ASTM A1008 A1008M-2012 Standard Specification for Steel Sheet Cold-Rolled Carbon Structural High-Strength Low-Alloy High-Strength Low-Alloy with Improved Formability Solution Harde.pdf

1、Designation:A1008/A1008M11 Designation: A1008/A1008M 12Standard Specification forSteel, Sheet, Cold-Rolled, Carbon, Structural, High-StrengthLow-Alloy, High-Strength Low-Alloy with ImprovedFormability, Solution Hardened, and Bake Hardenable1This standard is issued under the fixed designation A1008/A

2、1008M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapp

3、roval.1. Scope*1.1 This specification covers cold-rolled, carbon, structural, high-strength low-alloy, high-strength low-alloy with improvedformability, solution hardened, and bake hardenable steel sheet, in coils and cut lengths.1.2 Cold rolled steel sheet is available in the designations as listed

4、 in 4.1.1.3 This specification does not apply to steel strip as described in Specification A109/A109M.1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be

5、used independently of the other. Combining values from thetwo systems may result in non-conformance with the standard.2. Referenced Documents2.1 ASTM Standards:2A109/A109M Specification for Steel, Strip, Carbon (0.25 Maximum Percent), Cold-Rolled A366/A366MSpecification forCommercial Steel (CS) Shee

6、t,Carbon (0.15 Maximum Per-cent) Cold-RolledA370 Test Methods and Definitions for Mechanical Testing of Steel ProductsA568/A568M Specification for Steel, Sheet, Carbon, Structural, and High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled,General Requirements for A620/A620MSpecification for Drawing S

7、teel (DS), Sheet, Carbon, Cold-Rolled0A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and FerroalloysE18 Test Methods for Rockwell Hardness of Metallic MaterialsE517 Test Method for Plastic Strain Ratio r for Sheet MetalE646 Test Method for Tensile Strain-Hardening Exponents (n

8、-Values) of Metallic Sheet Materials3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 For definitions of other terms used in this specification, refer to Terminology A941.3.1.2 agingloss of ductility with an increase in hardness, yield strength, and tensile strength that occurs

9、when steel that hasbeen slightly cold worked (such as by temper rolling) is stored for some time.3.1.2.1 DiscussionAging increases the tendency of a steel to exhibit stretcher strains and fluting.3.1.3 bake hardenable steelsteel in which significant aging is realized when moderate heat treatment, su

10、ch as that used forpaint baking, follows straining or cold working.3.1.4 inclusion control, nthe process of reducing the volume fraction of inclusions or modifying the shape of inclusions toimprove formability, weldability, and machinability.3.1.4.1 DiscussionInclusions, especially those elongated d

11、uring the rolling process, create the conditions for initiating and/orpropagating cracks when the material is stretched or bent during the manufacture of a part. The adverse effects of inclusions areminimized by reducing the content of inclusions in the steel and/or by altering the shape of inclusio

12、ns through the use of additions1This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.19on Steel Sheet and Strip.Current edition approved AprilMarch 1, 2011.2012. Published April 2011.March

13、 2012. Originally approved in 2000. Last previous edition approved in 20102011 asA1008/A1008M 101. DOI: 10.1520/A1008_A1008M-112.2For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume informat

14、ion, refer to the standards Document Summary page on the ASTM website.1This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depi

15、ct all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standard.Copyright ASTM Internatio

16、nal, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.during the steelmaking process that change the elongated shape of the inclusions to less harmful small, well dispersed globularinclusions.3.1.5 solid-solution hardened steel or solution hardened steelsteel stren

17、gthened through additions of elements, such as Mn,P, or Si, that can be dissolved within the crystalline structure of steels.3.1.5.1 DiscussionAlloying elements that form a solid-solution with iron provide strengthening as a result of local distortionsin atomic arrangements, which arise as a result

18、of the mismatch between the atomic sizes of such elements and that of iron.3.1.6 stabilizationaddition of one or more nitride- or carbide-forming elements, or both, such as titanium and columbium, tocontrol the level of the interstitial elements of carbon and nitrogen in the steel.3.1.6.1 Discussion

19、Stabilizing improves formability and increases resistance to aging.3.1.7 vacuum degassingprocess of refining liquid steel in which the liquid is exposed to a vacuum as part of a specialtechnique for removing impurities or for decarburizing the steel.4. Classification4.1 Cold-rolled steel sheet is av

20、ailable in the following designations:4.1.1 Commercial Steel (CS Types A, B, and C),4.1.2 Drawing Steel (DS Types A and B),NOTE 1CS Type B and DS Type B describe the most common product previously included, respectively, in Specifications A366/A366M andA620/A620M.4.1.3 Deep Drawing Steel (DDS),4.1.4

21、 Extra Deep Drawing Steel (EDDS),4.1.5 Structural Steel (SS grades 25170, 30205, 33230 Types 1 and 2, 40275 Types 1 and 2, 50340, 60410, 70480,and 80550).4.1.6 High-Strength Low-Alloy Steel (HSLAS, in classes 1 and 2, in grades 45310, 50340. 55380, 60410, 65450, and70480 in Classes 1 and 2), and4.1.

