Standard Specification for Alloy-Steel and …

1 Designation: A193/A193M 10aStandard Specification forAlloy- steel and stainless steel Bolting for High Temperatureor High Pressure Service and Other Special PurposeApplications1 This Standard is issued under the fixed designation A193/A193M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last superscript epsilon ( ) indicates an editorial change since the last revision or Standard has been approved for use by agencies of the Department of Scope* This specification2covers alloy and stainless steel bolt-ing for pressure vessels, valves, flanges, and fittings for hightemperature or high pressure service, or other special purposeapplications. See SpecificationA962/A962 Mfor the definitionof bolting.

2 Bars and wire shall be hot-wrought and may befurther processed by centerless grinding or by cold stainless steel may be carbide solution treated orcarbide solution treated and strain-hardened. When strainhardened austenitic steel is ordered, the purchaser should takespecial care to ensure thatAppendix X1is thoroughly Several grades are covered, including ferritic steels andaustenitic stainless steels designated B5, B8, and so will depend upon design, service conditions, me-chanical properties, and high temperature The following referenced general requirements are in-dispensable for application of this specification: SpecificationA962 The committee formulating this specification has includedfifteen steel types that have been rather extensively used for the presentpurpose. Other compositions will be considered for inclusion by thecommittee from time to time as the need becomes For grades of Alloy-Steel bolting suitable for use at the lowerrange of high temperature applications, reference should be made For grades of Alloy-Steel bolting suitable for use in lowtemperature applications, reference should be made to SpecificationA320 Nuts for use with bolting are covered in Supplementary Requirements are provided for use at theoption of the purchaser.

3 The supplementary requirements shallapply only when specified in the purchase order or This specification is expressed in both inch-pound unitsand in SI units; however, unless the purchase order or contractspecifies the applicableMspecification designation (SI units),the inch-pound units shall The values stated in either SI units or inch-pound unitsare to be regarded separately as Standard . Within the text, theSI units are shown in brackets. The values stated in eachsystem may not be exact equivalents; therefore, each systemshall be used independently of the other. Combining valuesfrom the two systems may result in non-conformance with Referenced standards :3A153/A153 MSpecification for Zinc Coating (Hot-Dip) onIron and steel HardwareA194/A194 MSpecification for Carbon and Alloy SteelNuts for Bolts for High Pressure or High TemperatureService, or BothA320/A320 MSpecification for Alloy-Steel and StainlessSteel Bolting for Low-Temperature ServiceA354 Specification for Quenched and Tempered Alloy SteelBolts, Studs, and Other Externally Threaded FastenersA788/A788 MSpecification for steel Forgings, General Re-quirementsA962/A962 MSpecification for Common Requirements forBolting Intended for Use at Any Temperature from Cryo-genic to the Creep RangeB633 Specification for Electrodeposited Coatings of Zincon Iron and Steel1 This specification is under the jurisdiction of ASTM CommitteeA01on steel .

4 stainless steel and Related alloys and is the direct responsibility of steel Forgings and Wrought Fittings for Piping Applications and BoltingMaterials for Piping and Special Purpose edition approved May 15, 2010. Published June 2010. Originallyapproved in 1936. Last previous edition approved in 2010 as A193/A193M : ASME Boiler and Pressure Vessel Code applications, see related Specifi-cation SA-193 in Section II of that referenced ASTM standards , visit the ASTM website, , orcontact ASTM Customer Service at ForAnnual Book of ASTMS tandardsvolume information, refer to the Standard s Document Summary page onthe ASTM *A Summary of Changes section appears at the end of this ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United for Coatings of Zinc Mechanically De-posited on Iron and SteelB696 Specification for Coatings of Cadmium MechanicallyDepositedB766 Specification for Electrodeposited Coatings of Cad-miumE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE21 Test Methods for Elevated Temperature Tension Testsof Metallic MaterialsE112 Test Methods for Determining Average Grain SizeE139 Test Methods for Conducting Creep, Creep-Rupture.

5 And Stress-Rupture Tests of Metallic MaterialsE150 Recommended Practice for Conducting Creep andCreep-Rupture Tension Tests of Metallic Materials UnderConditions of Rapid Heating and Short Times4E151 Recommended Practice for Tension Tests of MetallicMaterials at Elevated Temperatures with Rapid Heatingand Conventional or Rapid Strain Rates4E292 Test Methods for Conducting Time-for-RuptureNotch Tension Tests of MaterialsE328 Test Methods for Stress Relaxation for Materials andStructuresE566 Practice for Electromagnetic (Eddy-Current) Sortingof Ferrous MetalsE709 Guide for Magnetic Particle TestingF606 Test Methods for Determining the Mechanical Prop-erties of Externally and Internally Threaded Fasteners,Washers, Direct Tension Indicators, and RivetsF1940 Test Method for Process Control Verification toPrevent Hydrogen Embrittlement in Plated or CoatedFastenersF1941 Specification for Electrodeposited Coatings onThreaded Fasteners (Unified Inch Screw Threads (UN/UNR))F2329 Specification for Zinc Coating, Hot-Dip, Require-ments for Application to Carbon and Alloy steel Bolts,Screws, Washers, Nuts, and Special Threaded and Hex Bolts and Hex Cap Socket and Spline Socket Socket Head Cap Standard :6 AIAG B-5 Primary Metals Identification Tag Appli-cation Standard3.

