1、Designation: A1008/A1008M 12 A1008/A1008M 12a Standard Specication for Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability, Solution Hardened, and Bake Hardenable 1 This standard is issued under the xed designation A1008/A1008M; t
2、he number immediately following the designation indicates the year of 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.
3、 1. Scope* 1.1 This specication covers cold-rolled, carbon, structural, high-strength low-alloy, high-strength low-alloy with improved formability, 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 in
4、4.1. 1.3 This specication does not apply to steel strip as described in Specication 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 each system may not be exact equivalents; therefore, each system shall be used
5、independently of the other. Combining values from the two systems may result in non-conformance with the standard. 2. Referenced Documents 2.1 ASTM Standards: 2 A109/A109M Specication for Steel, Strip, Carbon (0.25 Maximum Percent), Cold-Rolled A370 Test Methods and Denitions for Mechanical Testing
6、of Steel Products A568/A568M Specication for Steel, Sheet, Carbon, Structural, and High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled, General Requirements for A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys E18 Test Methods for Rockwell Hardness of Metallic Ma
7、terials E517 Test Method for Plastic Strain Ratio r for Sheet Metal E646 Test Method for Tensile Strain-Hardening Exponents (n -Values) of Metallic Sheet Materials 3. Terminology 3.1 Denitions of Terms Specic to This Standard: 3.1.1 For denitions of other terms used in this specication, refer to Ter
8、minology A941. 3.1.2 agingloss of ductility with an increase in hardness, yield strength, and tensile strength that occurs when steel that has been slightly cold worked (such as by temper rolling) is stored for some time. 3.1.2.1 Discussion Aging increases the tendency of a steel to exhibit stretche
9、r strains and uting. 3.1.3 bake hardenable steelsteel in which signicant aging is realized when moderate heat treatment, such as that used for paint baking, follows straining or cold working. 3.1.4 inclusion control, nthe process of reducing the volume fraction of inclusions or modifying the shape o
10、f inclusions to improve formability, weldability, and machinability. 1 This specication is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.19 on Steel Sheet and Strip. Current edition approved March 1, 201
11、2Nov. 1, 2012. Published March 2012November 2012. Originally approved in 2000. Last previous edition approved in 20112012 as A1008/A1008M 11.A1008/A1008M 12. DOI: 10.1520/A1008_A1008M-12.10.1520/A1008_A1008M-12a. 2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM
12、Customer Service at serviceastm.org. For Annual Book of ASTM Standards volume information, refer to the standards Document Summary page on the ASTM website. This 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
13、 to the previous version. Because it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version of the standard as published by ASTM is to be considered the official document. *A
14、 Summary of Changes section appears at the end of this standard Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States 13.1.4.1 Discussion Inclusions, especially those elongated during the rolling process, create the conditions for initiatin
15、g and/or propagating cracks when the material is stretched or bent during the manufacture of a part. The adverse effects of inclusions are minimized by reducing the content of inclusions in the steel and/or by altering the shape of inclusions through the use of additions during the steelmaking proce
16、ss that change the elongated shape of the inclusions to less harmful small, well dispersed globular inclusions. 3.1.5 solid-solution hardened steel or solution hardened steelsteel strengthened through additions of elements, such as Mn, P, or Si, that can be dissolved within the crystalline structure
17、 of steels. 3.1.5.1 Discussion Alloying elements that form a solid-solution with iron provide strengthening as a result of local distortions in atomic arrangements, which arise as a result of the mismatch between the atomic sizes of such elements and that of iron. 3.1.6 stabilizationaddition of one
18、or more nitride- or carbide-forming elements, or both, such as titanium and columbium, to control the level of the interstitial elements of carbon and nitrogen in the steel. 3.1.6.1 Discussion Stabilizing improves formability and increases resistance to aging. 3.1.7 vacuum degassingprocess of rening