22、7 High-Strength Low-Alloy Steel with Improved Formability (HSLAS-F grades 50340, 60410, 70480, and 80550).4.1.7.1 HSLAS-F steel has improved formability when compared to HSLAS. The steel is fully deoxidized, made to fine grainpractice and includes microalloying elements such as columbium, vanadium,

23、zirconium, etc. The steel shall be treated to achieveinclusion control.4.1.8 Solution hardened steel (SHS), and4.1.9 Bake hardenable steel (BHS).4.2 When required for HSLAS and HSLAS-F steels, limitations on the use of one or more of the microalloy elements shall bespecified on the order.4.3 Cold-ro

24、lled steel sheet is supplied for either exposed or unexposed applications. Within the latter category, cold-rolled sheetis specified either “temper rolled” or “annealed last.” For details on processing, attributes and limitations, and inspection standards,refer to Specification A568/A568M.5. Orderin

25、g Information5.1 It is the purchasers responsibility to specify in the purchase order all ordering information necessary to describe the requiredmaterial. Examples of such information include, but are not limited to, the following:5.1.1 ASTM specification number and year of issue;5.1.2 Name of mater

26、ial and designation (cold-rolled steel sheet) (include grade, type, and class, as appropriate, for CS, DS,DDS, EDDS, SS, HSLAS, HSLAS-F, SHS, or BHS) (see 4.1);5.1.2.1 When a type is not specified for CS or DS, Type B will be furnished (see 4.1);5.1.2.2 When a class is not specified for HSLAS, Class

27、 1 will be furnished (see 4.1);5.1.2.3 When a type is not specified for SS 33 230 and SS 40 275, Type 1 will be furnished (see 4.1);5.1.3 Classification (either exposed, unexposed, temper rolled, or annealed last) (see 4.3);5.1.4 Finish (see 9.1);5.1.5 Oiled or not oiled, as required (see 9.2);5.1.6

28、 Dimensions (thickness, width, and whether cut lengths or coils);NOTE 2Not all producers are capable of meeting all the limitations of the thickness tolerance tables in Specification A568/A568M. The purchasershould contact the producer regarding possible limitations prior to placing an order.5.1.7 C

29、oil size (must include inside diameter, outside diameter, and maximum weight);5.1.8 Copper bearing steel (if required);5.1.9 Quantity;5.1.10 Application (part identification and description);5.1.11 A report of heat analysis will be supplied, if requested, for CS, DS, DDS, and EDDS. For materials wit

30、h requiredmechanical properties, SS, HSLAS, HSLAS-F, SHS, and BHS, a report is required of heat analysis and mechanical properties asdetermined by the tension test, andA1008/A1008M 1225.1.12 Special requirements (if any).5.1.12.1 When the purchaser requires thickness tolerances for38 in. 10 mm minim

31、um edge distance (see SupplementaryRequirement in Specification A568/A568M), this requirement shall be specified in the purchase order or contract.NOTE 3A typical ordering description is as follows: ASTM A 1008-XX, cold rolled steel sheet, CS Type A, exposed, matte finish, oiled, 0.035 by30 in. by c

32、oil, ID 24 in., OD 48 in., max weight 15 000 lbs, 100 000 lb, for part No. 4560, Door Panel.or:ASTMA1008M-XX, cold-rolled steel sheet, SS grade 275, unexposed, matte finish, oiled, 0.88 mm by 760 mm by 2440 mm, 10 000 kg, for shelf bracket.6. General Requirements for Delivery6.1 Material furnished u

33、nder this specification shall conform to the applicable requirements of the current edition ofSpecification A568/A568M unless otherwise provided herein.7. Chemical Composition7.1 The heat analysis of the steel shall conform to the chemical composition requirements of the appropriate designation show

34、nin Table 1 for CS, DS, DDS, and EDDS and in Table 2 for SS, HSLAS, HSLAS-F, SHS, and BHS.7.2 Each of the elements listed in Table 1 and Table 2 shall be included in the report of the heat analysis. When the amount ofcopper, nickel, chromium, or molybdenum is less than 0.02 %, report the analysis as

35、 0.02 % or the actual determined value. Whenthe amount of vanadium, columbium, or titanium is less than 0.008 %, report the analysis as 0.008 % or the actual determinedvalue. When the amount of boron is less than 0.0005 %, report the analysis as 0.0005 % or the actual determined value.7.3 Sheet stee

36、l grades defined by this specification are suitable for welding if appropriate welding conditions are selected. Forcertain welding processes, if more restrictive composition limits are desirable, they shall be specified at the time of inquiry andconfirmed at the time of ordering.8. Mechanical Proper

