ASTM A1008.pdf

Designation: A 1008/A 1008M 01a Standard Specifi cation for Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy and High-Strength Low-Alloy with Improved Formability1 This standard is issued under the fi xed designation A 1008/A 1008M; the 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 (e) indicates an editorial change since the last revision or reapproval. 1. Scope 1.1 This specifi cation covers cold rolled structural, high- strength low-alloy, and high-strength low-alloy with improved formability steel sheet, in coils and cut lengths. 1.2 Cold rolled steel sheet is available in the designations as listed in 4.1. 1.3 This specifi cation does not apply to steel strip as described in Specifi cation A 109. 1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. 2. Referenced Documents 2.1 ASTM Standards: A 109 Specifi cation for Steel, Strip, Carbon, Cold Rolled2 A 366/A 366M Specifi cation for Commercial Steel (CS), Sheet, Carbon (0.15 Maximum Percentage), Cold-Rolled3 A 370 Test Methods and Defi nitions for Mechanical Testing of Steel Products4 A 568/A 568M Specifi cation for Steel, Sheet, Carbon, and High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled, General Requirements for4 A 620/A 620M Specifi cation for Drawing Steel (DS), Sheet, Carbon, Cold-Rolled3 A 941 Terminology Relating to Steel, Stainless Steel, Re- lated Alloys, and Ferroalloys5 E 517 Test Method for Plastic Strain Ratio r for Sheet Metal6 E 646 Test Method for Tensile Strain-Hardening Exponents (n-Values) of Metallic Sheet Materials6 3. Terminology 3.1 Defi nitions: 3.1.1 For defi nitions of other terms used in this specifi ca- tion, refer to Terminology A 941. 3.1.2 stabilizationthe addition of one 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. 3.1.2.1 DiscussionStabilizing improves formability and increases resistance to aging. 3.1.3 vacuum degassinga process of refi ning 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. 3.2 Defi nitions of Terms Specifi c to This Standard: 3.2.1 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. 3.2.1.1 DiscussionAging increases the tendency of a steel to exhibit stretcher strains and fl uting. 4. Classifi cation 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 (DS Types A and B), NOTE1CS Type B and DS Type B describe the most common product previously included, respectively, in Specifi cations A 366/ A 366M and A 620/A 620M. 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, 40275 Types 1 and 2, 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 Form- ability (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 1 This specifi cation 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 Sept. 10, 2001. Published October 2001. Originally published as A 1008/A 1008M - 00. Last previous edition A 1008/A 1008M - 01. 2Discontinued and replaced by A 109/A 109M. See 1997 Annual Book of ASTM Standards, Vol. 01.03. 3Discontinued; see 2000 Annual Book of ASTM Standards, Vol 01.03. Replaced by A 1008/A 1008M. 4Annual Book of ASTM Standards, Vol 01.03. 5Annual Book of ASTM Standards, Vol 01.01. 6Annual Book of ASTM Standards, Vol 03.01. 1 Copyright ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States. COPYRIGHT ASTM International Licensed by Information Handling Services COPYRIGHT ASTM International Licensed by Information Handling Services fi ne grain practice and includes microalloying elements such as columbium, vanadium, zirconium, etc. The steel may be treated to achieve inclusion control. 