ASTM_B_947_-_14.pdf

Designation:B94714Standard Practice forHot Rolling Mill Solution Heat Treatment for Aluminum AlloyPlate1This standard is issued under the fixed designation B947;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 parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This practice establishes the controls required for hotrolling mill solution heat treatment of the 6xxx series alumi-num alloy plate in Table 1 when ASTM material specificationsallow use of this process instead of furnace solution heattreatment.For the alloys listed in Table 1,this practice is analternate process to solution heat treatment in a furnace,suchas specified in Practice B918 as the preliminary step for theattainment of T651-type tempers(see ANSI H35.1/H35.1M).1.2 This practice applies only to hot rolling mill solutionheat treatment of plate for the listed aluminum alloys.Precipi-tation hardening(aging),processing,and equipment calibrationfor aging shall meet the practice and requirements of PracticeB918.1.3 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 nonconformancewith the standard.1.4 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 The following documents of the issue in effect on thedate of material purchase form a part of this specification to theextent referenced herein:2.2 ASTM Standards:2B209 Specification for Aluminum and Aluminum-AlloySheet and PlateB209M Specification for Aluminum and Aluminum-AlloySheet and Plate(Metric)B557 Test Methods for Tension Testing Wrought and CastAluminum-and Magnesium-Alloy ProductsB557M Test Methods for Tension Testing Wrought and CastAluminum-and Magnesium-Alloy Products(Metric)B881 Terminology Relating to Aluminum-and Magnesium-Alloy ProductsB918 Practice for Heat Treatment of Wrought AluminumAlloysE2281 Practice for Process and Measurement CapabilityIndicesASTM MNL7 Manual on Presentation of Data and ControlChart Analysis2.3 ANSI Standard:H35.1/H35.1M Alloy and Temper Designation Systems forAluminum32.4 European Standard:EN 485-2 Aluminium and Aluminium AlloysSheet,StripAnd PlatePart 2:Mechanical Properties43.Terminology3.1 DefinitionsFor definitions of terms used in this testmethod,refer to Terminology B881.3.2 Definitions of Terms Specific to This Standard:3.2.1 rolling slab,nsemi-finished or intermediate productproduced by hot rolling which is between ingot and plate form.3.2.2 load sensor or load thermocouple,nsensors that areattached to the production material or a representation ofproduction material,that supply temperature data of the pro-duction material to process or test instrumentation.4.Equipment4.1 Aluminum alloy ingots or rolling slabs are preheatedprior to being hot rolled as prescribed in 6.2.Controls shall be1This practice is under the jurisdiction of ASTM Committee B07 on LightMetals and Alloys and is the direct responsibility of Subcommittee B07.03 onAluminum Alloy Wrought Products.Current edition approved Dec.1,2014.Published December 2014.Originallyapproved in 2006.Last previous edition approved in 2013 as B947 06(2013).DOI:10.1520/B0947-14.2For 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.3Available from the Aluminum Association,Inc.,1525 Wilson Blvd.Suite 600,Arlington,VA 22209,www.aluminum.org.4Available from European Committee for Standardization(CEN),36 rue deStassart,B-1050,Brussels,Belgium.*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 adequate to ensure that the equipment is operated in a mannerwhich precludes overheating of the ingot or rolling slab ordeleterious contamination by the furnace environment.Metaltemperature shall be monitored and controlled to not exceedthe maximum temperature shown in Table 1 prior to hotrolling.NOTE1Some aspects of the metallurgical structure of the alloy aftersolution heat treatment are influenced by the thermal characteristics of theheating equipment used,and the starting microstructure of the ingot.Someheating equipment achieves very rapid temperature rise and may requirethe metal to be soaked for a period to ensure that sufficient applicablealloying ele