1、Designation: A606/A606M 18Standard Specification forSteel, Sheet and Strip, High-Strength, Low-Alloy, Hot-Rolledand Cold-Rolled, with Improved Atmospheric CorrosionResistance1This standard is issued under the fixed designation A606/A606M; the number immediately following the designation indicates th
2、e 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 use by agencies of the U.S
3、. Department of Defense.1. Scope*1.1 This specification covers high-strength, low-alloy, hot-and cold-rolled sheet and strip in cut lengths or coils, intendedfor use in structural and miscellaneous purposes, where savingsin weight or added durability are important. These steels haveenhanced atmosphe
4、ric corrosion resistance and are supplied inthree types: Type 2 contains 0.20 % minimum copper based oncast or heat analysis (0.18 % minimum Cu for product check).Type 4 and Type 5 contains additional alloying elements andprovides a level of corrosion resistance substantially better thanthat of carb
5、on steels with or without copper addition (Note 1).When properly exposed to the atmosphere, Type 4 and Type 5steels can be used in the bare (unpainted) condition for manyapplications.NOTE 1For methods of establishing the atmospheric corrosion resis-tance of low-alloy steels, see Guide G101.1.2 The v
6、alues stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the stand
7、ard.1.3 WeldingIn general, the steels listed in this specifica-tion are weldable with commonly obtained welding electrodes.When the steel is to be welded, a suitable welding procedurebased on its composition should be used, taking into accountintended use and service temperatures.NOTE 2For a general
8、 discussion of the weldability of steel and carbonequivalents, consult Appendix X3 of A6/A6M.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Stand
9、ards, 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 Steel Bars, Plates, Shapes, and Sheet PilingA109/A109M Specification for S
10、teel, Strip, Carbon (0.25Maximum Percent), Cold-RolledA370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA568/A568M Specification for Steel, Sheet, Carbon,Structural, and High-Strength, Low-Alloy, Hot-Rolled andCold-Rolled, General Requirements forA749/A749M Specification for S
11、teel, Strip, Carbon andHigh-Strength, Low-Alloy, Hot-Rolled, General Require-ments forG101 Guide for Estimating the Atmospheric Corrosion Re-sistance of Low-Alloy Steels3. General Requirements for Delivery3.1 Material furnished under this specification shall con-form to the applicable requirements o
12、f the current edition ofSpecification A568/A568M and the dimensional tolerancetables of Specification A109/A109M, unless otherwise pro-vided herein.4. Ordering Information4.1 Orders for material under this specification shall includethe following information, as required, to describe adequatelythe d
13、esired material:4.1.1 ASTM specification number and date of issue, andtype,1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.19 on Steel Sheet and Strip.Current edition approved March 1,
14、 2018. Published March 2018. Originallyapproved in 1970. Last previous edition approved in 2015 as A606/A606M 15.DOI: 10.1520/A0606_A0606M-18.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards vol
15、ume 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 StatesThis international standard was developed
16、 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 (TBT) Committee.14.1.2 Name of material
17、(high-strength low-alloy hot-rolledsheet or strip or high-strength low-alloy cold-rolled sheet orstrip),4.1.2.1 Hot rolled sheet shall either be CS or Grade 50(Grade 50 shall be supplied if not specified).4.1.2.2 Cold rolled sheet shall either be CS or Grade 45(Grade 45 shall be supplied if not spec
18、ified).4.1.3 Condition (specify oiled or dry, as required),4.1.4 Edges (must be specified for hot-rolled sheet or strip)(see 8.1),4.1.5 FinishCold-rolled only (indicate exposed (E) orunexposed (U). Matte (dull) finish will be supplied unlessotherwise specified), and4.1.6 Dimensions (thickness, width
19、, and whether cut lengthsor coils).NOTE 3Not all producers are capable of meeting all of the limitationsof the thickness tolerance tables in Specification A568/A568M. Thepurchaser should contact the producer regarding possible limitations priorto placing an order.4.2 The purchaser has the option to
20、specify additionalrequirements, including but are not limited, to the following:4.2.1 Coil size (must include inside diameter, outsidediameter, and maximum weight),4.2.2 Application (show part identification and description),4.2.3 Cast or heat (formerly ladle) analysis and mechanicalproperties repor
