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
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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
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