6 General Requirements and Ordering The inquiry and orders shall include the following, asrequired, to describe the desired material Heat-treated condition (that is carbide solution treated(Class 1), carbide solution treated after finishing (Class 1A),and carbide solution treated and strain-hardened (Classes 2, 2 Band 2C), for the austenitic stainless steels; Classes 1B and 1 Capply to the carbide solution-treated nitrogen-bearing stainlesssteels; Class 1D applies to material carbide solution treated bycooling rapidly from the rolling temperature), Description of items required (that is, bars, bolts,screws, or studs), Nuts, if required by purchaser, in accordance , Supplementary requirements, if any, Special requirements, in accordance , , , , Coatings are prohibited unless specified bythe purchaser (See Supplementary Requirements S13 and S14).

7 When coated fasteners are ordered the purchaser should takespecial care to ensure thatAppendix X2is thoroughly Common Bolting supplied to this specification shall conform tothe requirements of SpecificationA962/A962M. These require-ments include test methods, finish, thread dimensions, macro-etch (alloy steels only), marking, certification, optional supple-mentary requirements, and others. Failure to comply with therequirements of SpecificationA962/A962 Mconstitutes non-conformance with this specification. In case of conflict be-tween this specification and SpecificationA962/A962M, thisspecification shall Manufacture (Process) The steel shall be produced by any of the followingprocesses: open-hearth, basic-oxygen, electric-furnace, orvacuum-induction melting (VIM). The molten steel may bevacuum-treated prior to or during pouring of the ingot or See SpecificationA962/A962 Mfor A sufficient discard shall be made to secure freedomfrom injurious piping and undue Heat Ferritic steels shall be allowed to cool to a temperaturebelow the cooling transformation range immediately afterrolling or forging.

8 Materials shall then be uniformly reheated tothe proper temperature to refine the grain (a group thusreheated being known as aquenching charge), quenched in aliquid medium under substantially uniform conditions for eachquenching charge, and tempered. The minimum temperingtemperature shall be as specified inTables 2 and The last approved version of this historical Standard is referencedon from American Society of Mechanical Engineers (ASME), ASMEI nternational Headquarters, Three Park Ave., New York, NY 10016-5990, from Automotive Industry Action Group (AIAG), 26200 Lahser Rd.,Suite 200, Southfield, MI 48033, 10a2 TABLE 1 Chemical Requirements (Composition, percent) (410)RangeProduct Variation,RangeProduct VariationOver or UnderBOver or overManganese, overPhosphorus, overSulfur.

9 , Variation,Product Variation,RangeOver or UnderBRangeOver or , overSulfur, .. , max % Steels,FClasses 1, 1A, 1D, and 2 Grade ..B8, B8AB8C, B8 CAB8M, B8MA, B8M2, B8M3B8P, B8 PAUNS (304)S34700 (347)S31600 (316)S30500 RangeProduct Variation,Over or UnderBRangeProduct Variation,Over or UnderBRangeProduct Variation,Over or UnderBRangeProduct Variation,Over or UnderBCarbon, overManganese, overPhosphorus, overSulfur, overSilicon, ..Columbium +..10 x carbon under..tantalumcontent, min; Steels,FClasses 1A, 1B, 1D, and , B8 NAB8MN, B8 MNAB8 MLCuN, B8 MLCuNAUNS (304N)S31651 (316N)S31254 RangeProduct Variation,Over or UnderBRangeProduct Variation,Over or UnderBRangeProduct Variation,Over or UnderBCarbon, overManganese, overPhosphorus, overSulfur, overSilicon.

10 A193/A193M 10a3 TABLE SteelsF, Classes 1, 1A, and ,B8 TAUNS (321)RangeProduct Variation,Over or UnderBCarbon, overManganese, overPhosphorus, overSulfur, overSilicon, x (C + N) min, max..TypeAustenitic SteelsF, Classes 1C and 1 DGradeB8R, B8 RAB8S, B8 SAUNS DesignationS20910S21800 RangeProduct Variation,Over or UnderBRangeProduct Variation,Over or UnderBCarbon, , overSulfur, .. + ..TypeAustenitic SteelsF, Classes 1, 1A and 1 DGradeB8LN, B8 LNAB8 MLN, B8 MLNAUNS DesignationS30453S31653 RangeProduct Variation,Over or UnderBRangeProduct Variation,Over or UnderBCarbon, overPhosphorus, overSulfur, .. intentional addition of Bi, Se, Te, and Pb is not analysis Individual determinations sometimes vary from the specified limits on ranges as shown in the tables.