21、t (if required) (see 10.1), and4.2.4 When the purchaser requires thickness tolerances for38 in. 10 mm minimum edge distance (see SupplementaryRequirement in Specification A568/A568M), this requirementshall be specified in the purchase order or contract.4.2.5 Impact toughness requirements at a specif
22、ied testtemperature, if required.4.2.6 Other special requirements, if any.NOTE 4A typical ordering description is as follows: “ASTMA606XX, Grade 50, Type 4 high-strength low-alloy hot-rolled sheet, dry,mill edge 0.106 by 48 by 96 in. for truck frame side members.” Or,“ASTM A606MXX, Grade 345, Type 5
23、 high-strength low-alloy hot-rolled sheet, dry, mill edge, 2.7 by 1220 mm by coil for truck frame sidemembers.”5. Materials and Manufacture5.1 ConditionThe material shall be furnished hot-rolled orcold-rolled as specified on the purchase order.5.2 Heat Treatment Unless otherwise specified, Type 2and
24、 Type 4 steels shall be furnished as hot-rolled. Whenhot-rolled annealed or hot-rolled normalized material isrequired, it shall be specified on the purchase order.5.2.1 For Type 5, although the recommended maximum hotrolling temperature is 2100F 1150C, the actual temperatureselected is at the discre
25、tion of the producer.5.2.2 Type 5 is normalized by heating to 1600 to 1700F870 to 925C and then cooled in still air. The yield strengthof Type 5 is increased by precipitation hardening at 1000 to1050F 535 to 565C for 20 to 60 min, depending on theamount of strength increase desired by the producer.6
26、. Chemical Composition6.1 The maximum limits of carbon, manganese, and sulfurshall be as prescribed in Table 1, unless otherwise agreed uponbetween the manufacturer and the purchaser.6.2 The manufacturer shall use alloying elements, such aschromium, nickel, copper, and phosphorus, combined with thec
27、arbon, manganese, and sulfur within the limits prescribed inTable 1 to satisfy the mechanical properties prescribed in Table2 or Table 3. As indicated in 1.1, these steels have enhancedatmospheric corrosion resistance and are supplied in threetypes: Type 2, Type 4, and Type 5. When requested, thepro
28、ducer shall supply acceptable evidence of corrosion resis-tance to the purchaser.6.2.1 For Type 2 steel, confirmation of the minimum coppercontent requirement of 1.1 shall be sufficient evidence ofcorrosion resistance.6.2.2 For Type 4 and Type 5 steels, the basis for thisevidence can be a corrosion-
29、resistance index calculated fromthe chemical composition of the steel in accordance with GuideG101. To comply with Specification A606, Type 4 or Type 5steel shall have a minimum corrosion-resistance index of 6.0,based upon Guide G101 (see Note 5).NOTE 5The user is cautioned that the Guide G101 predi
30、ctive equationfor calculation of an atmospheric corrosion index has been verified onlyfor the composition limits stated in that guide. The composition of Type 4or Type 5 steels determines which calculation procedure (Larabee-Coburnor Townsend methods) should be used to obtain a minimum index of 6.0i
31、n accordance with Guide G101. The Larabee-Coburn equation of 6.3.1.1limits the amount of copper to 0.51 % max. Type 5 steels exceed this limitand some Type 4 compositions may contain more than 0.51 % copper,requiring use of the Townsend method of Section 6.3.2.6.3 When the steel is used in welded ap
32、plications, weldingprocedure shall be suitable for the steel chemistry as describedin 6.2 and the intended service.TABLE 1 Chemical RequirementsType of A606 SteelComposition, max, %; ranges and minimumexceptedCast or Heat(Formerly Ladle)AnalysisProduct Check,or VerificationAnalysisType 2 and Type 4B
33、CarbonA0.22 0.26Manganese 1.25 1.30Sulfur 0.04 0.06Copper 0.20 min 0.18 minType 5Carbon 0.09 0.12Manganese 0.700.95 0.661.00Phosphorus 0.025 0.030Sulfur 0.010 0.015Silicon 0.40 0.45Nickel 0.520.76 0.500.79Chromium 0.30 0.34Copper 0.650.98 0.631.00Titanium 0.15 0.16Vanadium 0.15 0.16Niobium 0.08 0.09
34、AFor compositions with a maximum carbon content of 0.15 % on heat or castanalysis, the maximum limit for manganese on heat or cast analysis may beincreased to 1.40 % (with product analysis limits of 0.19 % carbon and 1.45 %manganese).BThe addition of other alloying elements to obtain the required at
35、mosphericcorrosion resistance is at the discretion of the manufacturer for Type 4.A606/A606M 1827. Mechanical Property Requirements7.1 Material ordered as CS has no mechanical propertiesrequirements. Specific requirements may be added if agreedupon between the purchaser and the producer.7.2 Tension
