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Designation: A128/A128M − 93 (Reapproved 2017)Standard Specif i cation forSteel Castings, Austenitic Manganese 1This standard is issued under the f i xed designation A128/A128M; 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 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 specif i cation covers Hadf i eld austenitic manganesesteel castings and alloy modif i cations.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 independently of the other. Combining values from thetwo systems may result in nonconformance with the specif i -cation.2. Referenced Documents2.1 ASTM Standards: 2A781/A781M Specif i cation for Castings, Steel and Alloy,Common Requirements, for General Industrial Use3. General Conditions for Delivery3.1 Material furnished to this specif i cation shall conform tothe requirements of Specif i cation A781/A781M, including anysupplementary requirements that are indicated in the purchaseorder. Failure to comply with the general requirements ofSpecif i cation A781/A781M constitutes nonconformance withthis specif i cation. In case of conf l ict between the requirementsof this specif i cation and Specif i cation A781/A781M, thisspecif i cation shall prevail.4. Ordering Information4.1 Orders for material under this specif i cation shouldinclude the following information in proper sequence.4.1.1 Quantity,4.1.2 Specif i cation, grade,4.1.3 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 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 By agreement between the purchaser and themanufacturer, castings may be 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 the 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 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; steelcastings1 This specif i cation 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 in 2012 as A128/A128M – 93(2012). DOI: 10.1520/A0128_A0128M-93R17.2 For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at service@astm.org. For Annual Book of ASTMStandards volume information, refer to the standard’s Document Summary page onthe ASTM website.Copyright © 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 Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1 Copyright by ASTM Int'l (all rights reserved); Fri Oct 6 22:58:02 EDT 2017Downloaded/printed byUniversity of Edinburgh (University of Edinburgh) pursuant to License Agreement. No further reproductions authorized.