1、Designation:F 738M 02METRICStandard Specification forStainless Steel Metric Bolts,Screws,and Studs1This standard is issued under the fixed designation F 738M;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A
2、 number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)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.Scope1.1 This specification covers the chemical and mechanicalreq
3、uirements for stainless steel metric bolts,screws,and studswith nominal thread diameters M1.6 through M36 and isintended for use in engineering applications requiring generalcorrosion resistance.1.2 Eight groups of stainless steel alloys are covered,including three austenitic(GradesA1,A2,andA4),one
4、ferritic(Grade F1),three martensitic(Grades C1,C3,and C4),and oneprecipitation hardening(Grade P1).1.3 Twenty property classes are covered,including nineaustenitic,two ferritic,eight martensitic,and one precipitationhardening.The property classes with the permissible alloys foreach are listed in Tab
5、le 1.1.4 This specification is based in concept and content onISO 3506.The chemical and mechanical requirements speci-fied for all property classes,except as given in 1.4.1,areessentially identical with classes of the same designation inISO 3506.1.4.1 This specification includes all of the property
6、classescovered in ISO 3506.Additionally,it includes property classesA1-70,A2-70,A4-70,A1-80,A2-80,and A4-80 for productswith nominal thread diameters larger than M20;and fournon-ISO property classes,C1-110,C4-110,C3-120;and P1-90.1.5 Supplementary requirements of an optional nature areprovided,appli
7、cable only when agreed upon between themanufacturer and the purchaser at the time of the inquiry andorder.1.6 Suitable nuts for use with bolts,screws,and studsincluded in this specification are covered by SpecificationF 836M.1.7The following safety hazards caveat pertains only tothe test method desc
8、ribed in this specification.This standarddoes not purport to address the safety problems associated withits use.It is the responsibility of the user of this standard toestablish appropriate safety and health practices and deter-mine the applicability of regulatory limitations prior to use.2.Referenc
9、ed Documents2.1 ASTM Standards:A 276 Specification for Stainless Steel Bars and Shapes2A 342/A 342M Test Methods for Permeability of FeeblyMagnetic Materials3A 380 Practice for Cleaning,Descaling,and Passivation ofStainless Steel Parts,Equipment,and Systems2A 484/A 484M Specification for General Req
10、uirements forStainless Steel Bars,Billets,and Forgings2A 493 Specification for Stainless Steel Wire and Wire Rodsfor Cold Heading and Cold Forging2A 555/A 555M Specification for General Requirements forStainless Steel Wire and Wire Rods2A 564/A564M Specification for Hot-Rolled and Cold-Finished Age-
11、Hardening Stainless Steel Bars and Shapes3A 582/A 582M Specification for Free-Machining StainlessSteel Bars3A 751 Test Methods,Practices,and Terminology forChemical Analysis of Steel Products2D 3951 Practice for Commercial Packaging4E 29 Practice for Using Significant Digits in Test Data toDetermine
12、 Conformance with Specifications5E 353 Test Methods for Chemical Analysis of Stainless,Heat-Resisting,Maraging,and Other Similar Chromium-Nickel-Iron Alloys6F 606M Test Methods for Determining the MechanicalProperties of Externally and Internally Threaded Fasteners,Washers,and Rivets Metric7F 836M S
13、pecification for Style 1 Stainless Steel MetricNuts71This specification is under the jurisdiction of ASTM Committee F16 onFasteners and is the direct responsibility of Subcommittee F16.04 on NonferrousFasteners.Current edition approved April 10,2002.Published May 2002.Originallypublished as F 738 81
14、.Last previous edition F 738M 01.2Annual Book of ASTM Standards,Vol 01.03.3Annual Book of ASTM Standards,Vol 03.04.4Annual Book of ASTM Standards,Vol 15.09.5Annual Book of ASTM Standards,Vol 14.02.6Annual Book of ASTM Standards,Vol 03.05.7Annual Book of ASTM Standards,Vol 01.08.1Copyright ASTM Inter
15、national,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.F 1470 Guide for Fastener Sampling for Specified Mechani-cal Properties and Performance Inspection72.2ISO Standard:ISO 3506 Corrosion-Resistant Stainless Steel Fasteners83.Classification3.1 The designation of ea
16、ch property class is composed ofthree parts:a letter,followed by a single digit,followed byeither two or three digits.3.1.1 The letter indicates the general composition type ofstainless steel as follows:3.1.1.1 A for austenitic steels,3.1.1.2 F for ferritic steels,3.1.1.3 C for martensitic steels,and3.1.1.4 P for precipitation-hardening steel.3.1.2 The first digit(1,2,3,or 4)indicates the alloy group.The permissible alloys within each group are given in Table 1.3.1.3 The last two or three digits