0.0050.05BAFor each reduction of 0.01 percentage point below the specified maximum forcarbon, an increase of 0.06 percentage point above the specified maximum formanganese is permitted, up to a maximum of 1.50 %.BFor plates under12 in. 13 mm in thickness, the minimum columbium iswa
26、ived.TABLE 2 Tensile RequirementsANOTE 1Where “. . . appears in this table, there is no requirement.Plates and BarsStructuralShapesFor Thick-nesses4 in. 100mm andUnderFor Thick-nessesOver 4 in. 100mmto 5 in. 125mm inclFor Thick-nessesOver 5 in. 125mmto 8 in.200mm inclAllTensile strength,min,ksi MPa7
27、0 485 67 460 63 435 70 485Yield point, min,ksi MPa50 345 46 315 42 290 50 345Elongation in 8in. 200 mm,min, %18B,C. . 18CElongation in 2in. 50 mm,min, %21B,C21B,C21B,C21DASee specimen orientation under the Tension Tests section of SpecificationA6/A6M.BElongation not required to be determined for flo
28、or plate.CFor plates wider than 24 in. 600 mm, the elongation requirement is reducedtwo percentage points. See elongation requirement adjustments in the TensionTests section of Specification A6/A6M.DFor wide flange shapes with flange thickness over 3 in. 75 mm, elongation in2 in. 50 mm of 18 % minim
29、um applies.A588/A588M 102SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this standard since the last issue(A588/A588M 05) that may impact the use of this standard. (Approved Sept. 1, 2010.)(1) Revised Table 1 to delete Grade C information.ASTM International takes
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33、ddress 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).A588/A588M 103
