1、Designation: A325M 09A325M 13Standard Specification forStructural Bolts, Steel, Heat Treated 830 MPa MinimumTensile Strength (Metric)1This standard is issued under the fixed designation A325M; the number immediately following the designation indicates the year oforiginal adoption or, in the case of
2、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 U.S. Department of Defense.1 NOTESection 1.2 was
3、editorially corrected in June 2013.1. Scope*1.1 This specification2 covers two types of quenched and tempered, steel, metric heavy hex structural bolts having a minimumtensile strength of 830 MPa (Note 1).1.2 The bolts are intended for use in structural connections. These connections are comparable
4、to those covered under therequirements of the Specification for Structural Joints using ASTMUsing High-Strength A325 or Bolts, A490M bolts, approvedby the Research Council on Structural Connections; endorsed by theAmerican Institute of Steel Construction and by the IndustrialFastener Institute.1.3 T
5、he bolts are furnished in sizes M12 to M36 inclusive. They are designated by type denoting chemical composition asfollows:1.3.1 Type 1Medium-carbon, carbon boron, medium carbon alloy, or alloy boron steel.1.3.2 Type 2Withdrawn in 2003.1.3.3 Type 3Weathering Steel.1.4 This specification is applicable
6、 to metric heavy hex, structural bolts only.1.5 Terms used in this specification are defined in Terminology F1789.1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.NOTE 1This specification is the metric companion to the inch
7、 pound Specification A325.1.7 The following safety hazard caveat pertains only to the test methods portion, Section 10, of this specification. This standarddoes not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of thisstandard to
8、 establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:3A153/A153M Specification for Zinc Coating (Hot-Dip) on Iron and Steel HardwareA490M Specification for High-Strength Steel Bolts, Classe
9、s 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 ProductsB695 Specification for Coatings of Zinc Mechanically Deposited on Iron and SteelD3951 Practice for C
10、ommercial PackagingF436M Specification for Hardened Steel Washers (Metric)F606M Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, andRivets (Metric)1 This specification is under the jurisdiction of ASTM Committee F16 on Fasteners and is
11、the direct responsibility of Subcommittee F16.02 on Steel Bolts, Nuts, Rivetsand Washers.Current edition approved Jan. 1, 2009Feb. 15, 2013. Published January 2009March 2013. Originally approved in 1979. Last previous edition approved in 20082009 asA325M 08A325M 09 . DOI: 10.1520/A0325M-09.10.1520/A
12、0325M-13.2 For ASME Boiler and Pressure Vessel Code applications, see related Specification SA-325M in Section II of that Code.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information,
13、 refer to the standards Document Summary page on the ASTM website.This document is not an 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 al
14、l changes accurately, ASTM recommends that users consult prior editions as appropriate. In 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 standardCopyright ASTM International, 1
15、00 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1F788/F788M Specification for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric SeriesF959M Specification for Compressible-Washer-Type Direct Tension Indicators for Use With Structural Fasteners (Met
16、ric)F1136M Specification for Zinc/Aluminum Corrosion Protective Coatings for Fasteners (Metric) (Withdrawn 2011)4F1470 Practice for Fastener Sampling for Specified Mechanical Properties and Performance InspectionF1789 Terminology for F16 Mechanical FastenersG101 Guide for Estimating the Atmospheric
17、Corrosion Resistance of Low-Alloy Steels2.2 ASME Standards:5B 1.13M Metric Screw ThreadsB 18.2.3.7M Metric Heavy Hex Structural BoltsB 18.18.3M Inspection and Quality Assurance for Special Purpose FastenersB 18.24 Part Identifying Number (PIN) Code System Standard for B18 Fastener Products2.3 RCSC S
18、tandard:6Specification for Structural Joints Using High-Strength Bolts3. Ordering Information3.1 Orders for heavy hex structural bolts under this specification shall include the following:3.1.1 Quantity (number of pieces of bolts and accessories).3.1.2 Size, including nominal bolt diameter, thread p
19、itch and bolt length.3.1.3 Name of product, heavy hex structural bolts.3.1.4 When bolts threaded full length are required, Supplementary Requirement S1 shall be specified.3.1.5 Type of bolt; Type 1 or Type 3. When the type is not specified, either Type 1 or Type 3 shall be furnished at the suppliers
