1、Designation: A600 92a (Reapproved 2016)Standard Specification forTool Steel High Speed1This standard is issued under the fixed designation A600; 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
2、 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. Scope1.1 This specification covers tungsten-type andmolybdenum-type
3、 high-speed steels available as annealed,hot-rolled bars, forgings, plate, sheet, or strip, and annealed,cold-finished bars or forgings used primarily in the fabricationof tools.1.2 Seven types of tungsten high-speed tool steels desig-nated T1, T2, etc., seventeen types of molybdenum high-speedtool
4、steels designated M1, M2, etc., and two intermediate highspeed steels designated as M50 and M52 are covered. Selectionwill depend upon design, service conditions, and mechanicalproperties.1.3 The term “high-speed steel” is described and its mini-mum requirements are covered in the Annex.1.4 The valu
5、es stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2. Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for Mechanical Testi
6、ngof Steel ProductsA388/A388M Practice for Ultrasonic Examination of SteelForgingsA561 Practice for Macroetch Testing of Tool Steel BarsA700 Guide for Packaging, Marking, and Loading Methodsfor Steel Products for ShipmentE3 Guide for Preparation of Metallographic SpecimensE30 Test Methods for Chemic
7、alAnalysis of Steel, Cast Iron,Open-Hearth Iron, and Wrought Iron (Withdrawn 1995)3E45 Test Methods for Determining the Inclusion Content ofSteelE59 Practice for Sampling Steel and Iron for Determinationof Chemical Composition (Withdrawn 1996)32.2 Military Standard:MIL-STD-163 Steel Mill Products, P
8、reparation for Ship-ment and Storage42.3 Federal Standards:Fed. Std. No. 123 Marking for Shipment (Civil Agencies)4Fed. Std. No. 183 Continuous Identification Marking of Ironand Steel Products43. Classification3.1 Material in accordance with this specification is classi-fied by chemical composition.
9、 Types correspond to respectiveAISI designations.3.1.1 Types T1, T2, T4, T5, T6, T8, and T15 are character-ized by a controlled high tungsten content along with otheralloying elements.3.1.2 Types M1, M2, M3, M4, M6, M7, M10, M30, M33,M34, M36, M41, M42, M43, M44, M46, M47, M48, and M62are characteri
10、zed by a controlled high molybdenum contentalong with other alloying elements.3.1.3 Types M2, M3, and M10 are further classified accord-ing to carbon range. Type M3 is further classified according tovanadium range.3.1.4 Types M50 and M52 are considered intermediate highspeed steels in view of their
11、lower total alloy content than thestandard types. These leaner alloy grades normally are limitedto less severe service conditions.4. Ordering Information4.1 Orders for material under this specification shall includethe following information, as required to describe adequatelythe desired material:4.1
12、.1 Name of material (high-speed tool steel),4.1.2 Type,1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.29 on Tool Steels.Current edition approved March 1, 2016. Published June 2016. Or
13、iginallyapproved in 1969. Last previous edition approved in 2010 as A600 92a (2010).DOI: 10.1520/A0600-92AR16.2For 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 st
14、andards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from DLA Document Services, Building 4/D, 700 Robbins Avenue,Philadelphia, PA 19111-5094, http:/quicksearch.dla.mil.Copyright ASTM International, 100 Barr H
