1、Designation:A490M11 Designation: A490M 12Standard Specification forHigh-Strength Steel Bolts, Classes 10.9 and 10.9.3, forStructural Steel Joints (Metric)1This standard is issued under the fixed designation A490M; the number immediately following the designation indicates the year oforiginal adoptio
2、n or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Sco
3、pe*1.1 This specification covers two types of quenched and tempered alloy steel, metric heavy hex structural bolts having a tensilestrength of 1040 to 1210 MPa.1.2 These bolts are intended for use in structural connections comparable to those covered under the requirements of theSpecification for St
4、ructural Joints Using ASTM A325 and A490 bolts, approved by the Research Council on StructuralConnections; endorsed by the American Institute of Steel Construction and by the Industrial Fastener Institute.21.3 The bolts are furnished in nominal bolt diameters M12 to M36, inclusive. They are designat
5、ed by type denoting chemicalcomposition as follows:Type DescriptionType 1 Medium carbon alloy steelType 2 Withdrawn in 2002Type 3 Weathering steel1.4 This specification is applicable to metric heavy hex structural bolts and alternate designs as established by the ResearchCouncil in its publication,
6、Specification for Structural Joints Using ASTM A325 and A490 bolts.1.5 For inch-pound bolts, see Specification A490.1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.7 The following safety hazards caveat pertains only to t
7、he Test Methods portion, Section 13, of this specification: Thisstandard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety and health practices and determine the applicability
8、of regulatory limitations priorto use.2. Referenced Documents2.1 ASTM Standards:3A325 Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile StrengthA490 Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile StrengthA490M Specification f
9、or High-Strength Steel Bolts, Classes 10.9 and 10.9.3, for Structural Steel Joints (Metric)A563M Specification for Carbon and Alloy Steel Nuts (Metric)A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel ProductsD3951 Practice for Commercial PackagingE384 Test Method for Knoo
10、p and Vickers Hardness of MaterialsE709 Guide for Magnetic Particle TestingE1444 Practice for Magnetic Particle TestingF436M Specification for Hardened Steel Washers (Metric)F568M Specification for Carbon and Alloy Steel Externally Threaded Metric Fasteners (Metric)1This specification is under the j
11、urisdiction of ASTM Committee F16 on Fasteners and is the direct responsibility of Subcommittee F16.02 on Steel Bolts, Nuts, Rivetsand Washers.Current edition approved Dec. 15, 2011. Published January 2012. Originally approved in 1982. Last previous edition approved in 2010 as A 490M101.DOI:10.1520/
12、A0490M-10E01.Current edition approved April 1, 2012. Published April 2012. Originally approved in 1982. Last previous edition approved in 2011 as A 490M 11. DOI:10.1520/A0490M-12.2Available from American Institute of Steel Construction (AISC), One E. Wacker Dr., Suite 700, Chicago, IL 60601-2001, ht
13、tp:/www.aisc.org3For referenced ASTM standards, visit the ASTM webbiest,website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page on the ASTM webbiest.website.1This document is not an
14、ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In
15、 all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes 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.F606M
16、Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, andRivets (Metric)F788/F788M Specification for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric SeriesF959M Specification for Compressible-Washer-Type Direct Tension I
17、ndicators for Use With Structural Fasteners (Metric)F1136M Specification for Zinc/Aluminum Corrosion Protective Coatings for Fasteners (Metric)F1470 Practice for Fastener Sampling for Specified Mechanical Properties and Performance InspectionF1789 Terminology for F16 Mechanical FastenersF2833 Specif
18、ication for Corrosion Protective Fastener Coatings with Zinc Rich Base Coat and Aluminum Organic/InorganicTypeF2328M Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts,Screws and Studs (Metric)G101 Guide for Estimating the Atmospheric Corrosio
19、n Resistance of Low-Alloy Steels2.2 ASME Standards:4B1.13M Metric Screw ThreadsB18.2.3.7M Metric Heavy Hex Structural Bolts4Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three Park Ave., New York, NY 10016-5990, http:/www.asme.org.TABLE 1 Chemical R