19、 liquid steel in which the liquid is exposed to a vacuum as part of a special technique for removing impurities or for decarburizing the steel. 4. Classication 4.1 Cold-rolled steel sheet is available in the following designations: 4.1.1 Commercial Steel (CS Types A, B, and C), 4.1.2 Drawing Steel (
20、DS Types A and B), NOTE 1CS Type B and DS Type B describe the most common product previously included, respectively, in Specications A366/A366M and A620/A620M. 4.1.3 Deep Drawing Steel (DDS), 4.1.4 Extra Deep Drawing Steel (EDDS), 4.1.5 Structural Steel (SS grades 25170, 30205, 33230 Types 1 and 2,
21、40275 Types 1 and 2, 45310, 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, and 70480 in Classes 1 and 2), and 4.1.7 High-Strength Low-Alloy Steel with Improved Formability (HSLAS-F grades 50340, 60410, 704
22、80, and 80550). 4.1.7.1 HSLAS-F steel has improved formability when compared to HSLAS. The steel is fully deoxidized, made to ne grain practice and includes microalloying elements such as columbium, vanadium, zirconium, etc. The steel shall be treated to achieve inclusion control. 4.1.8 Solution har
23、dened steel (SHS), and 4.1.9 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 be specied on the order. 4.3 Cold-rolled steel sheet is supplied for either exposed or unexposed applications. Within the l
24、atter category, cold-rolled sheet is specied either “temper rolled” or “annealed last.” For details on processing, attributes and limitations, and inspection standards, refer to Specication A568/A568M. 5. Ordering Information 5.1 It is the purchasers responsibility to specify in the purchase order a
25、ll ordering information necessary to describe the required material. Examples of such information include, but are not limited to, the following: 5.1.1 ASTM specication number and year of issue; 5.1.2 Name of material and designation (cold-rolled steel sheet) (include grade, type, and class, as appr
26、opriate, for CS, DS, DDS, EDDS, SS, HSLAS, HSLAS-F, SHS, or BHS) (see 4.1); 5.1.2.1 When a type is not specied for CS or DS, Type B will be furnished (see 4.1); 5.1.2.2 When a class is not specied for HSLAS, Class 1 will be furnished (see 4.1); 5.1.2.3 When a type is not specied for SS 33 230 and SS
27、 40 275, Type 1 will be furnished (see 4.1); 5.1.3 Classication (either exposed, unexposed, temper rolled, or annealed last) (see 4.3); A1008/A1008M 12a 25.1.4 Finish (see 9.1); 5.1.5 Oiled or not oiled, as required (see 9.2); 5.1.6 Dimensions (thickness, width, and whether cut lengths or coils); NO
28、TE 2Not all producers are capable of meeting all the limitations of the thickness tolerance tables in Specication A568/A568M. The purchaser should contact the producer regarding possible limitations prior to placing an order. 5.1.7 Coil size (must include inside diameter, outside diameter, and maxim
29、um weight); 5.1.8 Copper bearing steel (if required); 5.1.9 Quantity; 5.1.10 Application (part identication and description); 5.1.11 A report of heat analysis will be supplied, if requested, for CS, DS, DDS, and EDDS. For materials with required mechanical properties, SS, HSLAS, HSLAS-F, SHS, and BH
30、S, a report is required of heat analysis and mechanical properties as determined by the tension test, and 5.1.12 Special requirements (if any). 5.1.12.1 When the purchaser requires thickness tolerances for 3 8 in. 10 mm minimum edge distance (see Supplementary Requirement in Specication A568/A568M),
31、 this requirement shall be specied 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 nish, oiled, 0.035 by 30 in. by coil, ID 24 in., OD 48 in., max weight 15 000 lbs, 100 000 lb, for part No. 456
32、0, Door Panel. or: ASTM A 1008M-XX, cold-rolled steel sheet, SS grade 275, unexposed, matte nish, oiled, 0.88 mm by 760 mm by 2440 mm, 10 000 kg, for shelf bracket. 6. General Requirements for Delivery 6.1 Material furnished under this specication shall conform to the applicable requirements of the
33、current edition of Specication A568/A568M unless otherwise provided herein. 7. Chemical Composition 7.1 The heat analysis of the steel shall conform to the chemical composition requirements of the appropriate designation shown in Table 1 for CS, DS, DDS, and EDDS and in Table 2 for SS, HSLAS, HSLAS-
34、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 of copper, nickel, chromium, or molybdenum is less than 0.02 %, report the analysis as 0.02 % or the actual determined value. When the amount of vanadium, col
