1、Designation:A 715 98Standard Specification forSteel Sheet and Strip,High-Strength,Low-Alloy,Hot-Rolled,and Steel Sheet,Cold-Rolled,High-Strength,Low-Alloy,withImproved Formability1This standard is issued under the fixed designation A 715;the number immediately following the designation indicates the
2、 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(e)indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Departmen
3、t of Defense.1.Scope1.1 This specification covers high-strength,low-alloy,hot-rolled steel sheet and strip and cold-rolled sheet havingimproved formability when compared with steels covered bySpecifications A 606 and A 607.The product is furnished aseither cut lengths or coils and is available in fo
4、ur-strengthlevels,Grades 50,60,70,and 80(corresponding to minimumyield strength(see Table 1).The steel is killed,made to a finegrain practice,and includes microalloying elements such ascolumbium,titanium,vanadium,zirconium,etc.The steel maybe treated to achieve inclusion control.The product is inten
5、dedfor structural and miscellaneous applications where higherstrength,savings in weight,improved formability,and weld-ability are important.1.2 The values stated in inch-pound units are to be regardedas the standard.2.Referenced Documents2.1 ASTM Standards:A 568/A568M Specification for Steel,Sheet,C
6、arbon,andHigh-Strength,Low-Alloy,Hot-Rolled and Cold-Rolled,General Requirements for2A 606 Specification for Steel,Sheet and Strip,High-Strength,Low-Alloy,Hot-Rolled and Cold-Rolled,withImproved Atmospheric Corrosion Resistance2A 607 Specification for Steel,Sheet and Strip,High-Strength,Low-Alloy,Co
7、lumbium or Vanadium,or Both,Hot-Rolled and Cold-Rolled2A 749/A749M Specification for Steel,Strip,Carbon andHigh-Strength,Low-Alloy,Hot-Rolled,General Require-ments for23.Ordering Information3.1 Orders for material under this specification shall includethe following information,as required,to describ
8、e adequatelythe desired material:3.1.1 ASTM designation number and year of issue,3.1.2 Grade(see Table 2),3.1.3 Name of material(hot-rolled high-strength low-alloysteel sheet or strip,or cold-rolled sheet),3.1.4 Condition(material to this specification is furnished inthe hot-rolled condition.Pickled
9、,or blast cleaned,must bespecified if required.Material so ordered will be oiled unlessordered“not oiled”(see 8.1 and 8.2).For cold-rolled,indicateexposed(E)or unexposed(U).Matte dull finish will besupplied unless otherwise specified,3.1.5 Edges(see 8.3),and3.1.6 Dimensions(thickness,width,and lengt
10、h for cutlengths,or thickness and width for coils).3.1.6.1 As agreed upon between the purchaser and theproducer,material ordered to this specification will be suppliedto meet the appropriate standard or restricted thickness toler-ance table shown in Specification A 568/A 568M.NOTE1Not all producers
11、are capable of meeting all of the limitationsof the thickness tolerance tables in Specification A 568/A 568M.Thepurchaser should contact the producer regarding possible limitations priorto placing an order.3.1.7 Coil size and weight requirements(must includeinside diameter,outside diameter,and maxim
12、um weight),3.1.8 Application(part identification and description),and3.1.9 Special requirements(if required).1This specification is under the jurisdiction of ASTM Committee A-1 on Steel,Stainless Steel and Related Alloys,and is the direct responsibility of SubcommitteeA01.19 on Steel Sheet and Strip
13、.Current edition approved May 10,1998.Published September 1998.Originallypublished as A 715 75.Last previous edition A 715 96.2Annual Book of ASTM Standards,Vol 01.03.TABLE 1Tensile RequirementsAGrade 50Grade 60Grade 70Grade 80Yield strength,min,ksi(MPa)50(345)60(415)70(485)80(550)Tensile strength,m
14、in,ksi(MPa)60(415)70(485)80(550)90(620)Elongation in 2 in.or 50 mm,min,%for thickness:Hot RolledOver 0.097 in.(2.46 mm)24.022.020.018.0Up to 0.097 in.(2.46 mm),incl22.020.018.016.0Cold Rolled22.018.016.014.0AFor coil products,testing by the producer is limited to the end of the coil.Results of such
15、tests must comply with the specified values.Tensile propertiesthroughout the balance of the coil must not be less than 90%of the minimumvalues specified.1AMERICAN SOCIETY FOR TESTING AND MATERIALS100 Barr Harbor Dr.,West Conshohocken,PA 19428Reprinted from the Annual Book of ASTM Standards.Copyright
16、 ASTMNOTE2A typical ordering description is as follows:ASTMA 715 XX,Grade 80,hot-rolled high-strength low-alloy steel sheet,pickled and oiled,cut edge 0.100 by 48 by 96 in.for Part 83479,bumperreinforcement bracket.4.Materials and Manufacture4.1 Sheet or strip to this specification is produced fromkilled steel,made to a fine grain practice.The steel may betreated to achieve inclusion control.5.Chemical Composition5.1 The cast or heat analysis of the steel shall conform to thechemical requirement