20、equirements for Type 1 BoltsAlloy SteelElement HeatAnalysis, %ProductAnalysis, %CarbonFor sizes through M30 0.300.48 0.280.50For size M36 0.350.53 0.330.55Manganese, min 0.60 0.57Phosphorus, max 0.040 0.045Sulfur, max 0.040 0.045Alloying ElementsAAAlloy Steel with Boron AdditionElement HeatAnalysis,
21、 %ProductAnalysis, %CarbonFor sizes through M30 0.30-0.48 0.28-0.50For size M36 0.35-0.53 0.35-0.55Manganese, min 0.60 0.57Phosphorus, max 0.040 0.045Sulfur, max 0.040 0.045Boron 0.0005-0.003 0.0005-0.003Alloying ElementsAAASteel, as defined by the American Iron and Steel Institute, shall be conside
22、redto be alloy when the maximum of the range given for the content of alloyingelements exceeds one or more of the following limits: Manganese, 1.65 %; silicon,0.60 %; copper, 0.60 % or in which a definite range or a definite minimum quantityof any of the following elements is specified or required w
23、ithin the limits of therecognized field of constructional alloy steels: aluminum, chromium up to 3.99 %,cobalt, columbium, molybdenum, nickel, titanium, tungsten, vanadium, zirconium,or any other alloying elements added to obtain a desired alloying effect.TABLE 2 Chemical Requirements for Type 3 Bol
24、tsElement Heat Analysis, % Product Analysis, %CarbonSizes M20 and smaller 0.200.53 0.190.55Sizes larger than M20. 0.300.53 0.280.55Manganese, min 0.40 0.37Phosphorus, max 0.035 0.040Sulfur, max 0.040 0.045Copper 0.200.60 0.170.63Chromium, min 0.45 0.42Nickel, minor0.20 0.17Molybdenum, min 0.15 0.14A
25、490M 122B18.24 Part Identifying Number (PIN) Code System Standard for B18 Fastener Products2.3 ISO Standards:47412 Hexagon Bolts for High Strength StructuralBolting With Large Width Across Flats (Short Thread Length)Product Grade CProperty Classes 8.8 and 10.92.4 IFI Standard5:IFI 144 Test Evaluatio
26、n Procedures for Coating Qualification Intended for Use on High-Strength Structural Bolts3. Terminology3.1 Terms used in this specification are defined in Terminology F1789, unless otherwise defined herein.4. Ordering Information4.1 Orders for bolts under this specification shall include the followi
27、ng (see Note 1):4.1.1 Quantity (number of pieces of bolts and accessories);4.1.2 Size, including nominal bolt diameter, thread pitch, and bolt length;4.1.3 Name of product: metric heavy hex structural bolts;4.1.4 Type of bolt (Type 1 or 3). When type is not specified, either Type 1 or Type 3 shall b
28、e furnished at the suppliers option;4.1.5 ASTM designation and year of issue;4.1.6 Other components such as nuts, washers, and washer-type direct tension indicators, if required;4.1.7 Certification, if required (see Section 16); and4.1.8 Protective Coating per Specification F1136M, Grade 3, if requi
29、red. See 5.3.4.1.9Special requirements, if required.4.1.10For establishment of a part identifying system, see ASME B18.244.1.9 Protective coating per Specification F2833, Grade 1 if required. See 4.3.4.1.10 Special requirements, if required.4.1.11 For establishment of a part identifying system, see
30、ASME B18.24.NOTE 1A typical ordering description follows: 1000 pieces M24 3 3 3 100 mm long, heavy hex structural bolt, Type 1, ASTM A 490 M 03; eachwith two hardened washers, ASTM F436M, Type 1; and one heavy hex nut, ASTM A563M, Grade DH.4.2 Recommended Nuts4.2.1 Nuts conforming to the requirement
31、s of Specification A563M are the recommended nuts for use with SpecificationA 490M heavy hex structural bolts. The nuts shall be of the class and have a surface finish for each type of bolt as follows.Bolt Type and Finish Nut Class and Finish1, plain (uncoated) A563M10S, 10S3, plain (uncoated)1, coa
32、ted in accordance withF1136M, Grade 3A563M10S, 10S3coated in accordance withF1136M, Grade 51, coated in accordance withF1136M, Grade 3 orF2833 Grade 1A563M10S, 10S3coated in accordance withF1136M, Grade 5 orF2833 Grade 13, weathering steel A563M10S3, weathering steel4.3 Recommended Washers4.3.1 Wash
33、ers conforming to Specification F436M are the recommended washers for use with Specification A490M heavy hexstructural bolts. The washers shall have a surface finish for each type of bolt as follows.Bolt Type and Finish Washer Finish1, plain (uncoated) plain (uncoated)1, coated in accordance withF11
34、36M, Grade 3coated in accordance withF1136M, Grade 31, coated in accordance withF1136M, Grade 3 orF2833 Grade 1coated in accordance withF1136M, Grade 3 orF2833 Grade 13, weathering steel weathering steel4.4 Other Accessories4.4.1 When compressible washer type tension indicators are specified to be u
35、sed with these bolts, they shall conform toSpecification F959M, Type 10.9.5Available from Industrial Fastener Institute (IFI), 6363 Oak Tree Boulevard, Independence, OH 44131, www.industrial-fasteners.org.A490M 1235. Materials and Manufacture5.1 Heat TreatmentType 1 and Type 3 bolts shall be heat tr