35、umbium, or titanium is less than 0.008 %, report the analysis as 0.008 % or the actual determined value. When the amount of boron is less than 0.0005 %, report the analysis as 0.0005 % or the actual determined value. 7.3 Sheet steel grades dened by this specication are suitable for welding if approp
36、riate welding conditions are selected. For certain welding processes, if more restrictive composition limits are desirable, they shall be specied at the time of inquiry and conrmed at the time of ordering. TABLE 1 Chemical Composition A For Cold Rolled Steel Sheet Designations CS, DS, DDS, and EDDS
37、% Heat Analysis, Element Maximum Unless Otherwise Shown Designation C Mn P S Al Si Cu Ni Cr B Mo V Cb Ti C N B CS Type A D,E,F,G 0.10 0.60 0.030 0.035 . . . . . . 0.20 H 0.20 0.15 0.06 0.008 0.008 0.025 . . . . . . CS Type B D 0.02 to 0.15 0.60 0.030 0.035 . . . . . . 0.20 H 0.20 0.15 0.06 0.008 0.0
38、08 0.025 . . . . . . CS Type C D,E,F,G 0.08 0.60 0.10 0.035 . . . . . . 0.20 H 0.20 0.15 0.06 0.008 0.008 0.025 . . . . . . DS Type A E,I 0.08 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 to 0.08 0.50 0.020 0.030 0.02 min . . . 0.20 0.20 0.15 0.06
39、0.008 0.008 0.025 . . . . . . DDS F,G 0.06 0.50 0.020 0.025 0.01 min . . . 0.20 0.20 0.15 0.06 0.008 0.008 0.025 . . . . . . EDDS J 0.02 0.40 0.020 0.020 0.01 min . . . 0.10 0.10 0.15 0.03 0.10 0.10 0.15 . . . . . . A Where an ellipsis (. . .) appears in the table, there is no requirement, but the a
40、nalysis result shall be reported. B Chromium is permitted, at the producers option, to 0.25 % maximum when the carbon content is less than or equal to 0.05 %. C For steels containing 0.02 % or more carbon, titanium is permitted at the producers option, to the lesser of 3.4N + 1.5S or 0.025 %. D When
41、 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. E Specify Type B to avoid carbon levels below 0.02 %. F It is permissible to furnish as a vacuum degassed or chemically stabilized steel, or both, at
42、 the producers option. G For carbon levels less than or equal to 0.02 %, it is permissible to use vanadium, columbium or titanium, or a combination thereof, as stabilizing elements at the producers option. In such cases, the applicable limit for vanadium or columbium shall be 0.10 % max. and the lim
43、it on titanium shall be 0.15 % max. H When copper steel is specied, the copper limit is a minimum requirement. When copper steel is not specied, the copper limit is a maximum requirement. I If produced utilizing a continuous anneal process, stabilized steel is permissible at the producers option, an
44、d Footnotes F and G apply. J Shall be furnished as a vacuum degassed and stabilized steel. A1008/A1008M 12a 38. Mechanical Properties 8.1 CS, DS, DDS, and EDDS: 8.1.1 Typical nonmandatory mechanical properties for CS, DS, DDS and EDDS are shown in Table 3. TABLE 2 Chemical Composition A For Cold Rol
45、led Steel Sheet Designations SS, HSLAS, HSLAS-F, SHS, and BHS % Heat Analysis, Element Maximum Unless Otherwise Shown Designation C Mn P S Al Si Cu B Ni Cr Mo V Cb Ti N SS: C Grade 25 170 0.20 0.60 0.035 0.035 . . . . . . 0.20 0.20 0.15 0.06 0.008 0.008 0.025 . . . Grade 30 205 0.20 0.60 0.035 0.035
46、 . . . . . . 0.20 0.20 0.15 0.06 0.008 0.008 0.025 . . . Grade 33 230 Type 1 0.20 0.60 0.035 0.035 . . . . . . 0.20 0.20 0.15 0.06 0.008 0.008 0.025 . . . Grade 33 230 Type 2 0.15 0.60 0.20 0.035 . . . . . . 0.20 0.20 0.15 0.06 0.008 0.008 0.025 . . . Grade 40 275 Type 1 0.20 1.35 0.035 0.035 . . .
47、. . . 0.20 0.20 0.15 0.06 0.008 0.008 0.025 . . . Grade 40 275 Type 2 0.15 0.60 0.20 0.035 . . . . . . 0.20 0.20 0.15 0.06 0.008 0.008 0.025 . . . Grade 45 310 0.20 1.35 0.070 0.025 0.08 0.60 0.20 0.20 0.15 0.06 0.008 0.008 0.008 0.030 Grade 50 340 0.20 1.35 0.035 0.035 . . . . . . 0.20 0.20 0.15 0.
48、06 0.008 0.008 0.025 . . . Grade 60 410 0.20 1.35 0.035 0.035 . . . . . . 0.20 0.20 0.15 0.06 0.008 0.008 0.025 . . . Grade 70 480 0.20 1.35 0.035 0.035 . . . . . . 0.20 0.20 0.15 0.06 0.008 0.008 0.025 . . . Grade 80 550 0.20 1.35 0.035 0.035 . . . . . . 0.20 0.20 0.15 0.06 0.008 0.008 0.025 . . .
49、HSLAS: D Grade 45 310 Class 1 0.22 1.65 0.04 0.04 . . . . . . 0.20 0.20 0.15 0.06 0.005 min 0.005 min 0.005 min . . . Grade 45 310 Class 2 0.15 1.65 0.04 0.04 . . . . . . 0.20 0.20 0.15 0.06 0.005 min 0.005 min 0.005 min . . . Grade 50 340 Class 1 0.23 1.65 0.04 0.04 . . . . . . 0.20 0.20 0.15 0.06 0.005 min 0.005 min 0.005 min . . . Grade 50 340 Class 2 0.15 1.65 0.04 0.04 . . . . . . 0.20 0.20 0.15 0.06 0.005 min 0.005 min 0.005 min . . . Gra