36、Tests:7.2.1 RequirementsMaterial ordered to either Grade 50 ashot rolled or Grade 45 as cold rolled shall conform to thetensile requirements specified in Table 2 (hot-rolled material)or in Table 3 (cold-rolled material).7.2.2 Number of TestsTwo tensile tests shall be made fromeach heat or from each
37、lot of 50 tons 45 000 kg. When theamount of finished material from a heat or lot is less than 50tons 45 000 kg, one test shall be made. When material rolledfrom one heat differs 0.050 in. 1.27 mm or more in thickness,one tensile test shall be made from the thickest and thinnestmaterial regardless of
38、 the weight represented.7.2.3 Location and Orientation:7.2.3.1 Tensile test specimens shall be taken at a pointimmediately adjacent to the material to be qualified.7.2.3.2 Tensile test samples shall be taken from the fullthickness of the sheet as rolled.7.2.3.3 Tensile test specimens shall be taken
39、from a locationapproximately halfway between the center of the sheet and theedge of the material as rolled.7.2.3.4 Tensile test specimens shall be taken with the axis ofthe test specimen parallel to the rolling direction (longitudinaltest).7.2.4 Test MethodYield strength shall be determined byeither
40、 the 0.2 % offset method or by the 0.5 % extension underload method unless otherwise specified.7.3 Bending PropertiesThe minimum forming radius (ra-dii) that steel covered by this specification can be expected tosustain is listed in the Appendix X1 and is discussed in moredetail in Specifications A5
41、68/A568M and A749/A749M.Where tighter bend radii are required, where curved or offsetbends are involved, or where stretching or drawing are also aconsideration, the producers should be consulted.7.4 Charpy V-notch Impact PropertiesThe purchaser hasthe option to require minimum Charpy V-notch impact
42、prop-erties of 15 ft-lbs 20 J or more at a specified test temperature,based on a full size test specimen of 0.3937 in 10 mmthickness. Typically the test temperature is the lowest antici-pated service temperature of the application. The minimumthickness permitted in accordance with Table 9 of Test Me
43、th-ods A370 for a subsize Charpy V-notch specimen is 0.100 in2.5 mm.8. Edges, Oiling, Surface Finish, and Appearance8.1 Edges:8.1.1 Hot-RolledIn the as-rolled condition the materialhas mill edges. Pickled or blast-cleaned material has cut edges.When required, as-rolled material may be specified to h
44、ave cutedges. If mill edge material is required it must be specified.8.1.2 Cold-RolledCold-rolled material shall have cutedges only.8.2 Oiling:8.2.1 Hot-RolledUnless otherwise specified, hot-rolled as-rolled material shall be furnished dry, and hot-rolled pickled orblast-cleaned material shall be fu
45、rnished oiled. When required,pickled or blast-cleaned material may be specified to befurnished dry, and as-rolled material may be specified to befurnished oiled.8.2.2 Cold-RolledUnless otherwise specified, cold-rolledmaterial shall be oiled. When required, cold-rolled materialmay be specified to be
46、furnished dry, but is not recommendeddue to the increased possibility of rusting.8.3 Surface Finish:8.3.1 Hot-RolledUnless otherwise specified, hot-rolledmaterial shall have an as-rolled, not pickled surface finish.When required, material may be specified to be pickled orblast-cleaned.8.3.2 Cold-Rol
47、ledUnless otherwise specified, cold-rolledmaterial shall have a matte (dull) finish.9. Retests and Disposition of Non-Conforming Material9.1 Retests, conducted in accordance with the requirementsof Section 11.1 of Specification A568/A568M, are permittedwhen an unsatisfactory test result is suspected
48、 to be theconsequence of the test method procedure.9.2 Disposition of non-conforming material shall be subjectto the requirements of Section 11.2 of Specification A568/A568M.10. Certification10.1 When requested, the manufacturer shall furnish copiesof a test report showing the results of the heat or
49、 cast analysisand mechanical property tests made to determine compliancewith this specification. The report shall include the purchaseorder number, the ASTM designation number, and the heat orlot number correlating the test results with the materialrepresented.10.1.1 The heat or cast analysis shall include reporting theelements listed in 6.1 and reporting the following elements.10.1.1.1 Copper, chromium, nickel, phosphorous, niobium,vanadium, titanium, molybdenum, sulphur, nitrogen,manganese, and carbon.10.1.1.2 For niobium, tit