36、eated by quenching in oil from the austenitic temperature and thentempered by reheating to a temperature of not less than 425C.5.2 ThreadingThe threads shall be cut or rolled.5.3 Protective Coatings:5.3.1 When a protective coating is required and specified, the bolts shall be coated with Zinc/Alumin
37、um Corrosion ProtectiveCoatings in accordance with F1136M Grade 3, which has been qualified in accordance with IFI 144Grade 3 or F2833 Grade 1,which have been qualified in accordance with IFI 1446.5.3.2 No other metallic coatings are permitted unless authorized by Committee F16. Future consideration
38、 of any coating willbe based on a review of test results submitted to Committee F16 in accordance with the requirements of IFI 144.6. Chemical Composition6.1 Type 1 bolts shall be alloy steel conforming to the chemical composition requirements in Table 1. The steel shall containsufficient alloying e
39、lements to qualify it as an alloy steel (see Table 1, Footnote A).6.2 Type 3 bolts shall be weathering steel conforming to the chemical composition requirements in Table 2. See Guide G101for methods of estimating the atmospheric corrosion resistance of low alloy steel.6.3 Product analyses made on fi
40、nished bolts representing each lot shall conform to the product analysis requirements specifiedin Table 1 or Table 2, as applicable.6.4 Applications of heats of steel to which bismuth, selenium, tellurium, or lead has been intentionally added shall not bepermitted for bolts. Compliance with this req
41、uirement shall be based on a statement on the steel certificate indicating that theseelements were not intentionally added.6.5 Chemical analyses shall be performed in accordance with Test Methods, Practices, and Terminology A751.7. Mechanical Properties7.1 HardnessThe bolts shall conform to the hard
42、ness specified in Table 3.7.2 Tensile Properties:7.2.1 Except as permitted in 7.2.2 for long bolts and 7.2.3 for short bolts, nominal bolt diameters M24 and smaller having alength of 214 D and longer, and nominal bolt diameters larger than M24 having a length of 3D and longer shall be wedge testedfu
43、ll size and shall conform to the minimum and maximum wedge tensile load, and proof load or alternative proof load specifiedin Table 4. The load achieved during proof load testing shall be equal to or greater than the specified proof load.7.2.2 When the length of the bolt makes full-size testing impr
44、actical, machined specimens shall be tested and shall conform tothe requirements specified in Table 5. When bolts are tested by both full-size and machined specimen methods, the full-size testshall take precedence.7.2.3 Nominal bolt diameters M24 and smaller having a length shorter than 214 D down t
45、o 2D inclusive, which cannot be wedgetensile tested shall be axially tension tested full size and shall conform to the minimum tensile load and proof load or alternateproof load specified in Table 4. Nominal bolt diameters M24 and smaller having a length shorter than 2D which cannot be axiallytensil
46、e tested shall be qualified on the basis of hardness.7.2.4 For bolts on which both hardness and tension tests are performed, acceptance based on tensile requirements shall takeprecedence in the event of low hardness readings.8. Carburization/Decarburization8.1 DefinitionThis test is intended to eval
47、uate the presence or absence of carburization and decarburization as determined bythe difference in microhardness near the surface and core.8.2 Requirements:6Supporting data have been filed at ASTM International Headquarters and may be obtained by requesting Research Report RR:F161001.TABLE 3 Hardne
48、ss Requirements for Bolt SizesM12 to M36 InclusiveNominal BoltDiameter, mmLengthABrinell Rockwell Cmin max min maxM12 to M24, Less than 2D 311 352 33 38inclusive 2D and longer . . . 352 . . . 38Over M24 to M36, Less than 3D 311 352 33 38inclusive 3D and longer . . . 352 . . . 38AHeavy hex structural
49、 bolts M24 and smaller and shorter than 2D are subjectonly to minimum and maximum hardness. Heavy hex structural bolts larger thanM24 to M36 inclusive and shorter than 3D are subject only to minimum andmaximum hardness.A490M 1248.2.1 CarburizationThe bolts shall show no evidence of a carburized surface when evaluated in accordance with the hardnessmethods established in Test Method F2328M.8.2.2 DecarburizationHardness value differences shall not exceed the requirements set forth for decarburization in TestMethod F2328M materials.8.3 ProcedureTe