15、arbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.1.3 Shape (sheet, strip, plate, flat bar, round bar, squarebar, hexagon bar, octagon, special shapes),4.1.4 Dimensions (thickness, width, diameter, length). (Forcoils, include the minimum inside diameter or inside diameterra
16、nge, the maximum outside diameter, and maximum orminimum coil weight if required. (Minimum coil weights aresubject to negotiation.),4.1.5 Finish (hot rolled, forged, blasted or pickled, colddrawn, rough machined, ground, precision ground andpolished),4.1.6 Condition (annealed),4.1.7 ASTM designation
17、 and date of issue, and4.1.8 Special or supplementary requirements.5. Materials and Manufacture5.1 Unless otherwise specified, material covered by thisspecification shall be made by an electric melting process.6. Chemical Composition6.1 An analysis of each heat of steel shall be made by themanufactu
18、rer to determine the percentage of the elementsspecified and these values shall conform to the requirements asto chemical composition specified in Table 1. If requested orrequired, the chemical composition shall be reported to thepurchaser or his representative.6.2 Analysis may be made by the purcha
19、ser from finishedbars and forgings by machining off the entire cross section anddrilling parallel to the axis of the bar or forging at any pointmidway between the center and surface in accordance with thelatest issue of Practice E59. The chemical analysis of thedrilling chips shall be made in accord
20、ance with the latest issueof Test Methods E30. The chemical composition thus deter-mined shall not vary from the limits specified in Table 1.7. Hardness Requirements7.1 Annealed hardness values when obtained in accordancewith the latest issue of Test Methods and Definitions A370shall not exceed the
21、Brinell hardness values (or equivalentRockwell hardness values) specified in Table 2.7.2 Specimens for determination of minimum response tohardening shall be14-in. (6.4-mm) thick disks cut so as torepresent either the full cross-sectional area or that midwaybetween the center and outer surface of th
22、e material. If theTABLE 1 Chemical Requirements, %AUNSDesigna-tionBType Carbon Manganese Phos-phorusSulfurCSilicon Chromium Vanadium Tungsten Molybdenum Cobaltmin max min max max max min max min max min max min max min max min maxTungsten-Type High-Speed SteelsT12001 T1 0.65 0.80 0.10 0.40 0.03 0.03
23、 0.20 0.40 3.75 4.50 0.90 1.30 17.25 18.75 . . . . . . . . . . . .T12002 T2 0.80 0.90 0.20 0.40 0.03 0.03 0.20 0.40 3.75 4.50 1.80 2.40 17.50 19.00 . . . 1.00 . . . . . .T12004 T4 0.70 0.80 0.10 0.40 0.03 0.03 0.20 0.40 3.75 4.50 0.80 1.20 17.50 19.00 0.40 1.00 4.25 5.75T12005 T5 0.75 0.85 0.20 0.40
24、 0.03 0.03 0.20 0.40 3.75 5.00 1.80 2.40 17.50 19.00 0.50 1.25 7.00 9.50T12006 T6 0.75 0.85 0.20 0.40 0.03 0.03 0.20 0.40 4.00 4.75 1.50 2.10 18.50 21.00 0.40 1.00 11.00 13.00T12008 T8 0.75 0.85 0.20 0.40 0.03 0.03 0.20 0.40 3.75 4.50 1.80 2.40 13.25 14.75 0.40 1.00 4.25 5.75T12015 T15 1.50 1.60 0.1
25、5 0.40 0.03 0.03 0.15 0.40 3.75 5.00 4.50 5.25 11.75 13.00 . . . 1.00 4.75 5.25Molybdenum-Type High-Speed SteelsT11301 M1 0.78 0.88 0.15 0.40 0.03 0.03 0.20 0.50 3.50 4.00 1.00 1.35 1.40 2.10 8.20 9.20 . . . . . .T11302 M2 regular C 0.78 0.88 0.15 0.40 0.03 0.03 0.20 0.45 3.75 4.50 1.75 2.20 5.50 6.