20、option.3.1.6 ASTM designation and year of issue.3.1.7 Other components such as nuts, washers, and compressible washer-type direct-tension indicators, if required.3.1.8 Zinc CoatingSpecify the zinc-coating process required, for example, hot-dip, mechanically deposited, Zinc AluminiumCorrosion Protect
21、ive Coating or no preference (see 4.3).3.1.9 Other FinishesSpecify other protective finish, if required.3.1.10 Test reports, if required (see Section 13).3.1.11 Supplementary or special requirements, if required.3.1.12 For establishment of a part identifying system, see ASME B18.24.NOTE 2A typical o
22、rdering description follows: 1000 pieces, M243100, heavy hex structural bolts, Type 1 ASTM A325M - 03, each with onehardened washer and one heavy hex nut, mechanically deposited zinc coating (see 3.1.8 for any special requirements).3.2 Recommended Nuts:3.2.1 Nuts conforming to the requirements of Sp
23、ecification A563M are the recommended nuts for use with A325M metricheavy 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 Finish Specification1, plain (noncoated) A563M8S or 8S3, plain1, zinc-coated A5
24、63M10S, zinc-coated1, coated in accordance withSpecification F1136M, Grade 3A563M10S coated in accordance withSpecification F1136M, Grade 53, plain A563M8S3, plain3.3 Recommended Washers:3.3.1 Washers conforming to Specification F436M are the recommended washers for use with Specification A325M Metr
25、icheavy hex structural 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, zinc-coated zinc-coated1, coated in accordance withSpecification F1136M,Grade 3coated in accordance withSpecification F1136M
26、3, plain weathering steel, plain4 The last approved version of this historical standard is referenced on www.astm.org.5 Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three Park Ave., New York, NY 10016-5990, http:/www.asme.org.6 Available from Ameri
27、can Institute of Steel Construction (AISC), One E. Wacker Dr., Suite 700, Chicago, IL 60601-2001, http:/www.aisc.org.A325M 1323.4 Other Accessories:3.4.1 When compressible washer type direct tension indicators are specified to be used with these bolts, they shall conform tothe requirements in Specif
28、ication F959M Type 8.8.4. Materials and Manufacture4.1 Heat Treatment:4.1.1 Type 1 bolts produced from medium carbon steel shall be quenched in a liquid medium from the austenitizing temperature.4.1.2 Type 1 bolts produced from carbon steel to which chromium, nickel, molybdenum, or boron were intent
29、ionally added shallbe quenched only in oil from the austenitizing temperature.4.1.3 Type 3 bolts shall be quenched only in oil from the austenitizing temperature.4.1.4 Type 1 bolts, regardless of the steel used, and Type 3 bolts, shall be tempered by reheating to not less than 427C.4.2 ThreadingThre
30、ads shall be cut or rolled.4.3 Zinc Coatings, Hot-dip and Mechanically Deposited and Zinc/Aluminum Corrosion Protective Coating:4.3.1 When zinc-coated fasteners are required, the purchaser shall specify the zinc coating process, for example, hot dip,mechanically deposited, Zinc/Aluminum Corrosion Pr
31、otective Coating, or no preference.4.3.2 When hot-dip is specified, the fasteners shall be zinc-coated by the hot-dip process and the coating shall conform to thecoating weight/thickness and performance requirements of Class C of Specification A153/A153M.TABLE 1 Chemical Requirements for Type 1 Bolt
32、sElement Carbon SteelHeatAnalysisProductAnalysisCarbon 0.300.52 0.280.55Manganese, min 0.60 0.57Phosphorus, max 0.040 0.048Sulfur, max 0.050 0.058Silicon 0.150.30 0.130.32Element Carbon Boron SteelHeatAnalysisProductAnalysisCarbon 0.300.52 0.280.55Manganese, min 0.60 0.57Phosphorus, max 0.040 0.048S
33、ulfur, max 0.050 0.058Silicon 0.100.30 0.080.32Boron 0.00050.003 0.00050.003Element Alloy SteelHeatAnalysisProductAnalysisCarbon 0.300.52 0.280.55Manganese, min 0.60 0.57Phosphorus, max 0.035 0.040Sulfur, max 0.040 0.045Silicon 0.150.35 0.130.37Alloying Elements A AAlloy Boron SteelHeatAnalysisProdu
34、ctAnalysisCarbon 0.300.52 0.280.55Manganese, min 0.60 0.57Phosphorus, max 0.035 0.040Sulfur, max 0.040 0.045Silicon 0.150.35 0.130.37Boron 0.00050.003 0.00050.003Alloying Elements A AA Steel, as defined by theAmerican Iron and Steel Institute, shall be considered tobe alloy when the maximum of the r
35、ange given for the content of alloying elementsexceeds 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 quantity of anyof the following elements is specified or required within the limits of the recognizedfield