37、ties8.1 CS, DS, DDS, and EDDS:8.1.1 Typical nonmandatory mechanical properties for CS, DS, DDS and EDDS are shown in Table 3.8.1.2 The material shall be capable of being bent, at room temperature, in any direction through 180 flat on itself withoutcracking on the outside of the bent portion (see Sec

38、tion 14 of Test Methods and Definitions A370). The bend test is not arequirement of delivery. However, if testing is performed by the purchaser, material not conforming to the requirement shall besubject to rejection.8.1.3 Sheet of these designations except for EDDS are subject to aging dependent up

39、on processing factors such as the methodof annealing (continuous annealing or box annealing), and chemical composition. For additional information on aging, seeAppendix X1 of Specification A568/A568M.8.1.4 EDDS steel is stabilized to be nonaging and so is not subject to stretcher strains and fluting

40、. Other steels are processedto be nonaging; please consult your supplier.8.2 SS, HSLAS, HSLAS-F, SHS, and BHS:8.2.1 The available strength grades for SS, HSLAS and HSLAS-F are shown in Table 4.8.2.2 The available strength grades for SHS and BHS are shown in Table 5.TABLE 1 Chemical CompositionAFor C

41、old Rolled Steel Sheet Designations CS, DS, DDS, and EDDS% Heat Analysis, Element Maximum Unless Otherwise ShownDesignation C Mn P S Al Si Cu Ni CrBMo V Cb TiCNBCS Type AD,E,F,G0.10 0.60 0.030 0.035 . . . . . . 0.20H0.20 0.15 0.06 0.008 0.008 0.025 . . . . . .CS Type BD0.02 to0.150.60 0.030 0.035 .

42、. . . . . 0.20H0.20 0.15 0.06 0.008 0.008 0.025 . . . . . .CS Type CD,E,F,G0.08 0.60 0.10 0.035 . . . . . . 0.20H0.20 0.15 0.06 0.008 0.008 0.025 . . . . . .DS Type AE,I0.08 0.50 0.020 0.030 0.01 min . . . 0.20 0.20 0.15 0.06 0.008 0.008 0.025 . . . . . .DS Type B 0.02 to0.080.50 0.020 0.030 0.02 mi

43、n . . . 0.20 0.20 0.15 0.06 0.008 0.008 0.025 . . . . . .DDSF,G0.06 0.50 0.020 0.025 0.01 min . . . 0.20 0.20 0.15 0.06 0.008 0.008 0.025 . . . . . .EDDSJ0.02 0.40 0.020 0.020 0.01 min . . . 0.10 0.10 0.15 0.03 0.10 0.10 0.15 . . . . . .AWhere an ellipsis (. . .) appears in the table, there is no re

44、quirement, but the analysis result shall be reported.BChromium is permitted, at the producers option, to 0.25 % maximum when the carbon content is less than or equal to 0.05 %.CFor steels containing 0.02 % or more carbon, titanium is permitted at the producers option, to the lesser of 3.4N + 1.5S or

45、 0.025 %.DWhen an aluminum deoxidized steel is required for the application, it is permissible to order Commercial Steel (CS) to a minimum of 0.01 % total aluminum.ESpecify Type B to avoid carbon levels below 0.02 %.FIt is permissible to furnish as a vacuum degassed or chemically stabilized steel, o

46、r both, at the producers option.GFor carbon levels less than or equal to 0.02 %, it is permissible to use vanadium, columbium or titanium, or a combination thereof, as stabilizing elementsattheproducers option. In such cases, the applicable limit for vanadium or columbium shall be 0.10 % max. and th

47、e limit on titanium shall be 0.15 % max.HWhen copper steel is specified, the copper limit is a minimum requirement. When copper steel is not specified, the copper limit is a maximum requirement.IIf produced utilizing a continuous anneal process, stabilized steel is permissible at the producers optio

48、n, and Footnotes F and G apply.JShall be furnished as a vacuum degassed and stabilized steel.A1008/A1008M 1238.2.3 Tension Tests:8.2.3.1 RequirementsMaterial as represented by the test specimen shall conform to the mechanical property requirementsspecified in Table 4. These requirements do not apply

49、 to the uncropped ends of unprocessed coils.8.2.3.2 Number of TestsTwo tension tests shall be made from each heat or from each 50 tons 45 000 kg. When the amountof finished material from a heat is less than 50 tons 45 000 kg, one test shall be made. When material rolled from heat differsTABLE 2 Chemical CompositionAFor Cold Rolled Steel Sheet Designations SS, HSLAS, HSLAS-F, SHS, and BHS% Heat Analysis, Element Maximum Unless Otherwise ShownDesignation C Mn P S Al Si CuBNi Cr Mo V Cb Ti NSS:CGrade 25 170 0.20