26、75 4.50 5.50 . . . . . .high C 0.95 1.05 0.15 0.40 0.03 0.03 0.20 0.45 3.75 4.50 1.75 2.20 5.50 6.75 4.50 5.50 . . . . . .T11313 M3 Class 1 1.00 1.10 0.15 0.40 0.03 0.03 0.20 0.45 3.75 4.50 2.25 2.75 5.00 6.75 4.75 6.50 . . . . . .T11323 Class 2 1.15 1.25 0.15 0.40 0.03 0.03 0.20 0.45 3.75 4.50 2.75
27、 3.25 5.00 6.75 4.75 6.50 . . . . . .T11304 M4 1.25 1.40 0.15 0.40 0.03 0.03 0.20 0.45 3.75 4.75 3.75 4.50 5.25 6.50 4.25 5.50 . . . . . .T11306 M6 0.75 0.85 0.15 0.40 0.03 0.03 0.20 0.45 3.75 4.50 1.30 1.70 3.75 4.75 4.50 5.50 11.00 13.00T11307 M7 0.97 1.05 0.15 0.40 0.03 0.03 0.20 0.55 3.50 4.00 1
28、.75 2.25 1.40 2.10 8.20 9.20 . . . . . .T11310 M10regular C 0.84 0.94 0.10 0.40 0.03 0.03 0.20 0.45 3.75 4.50 1.80 2.20 . . . . . . 7.75 8.50 . . . . . .high C 0.95 1.05 0.10 0.40 0.03 0.03 0.20 0.45 3.75 4.50 1.80 2.20 . . . . . . 7.75 8.50 . . . . . .T11330 M30 0.75 0.85 0.15 0.40 0.03 0.03 0.20 0
29、.45 3.50 4.25 1.00 1.40 1.30 2.30 7.75 9.00 4.50 5.50T11333 M33 0.85 0.92 0.15 0.40 0.03 0.03 0.15 0.50 3.50 4.00 1.00 1.35 1.30 2.10 9.00 10.00 7.75 8.75T11334 M34 0.85 0.92 0.15 0.40 0.03 0.03 0.20 0.45 3.50 4.00 1.90 2.30 1.40 2.10 7.75 9.20 7.75 8.75T11336 M36 0.80 0.90 0.15 0.40 0.03 0.03 0.20
30、0.45 3.75 4.50 1.75 2.25 5.50 6.50 4.50 5.50 7.75 8.75T11341 M41 1.05 1.15 0.20 0.60 0.03 0.03 0.15 0.50 3.75 4.50 1.75 2.25 6.25 7.00 3.25 4.25 4.75 5.75T11342 M42 1.05 1.15 0.15 0.40 0.03 0.03 0.15 0.65 3.50 4.25 0.95 1.35 1.15 1.85 9.00 10.00 7.75 8.75T11343 M43 1.15 1.25 0.20 0.40 0.03 0.03 0.15
31、 0.65 3.50 4.25 1.50 1.75 2.25 3.00 7.50 8.50 7.75 8.75T11344 M44 1.10 1.20 0.20 0.40 0.03 0.03 0.30 0.55 4.00 4.75 1.85 2.20 5.00 5.75 6.00 7.00 11.00 12.25T11346 M46 1.22 1.30 0.20 0.40 0.03 0.03 0.40 0.65 3.70 4.20 3.00 3.30 1.90 2.20 8.00 8.50 7.80 8.80T11347 M47 1.05 1.15 0.15 0.40 0.03 0.03 0.
32、20 0.45 3.50 4.00 1.15 1.35 1.30 1.80 9.25 10.00 4.75 5.25. . . M48 1.42 1.52 0.15 0.40 0.03 0.07 0.15 0.40 3.50 4.00 2.75 3.25 9.50 10.50 4.75 5.50 8.00 10.00. . . M62 1.25 1.35 0.15 0.40 0.03 0.07 0.15 0.40 3.50 4.00 1.80 2.10 5.75 6.50 10.00 11.00 . . . . . .Intermediate High Speed SteelsT11350 M
33、50 0.78 0.88 0.15 0.45 0.03 0.03 0.20 0.60 3.75 4.50 0.80 1.25 . . . . . . 3.90 4.75 . . . . . .T11352 M52 0.85 0.95 0.15 0.45 0.03 0.03 0.20 0.60 3.50 4.30 1.65 2.25 0.75 1.50 4.00 4.90 . . . . . .AChemistry limits include product analysis tolerances. Unless otherwise specified, nickel plus copper
34、equals 0.75 % max for all types.BNew designation established in accordance with Practice E527 and SAE J 1086.CWhere specified, sulfur may be 0.06 to 0.15 % to improve machinability.A600 92a (2016)2material form or size does not lend itself to accurate hardnessdetermination on14-in. thick cross-secti
35、onal disks, then longi-tudinal specimens may be used for hardness testing. Examplesare round bars less than12 in. (12.7 mm) in diameter; sheet;and strip. In this case, the specimen shall be a minimum of 3 in.(76.2 mm) in length, and parallel flats shall be ground on theoriginal mill surfaces. The sp
36、ecimens shall be heat treated intwo furnaces, one operating as a preheat furnace and the otheras a high-heat furnace. The furnaces may be either controlledatmosphere or molten-salt bath. The austenitizing temperatureranges stipulated in Table 3 cover both furnace types.7.2.1 After being austenitized
37、 for the proper time, thesamples may be oil quenched or quenched in molten salt plusair cooling. When a salt quench is employed, its temperatureshall be 1050 to 1175F (566 to 635C) except for M3, M4,M41, M42, M43, M46, M47, M48, M62, and T15, when itshall be 1000 to 1075F (538 to 579C). All samples