36、of constructional alloy steels: aluminum, chromium up to 3.99 %, cobalt,columbium, molybdenum, nickel, titanium, tungsten, vanadium, zirconium, or anyother alloying elements added to obtain a desired alloying effect.A325M 1334.3.3 When mechanically deposited is specified, the fasteners shall be zinc
37、-coated by the mechanical deposition process and thecoating shall conform to the coating weight/thickness and performance requirements of Class 55 of Specification B695.4.3.4 When Zinc/Aluminum Corrosion Protective Coating is specified, the coating shall conform to the coating weight/thicknessand pe
38、rformance requirements of Grade 3 of Specification F1136M.4.3.5 When no preference is specified, the supplier shall furnish either a hot-dip zinc coating in accordance with SpecificationA153/A153M, Class C, or a mechanically deposited zinc coating in accordance with Specification B695, Class 55, or
39、aZinc/Aluminum Corrosion Protective Coating in accordance with Specification F1136M, Grade 3.Threaded components (bolts andnuts) shall be coated by the same zinc-coating process and the suppliers option is limited to one process per item with no mixedprocesses in a lot.4.4 LubricationWhen zinc coate
40、d nuts are ordered with the bolts, the nuts shall be lubricated in accordance with SpecificationA563M, Supplementary Requirement S1, to minimize galling.4.5 Secondary Processing:4.5.1 If any processing, which can affect the mechanical properties or performance of the bolts is performed after the ini
41、tialtesting, the bolts shall be retested for all specified mechanical properties and performance requirements affected by thereprocessing.4.5.2 When the secondary process is heat treatment, the bolts shall be tested for all specified mechanical properties. Hot dip zinccoated bolts shall be tested fo
42、r all specified mechanical properties and rotational capacity. If zinc coated nuts are relubricated afterthe initial rotational capacity tests, the assemblies shall be retested for rotational capacity. See 10.2, Note 3.TABLE 2 Chemical Requirements for Type 3 Heavy Hex Structural BoltsAElementCompos
43、ition, %Type 3 BoltsAA B C D E FCarbon:Heat analysisProduct analysis0.330.400.310.420.380.480.360.500.150.250.140.260.150.250.140.260.200.250.180.270.200.250.190.26Manganese:Heat analysisProduct analysis0.901.200.861.240.700.900.670.930.801.350.761.390.401.200.361.240.601.000.561.040.901.200.861.24P
44、hosphorus:Heat analysisProduct analysis0.035 max0.040 max0.060.120.060.1250.035 max0.040 max0.035 max0.040 max0.035 max0.040 max0.035 max0.040 maxSulfur:Heat analysisProduct analysis0.040 max0.045 max0.040 max0.045 max0.040 max0.045 max0.040 max0.045 max0.040 max0.045 max0.040 max0.045 maxSilicon:He
45、at analysisProduct analysis0.150.350.130.370.300.500.250.550.150.350.130.370.250.500.200.550.150.350.130.370.150.350.130.37Copper:Heat analysisProduct analysis0.250.450.220.480.200.400.170.430.200.500.170.530.300.500.270.530.300.600.270.630.200.400.170.43Nickel:Heat analysisProduct analysis0.250.450
46、.220.480.500.800.470.830.250.500.220.530.500.800.470.830.300.600.270.630.200.400.170.43Chromium:Heat analysisProduct analysis0.450.650.420.680.500.750.470.830.300.500.270.530.501.000.451.050.600.900.550.950.450.650.420.68Vanadium:Heat analysisProduct analysisBBBB0.020 min0.010 minBBBBBBMolybdenum:He
47、at analysisProduct analysisBB0.06 max0.07 maxBB0.10 max0.11 maxBBBBTitanium:Heat analysisProduct analysisBBBBBB0.05 max0.06 maxBBBBA A, B, C, D, E, and F are classes of material used for Type 3 bolts. Selection of a class shall be at the option of the bolt manufacturer.B These elements are not speci
48、fied or required.A325M 1345. Chemical Composition5.1 Type 1 bolts shall be plain carbon steel, carbon boron steel, alloy steel, or alloy boron steel at the manufacturers option,conforming to the chemical composition specified in Table 1.5.2 Type 3 bolts shall be weathering steel and shall conform to
49、 one of the chemical compositions specified in Table 2. Theselection of the chemical composition, A, B, C, D, E, or F, shall be at the option of the bolt manufacturer. See Guide G101 formethods of estimating the atmospheric corrosion resistance of low alloy steels.5.3 Product analyses made on finished bolts representing each lot shall conform to the product analysis requirements specifiedin Table 1 or Table 2, as applicable.5.4 Heats of steel to which bismuth,
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