ASTM_F_837M_-_02a_2015.pdf

Designation:F837M02a(Reapproved 2015)Standard Specification forStainless Steel Socket Head Cap Screws Metric1This standard is issued under the fixed designation F837M;the number immediately following the designation indicates the year oforiginal adoption 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.1.Scope1.1 This specification covers the chemical and mechanicalrequirements for stainless steel metric socket head cap screws(SHCS)with nominal thread M1.6 through M36 and intendedfor use in applications requiring general corrosion resistance.1.2 Two groups of stainless steel alloys are covered,auste-nitic Grade A1 and martensitic Grade C1.1.3 Four property classes are covered:austenitic A1-50 inan annealed condition at 585 MPa maximum;austeniticA155in a cold worked condition at 550 MPa minimum;austeniticA1-70 in a cold worked condition at 700 MPa minimum,andmartensitic C1-110 in a heat treated condition at 1100 MPaminimum.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 This hazard statement pertains only to Section 13,TestMethods:This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A262 Practices for Detecting Susceptibility to IntergranularAttack in Austenitic Stainless SteelsA342/A342M Test Methods for Permeability of WeaklyMagnetic MaterialsA380 Practice for Cleaning,Descaling,and Passivation ofStainless Steel Parts,Equipment,and SystemsA751 Test Methods,Practices,and Terminology for Chemi-cal Analysis of Steel ProductsA967 Specification for Chemical Passivation Treatments forStainless Steel PartsD3951 Practice for Commercial PackagingE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE92 Test Method for Vickers Hardness of Metallic Materials(Withdrawn 2010)3E384 Test Method for Knoop and Vickers Hardness ofMaterialsF606M Test Methods for Determining the Mechanical Prop-erties of Externally and Internally Threaded Fasteners,Washers,and Rivets(Metric)F738M Specification for Stainless Steel Metric Bolts,Screws,and Studs(Withdrawn 2014)3F1470 Practice for Fastener Sampling for Specified Me-chanical Properties and Performance Inspection2.2 ASME Standard:ASME B 18.3.1M Socket Head Cap Screws(Metric Series)43.Classification3.1 The designation of the property class for the twomaterials and conditions of this specification shall be consistentwith the stainless steel designations in Specification F738M.3.2 The austenitic stainless steel socket head cap screw shallbe designated F837M A1-50,F837M A1-55,or F837M A1-70.3.3 The martensitic stainless steel socket head cap screwshall be designated F837M C1-110.4.Ordering Information4.1 Orders for socket head cap screws under this specifica-tion shall include:4.1.1 Quantity(number of pieces of each item),4.1.2 Name of the item(socket head cap screws,SHCS),4.1.3 Size(nominal diameter,thread pitch,thread class,screw length)or part number,4.1.4 Property class(A1-50,A155,A1-70,or C1-110),4.1.5 ASTM specification and date of issue.When date ofissue is not specified,fasteners shall be furnished to the latestissue,1This specification is under the jurisdiction of ASTM Committee F16 onFasteners and is the direct responsibility of Subcommittee F16.04 on NonferrousFasteners.Current edition approved Sept.1,2015.Published November 2015.Originallypublished as F837M 83.Last previous edition approved in 2010 asF837M 02a(2010).DOI:10.1520/F0837M-02AR15.2For referenced 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.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from Global Engineering Documents,15 Inverness Way,EastEnglewood,CO 80112-5704,http:/.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.1.6 Supplementary requirements,if any(see S1 throughS3),4.1.7 Additional special requirements,if any,to be specifiedon the purchase order:4.1.7.1 Forming(see 5.1),4.1.7.2 Threading(see 5.2),4.1.7.3 Surface finish(see 11.1),4.1.7.4 Alloy selection(see 7.2),4.1.7.5 Test report(see 11.2),4.1.7.6 Additional testing(see section 12.3),4.1.7.7 Inspection(see 13.1),4.1.7.8 Rejection(see 14.1),and4.1.7.9 Certification(see 15.1).4.1.7.10 Special packaging requirements(see section18.1.2).5.Material and Manufacture5.1 ForgingUnless otherwise specified,screws in sizesM3 through M20 with lengths up to 10 times the nominalproduct diame