38、shall bedouble tempered at 1025F (552C) for 2 h each cycle exceptfor M0 and M52 which shall be given two tempering cycles of2 h each at 1000F and M41, M42, M43, M44, M46, M47,M48, M62, and T15, which shall be given three temperingcycles of 2 h each at 1000F.7.2.2 The hardness of the specimen after t
39、he specified heattreatment shall meet the minimum hardness value for theparticular type of steel shown in Table 3. Rockwell C testsshould be used where possible but light-load tests may benecessary on thin specimens. These tests should be specified byagreement between seller and purchaser. The hardn
40、ess valueshall be obtained in accordance with the latest issue of TestMethods and Definitions A370 and shall be the average of atleast five readings taken in an area midway between the centerand surface of the largest dimension of the cross-sectionalspecimen or along the parallel surfaces of the lon
41、gitudinalspecimen. The surface to be tested shall be ground sufficientlyto remove any surface condition, scale, carburization, ordecarburization which might affect readings.8. Macrostructure8.1 The macrostructure of a specimen representing theentire cross-sectional area in the annealed condition and
42、prepared in accordance with the latest issue of Practice A561shall exhibit a structure free of excessive porosity, slag, dirt, orother nonmetallic inclusions, pipes, checks, cracks and otherinjurious defects.8.2 Macroetch severity levels for center porosity and ingotpattern, illustrated photographic
43、ally in Practice A561, shall notexceed the ratings specified in Table 4 for the appropriatematerial size and composition.9. Decarburization9.1 Decarburization shall be determined on a specimenrepresenting a cross section of the material and prepared inaccordance with the latest issue of Guide E3. Wh
44、en examinedat 20 or greater magnification, it shall not exceed the valuesgiven in Tables 5-8 for the appropriate size and shape of thematerial.9.2 Material ordered as drill rod, ground and polished,centerless ground, ground finished, or machine finished flatsand squares shall be free of scale and de
45、carburization.10. Permissible Variations in Dimensions10.1 Permissible variations in dimensions shall not exceedthe applicable limits stated in Tables 8-22, incl. Where out-of-round or square requirements are shown, they shall be deter-mined as follows:10.1.1 Out-of-RoundDifference between high and
46、lowreadings as determined by micrometers or other suitablemeasuring instruments.10.1.2 Out-of-SquareThe amount required to be removedfrom each edge in order to square the edge with the face asdetermined with a square and suitable measuring instruments.11. Workmanship, Finish, and Appearance11.1 High
47、-speed tool steel shall be free of heavy scale, deeppitting, laps, porosity, injurious segregations, excessive non-metallic inclusions, seams, cracks, checks, slivers, scale marks,dents, soft and hard spots, pipes, or any defects that woulddetrimentally affect the suitability of the material, after
48、re-moval of the recommended stock allowance. (See Tables 5-8.)11.2 Visual examination shall be made to ensure compliancewith the requirements for workmanship, finish, dimensions andtolerances, identification marking, and packaging.12. Sampling12.1 Unless otherwise specified, a lot shall consist of a
49、llmaterial submitted for inspection at the same time, of the sameheat, type, finish, and size, and must conform to the provisionsof this specification.TABLE 2 Maximum Brinell Hardness in Annealedor Cold Drawn ConditionTypeAnnealedBHNCold DrawnAnnealed BHNCold DrawnBHNM1 248 255 262M2 (regular C) 248 255 262M2 (high C) 255 262 269M3, Class 1 andClass 2255 262 269M4 255 262 269M6 277 285 293M7 255 262 269M10 (regular C) 248 255 262M10 (high C) 255 262 269M30 269 277 285M33 269 277 285M34 269 277 285M36 269 277 285M41 269 277 285M42 269 277 285M43 269 297 285M44 285 293
