ASTM_A_427_-_A_427M_-_10_2015.pdf

Designation:A427/A427M10(Reapproved 2015)Standard Specification forWrought Alloy Steel Rolls for Cold and Hot Reduction1This standard is issued under the fixed designation A427/A427M;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.1.Scope1.1 This specification covers homogeneous wrought hard-ened alloy steel rolls for use in cold or hot reduction of flatrolled ferrous and nonferrous products.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A788/A788M Specification for Steel Forgings,General Re-quirementsA956 Test Method for Leeb Hardness Testing of SteelProductsE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE92 Test Method for Vickers Hardness of Metallic Materials(Withdrawn 2010)3E140 Hardness Conversion Tables for Metals RelationshipAmong Brinell Hardness,Vickers Hardness,RockwellHardness,Superficial Hardness,Knoop Hardness,Sclero-scope Hardness,and Leeb HardnessE448 Practice for Scleroscope Hardness Testing of MetallicMaterials3.Ordering Information3.1 The purchaser shall specify in the inquiry,contract,ororder the complete dimensions,hardness range,surface finish,and use.Any other requirements shall also be specified.3.2 Material supplied to this specification shall conform tothe requirements of Specification A788/A788M,which out-linesadditionalorderinginformation,manufacturingrequirements,testing and retesting methods and procedures,marking,certification,product analysis variations,and addi-tional supplementary requirements.4.Process4.1 The steel shall be made by the electric-furnace process.Additional refining by vacuum arc remelt or electroslag ispermitted.5.Manufacture5.1 The forged rolls shall receive their hot mechanical workunder a press or hammer of ample capacity to work the metalthroughout its section.However,6-in.150-mm diameter orless rolls may be produced from rolled bars.6.Discard6.1 Sufficient discard shall be made from each ingot tosecure freedom from piping and undue segregation.7.Chemical Requirements7.1 Unless specified by the purchaser,the chemical require-ments shall be at the discretion of the manufacturer.8.Heat Treatment8.1 The method of heat treatment and hardening shall be atthe option of the manufacturer.9.Hardness Requirements9.1 The manufacturer shall supply rolls to the hardnessranges agreed upon by the purchaser and the manufacturer.9.2 Ahardness range of either 5 points Shore scleroscope or100 numbers Vickers hardness is permissible.10.Hardness Testing10.1 Each roll shall be tested for hardness and shall bewithin limits specified on the order.The Shore forged roll1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.06 on Steel Forgings and Billets.Current edition approved March 1,2015.Published March 2015.Originallyapproved in 1958.Last previous edition approved in 2010 as A427/A427M 10.DOI:10.1520/A0427_A0427M-10R15.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 scleroscope(HFRSCor HFRSD),Rockwell hardness tester,Vickers hardness penetrator,or Leeb hardness tester(in accor-dance with Test Method A956)may be used to determinecompliance with the hardness range specified.The approxi-mate relationship between Shore HFRSCscleroscope anddiamond pyramid hardness is shown in Table 1.10.2 The stage of processing at which hardness testing isconducted and the number and location of tests may be agreedupon by the purchaser and the manufacturer.10.3 A sufficient number of hardness tests shall be made toensure the required uniformity,both longitudinally and circum-ferentially.11.Soundness11.1 The material shall be free of injurious imperfections.12.Workmanship12.1 The roll shall conform to the dimensions and su