1、Designation: A600 92a (Reapproved 2010)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 Department of Defense.1. Scope1.1 This specification covers tungsten-type andmolybdenum-type high
3、-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 steel
4、s 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 values st
5、ated 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 Testingof
6、Steel ProductsA388/A388M Practice for Ultrasonic Examination of SteelForgingsA561 Practice for Macroetch Testing of Tool Steel BarsA700 Practices for Packaging, Marking, and Loading Meth-ods for Steel Products for ShipmentE3 Guide for Preparation of Metallographic SpecimensE30 Test Methods for Chemi
7、cal Analysis of Steel, CastIron, Open-Hearth Iron, and Wrought IronE45 Test Methods for Determining the Inclusion Content ofSteelE59 Practice for Sampling Steel and Iron for Determinationof Chemical Composition2.2 Military Standard:MIL-STD-163 Steel Mill Products, Preparation for Ship-ment and Stora
8、ge32.3 Federal Standards:Fed. Std. No. 123 Marking for Shipment (Civil Agencies)3Fed. Std. No. 183 Continuous Identification Marking ofIron and Steel Products33. Classification3.1 Material in accordance with this specification is classi-fied by chemical composition. Types correspond to respectiveAIS
9、I 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 characterized by a controlled high molybdenu
10、m 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 lower total alloy content than the
11、standard 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:4.1.1 Name of material (high-speed to
12、ol steel),4.1.2 Type,4.1.3 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 diameterrange, the maximum outside diameter, and maximum or1Thi
13、s 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 Oct. 1, 2010. Published December 2010. Originallyapproved in 1969. Last previous edition approv
14、ed in 2004 as A600 92a (2004).DOI: 10.1520/A0600-92AR10.2For 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.3Avai
15、lable from Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.minimum coil weight if required. (Minimum coil weights ares
16、ubject to negotiation.),4.1.5 Finish (hot rolled, forged, blasted or pickled, colddrawn, rough machined, ground, precision ground and pol-ished),4.1.6 Condition (annealed),4.1.7 ASTM designation and date of issue, and4.1.8 Special or supplementary requirements.5. Materials and Manufacture5.1 Unless
17、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 themanufacturer to determine the percentage of the elementsspecified and these values shall conform to the requirement
18、s 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 purchaser from finishedbars and forgings by machining off the entire cross section anddrilling parallel to the a
19、xis of the bar or forging at any pointmidway between the center and surface in accordance with thelatest issue of Method E59. The chemical analysis of thedrilling chips shall be made in accordance with the latest issueof Methods E30. The chemical composition thus determinedshall not vary from the li
20、mits 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 Brinell hardness values (or equivalentRockwell hardness values) specified in Table 2.7.2 Specimens for determinatio
21、n 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 the material. If thematerial form or size does not lend itself to accurate hardnessdetermination on14-in. thick cross
22、-sectional 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 3in. (76.2 mm) in length, and parallel flats shall be ground on theTABLE 1 Chemical Require
23、ments, %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 0.20 0.40 3.75 4.50 0.90 1.30 17.25 18.75
24、 . . . . . . . . . . . .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 0.03 0.03 0.20 0.40 3.75 5.00 1.80 2.40 1
25、7.50 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 0.15 0.40 0.03 0.03 0.15 0.40 3.75 5.00 4.50
26、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 6.75 4.50 5.50 . . . . . .high C 0.95 1.05 0
27、.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 3.25 5.00 6.75 4.75 6.50 . . . . . .T1130
28、4 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 1.75 2.25 1.40 2.10 8.20 9.20 . . . . . .T1
29、1310 M10 regular 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 0.45 3.50 4.25 1.00 1.40 1.30 2.30 7.75 9.
30、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 0.45 3.75 4.50 1.75 2.25 5.50 6.50 4.50 5
31、.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 0.65 3.50 4.25 1.50 1.75 2.25 3.00 7.50
32、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 0.20 0.45 3.50 4.00 1.15 1.35 1.30 1.80 9.2
33、5 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 M50 0.78 0.88 0.15 0.45 0.03 0.03 0.20 0.6
34、0 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 equals 0.75 % max for all types.BNew desi
35、gnation 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 (2010)2original mill surfaces. The specimens shall be heat treated intwo furnaces, one operating as a preheat furnace and the otheras a high-heat furna
36、ce. 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 for the proper time, thesamples may be oil quenched or quenched in molten salt plusair cooling. When a salt quenc
37、h 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 shall bedouble tempered at 1025F (552C) for 2 h each cycle exceptfor M0 and M52 which shall be given two temperi
38、ng 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 the specified heattreatment shall meet the minimum hardness value for theparticular type of steel shown in Table
39、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 hardness valueshall be obtained in accordance with the latest issue of TestMethods and Definitions A370 and shall be
40、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 longitudinalspecimen. The surface to be tested shall be ground sufficientlyto remove any surface condition, scale,
41、carburization, ordecarburization which might affect readings.8. Macrostructure8.1 The macrostructure of a specimen representing theentire cross-sectional area in the annealed condition andprepared in accordance with the latest issue of Practice A561shall exhibit a structure free of excessive porosit
42、y, slag, dirt, orother nonmetallic inclusions, pipes, checks, cracks and otherinjurious defects.8.2 Macroetch severity levels for center porosity and ingotpattern, illustrated photographically in Practice A561, shall notexceed the ratings specified in Table 4 for the appropriatematerial size and com
43、position.9. Decarburization9.1 Decarburization shall be determined on a specimenrepresenting a cross section of the material and prepared inaccordance with the latest issue of Methods E3. When exam-ined at 203 or greater magnification, it shall not exceed thevalues given in Tables 5-8 for the approp
44、riate size and shape ofthe material.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 decarburization.10. Permissible Variations in Dimensions10.1 Permissible variations in dimensions shall not e
45、xceedthe 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 lowreadings as determined by micrometers or other suitablemeasuring instruments.10.1.2 Out-of-SquareThe amo
46、unt 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-speed tool steel shall be free of heavy scale, deeppitting, laps, porosity, injurious segregations, excess
47、ive 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 re-moval of the recommended stock allowance. (See Tables 5-8)11.2 Visual examination shall be made to ensur
48、e compliancewith the requirements for workmanship, finish, dimensions andtolerances, identification marking, and packaging.12. Sampling12.1 Unless otherwise specified, a lot shall consist of allmaterial submitted for inspection at the same time, of the sameheat, type, finish, and size, and must conf
49、orm to the provisionsof this specification.13. Inspection13.1 Unless otherwise specified in the contract or purchaseorder, the supplier is responsible for the performance of allinspection requirements as specified herein. The supplier mayutilize his own facilities or any other acceptable to thepurchaser.TABLE 2 Maximum Brinell Hardness in Annealed or Cold DrawnConditionType AnnealedBHNCold 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
