1、Designation:A128/A128M93(Reapproved 2017)Standard Specification forSteel Castings,Austenitic Manganese1This standard is issued under the fixed designation A128/A128M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last re
2、vision.A number in parentheses indicates the year of last reapproval.A superscript 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 Hadfield austeniti
3、c manganesesteel castings and alloy modifications.1.2 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard.Within the text,theSI units are shown in brackets.The values stated in eachsystem are not exact equivalents;therefore,each system mustbe used indepe
4、ndently of the other.Combining values from thetwo systems may result in nonconformance with the specifi-cation.2.Referenced Documents2.1 ASTM Standards:2A781/A781M Specification for Castings,Steel and Alloy,Common Requirements,for General Industrial Use3.General Conditions for Delivery3.1 Material f
5、urnished to this specification shall conform tothe requirements of Specification A781/A781M,including anysupplementary requirements that are indicated in the purchaseorder.Failure to comply with the general requirements ofSpecification A781/A781M constitutes nonconformance withthis specification.In
6、case of conflict between the requirementsof this specification and Specification A781/A781M,thisspecification shall prevail.4.Ordering Information4.1 Orders for material under this specification shouldinclude the following information in proper sequence.4.1.1 Quantity,4.1.2 Specification,grade,4.1.3
7、 Whether any portion of the casting is to be chilled,andwhether this is to be spot or full-face chilling,4.1.4 Special heat-treatment requirements,and4.1.5 Supplementary requirements.5.Heat Treatment5.1 The castings shall be suitably heat treated to achievetoughness and ductility.This heat treatment
8、 shall consist ofuniformly heating the castings to a temperature applicable forgrade of steel produced,at least 1800 F 1000 C,andholding until the temperature is uniform throughout andquenching in an applicable medium,normally water.5.2 Byagreementbetweenthepurchaserandthemanufacturer,castings may b
9、e furnished in a condition otherthan described in 5.1.6.Chemical Composition6.1 The steel shall conform to the requirements as tochemical composition prescribed in Table 1.6.2 Contamination of the drillings by drill chips must beavoided.Flat drills of the best high speed steels,or drills ofsome of t
10、he newer tool materials,will generally be satisfactoryfor drilling manganese steel.Manganese steel may be drilledbest after it has been annealed for several hours at from 900 to1100 F 500 to 600 C.7.Repair by Welding7.1 Defects shall be welded using a procedure and welderscapable of producing sound
11、welds.The weld deposit shall beaustenitic steel in general,but welds on wearing surfaces shallconsist of austenitic manganese steel.7.2 Weld repairs shall be inspected to the same qualitystandards as are used to inspect the castings.8.Keywords8.1 austenitic manganese steel;manganese steel;steelcasti
12、ngs1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloysand is the direct responsibility of SubcommitteeA01.18 on Castings.Current edition approved March 15,2017.Published March 2017.Originallyapproved in 1930.Last previous edition approved i
13、n 2012 as A128/A128M 93(2012).DOI:10.1520/A0128_A0128M-93R17.2For 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.Copyr
14、ight ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International S
15、tandards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 SUPPLEMENTARY REQUIREMENTSAlist of standardized supplementary requirements for use at the option of the purchaser is describedin Specification A781/A781M.Those which are considered
16、suitable for use with this specification arelisted below by title only.Additional supplementary requirements suitable for use with thisspecification at the option of the purchaser are described below.One or more of the supplementaryrequirements indicated below may be included in the purchasers order or contract.When so included,a supplementary the same force as if it were in the body of the specification.Supplementaryrequirements details not fully described shall be agreed upon between the purch