4.2 Cold-rolled steel sheet is supplied for either exposed or unexposed applications. Within the latter category, cold-rolled sheet is specifi ed either “temper rolled” or “annealed last.” For details on processing, attributes and limitations, and inspection standards, refer to Specifi cation A 568/A 568M. 5. Ordering Information 5.1 It is the purchasers responsibility to specify in the purchase order all ordering information necessary to describe the required material. Examples of such information include, but are not limited to, the following: 5.1.1 ASTM specifi cation number and year of issue, 5.1.2 Name of material and designation (cold-rolled steel sheet) (include grade, type, and class, as appropriate, for CS, DS, DDS, EDDS, SS, HSLAS, or HSLAS-F) (see 4.1), 5.1.2.1 When a type is not specifi ed for CS or DS, Type B will be furnished (see 4.1), 5.1.2.2 When a class is not specifi ed for HSLAS, Class 1 will be furnished (see 4.1), 5.1.2.3 When a type is not specifi ed for SS33230 and SS40275, Type 1 will be furnished (see 4.1), 5.1.3 Classifi cation (either exposed, unexposed, temper rolled, or annealed last) (see 4.2), 5.1.4 Finish (see 9.1), 5.1.5 Oiled or not oiled, as required (see 9.2), 5.1.6 Dimensions (thickness, thickness tolerance table (see 5.1.6.1), width, and whether cut lengths or coils), 5.1.6.1 As agreed upon between the purchaser and the producer, material ordered to this specifi cation will be supplied to meet the applicable thickness tolerance table shown in Specifi cation A 568/A 568M, NOTE2Not all producers are capable of meeting all the limitations of the thickness tolerance tables in Specifi cation A 568/A 568M. The pur- chaser should contact the producer regarding possible limitations prior to placing an order. 5.1.7 Coil size (must include inside diameter, outside diam- eter, and maximum weight), 5.1.8 Copper bearing steel (if required), 5.1.9 Quantity, 5.1.10 Application (part identifi cation and description), 5.1.11 Special requirements (if required), or supplementary requirement S1 for HSLAS, and 5.1.12 A report of heat analysis will be supplied, if re- quested, for CS, DS, DDS, and EDDS. For materials with required mechanical properties, SS, HSLAS, and HSLAS-F, a report is required of heat analysis and mechanical properties as determined by the tension test. NOTE3A typical ordering description is as follows: ASTM A 1008-XX, cold rolled steel sheet, CS Type A, exposed, matte fi nish, oiled, 0.035 by 30 in. by coil, ID 24 in., OD 48 in., max weight 15 000 lbs, thickness tolerance Table 18 of Specifi cation A 568/A 568M, 100 000 lb, for part No. 4560, Door Panel. or: ASTM A 1008M-XX, cold-rolled steel sheet, SS grade 275, unexposed, matte fi nish, oiled, 0.88 mm by 760 mm by 2440 mm, thickness tolerance Table A1.15 of Specifi cation A 568/A 568M, 10 000 kg, for shelf bracket. 6. General Requirements for Delivery 6.1 Material furnished under this specifi cation shall con- form to the applicable requirements of the current edition of Specifi cationA 568/A 568M 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 desig- nation shown in Table 1 for CS, DS, DDS, and EDDS and in Table 2 for SS, HSLAS, and HSLAS-F. 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 TABLE 1 Chemical CompositionA For Cold Rolled Steel Sheet Designations CS, DS, DDS, and EDDS Composition, % Heat Analysis (Element Maximum Unless Otherwise Shown DesignationCMnPSAlSiCuBNiBCrB,CMoBVCbTiN CS Type AD,E,F,G0.100.600.0300.035. . . . .0.20H0.200.150.060.0080.0080.008I. . . CS Type BD0.02 to 0.15 0.600.0300.035. . . . .0.20H0.200.150.060.0080.0080.008I. . . CS Type CD,E,F,G0.080.600.100.035. . . . .0.20H0.200.150.060.0080.0080.008I. . . DS Type AE,J0.080.500.0200.0300.01 min. . .0.200.200.150.060.0080.0080.008I. . . DS Type B0.02 to 0.08 0.500.0200.0300.02 min. . .0.200.200.150.060.0080.0080.008I. . . DDSF,G0.060.500.0200.0250.01 min. . .0.200.200.150.060.0080.0080.008I. . . EDDSK0.020.400.0200.0200.01 min. . .0.100.100.150.030.0080.100.15. . . AWhere an ellipsis (. . .) appears in the table, there is no requirement, but the analysis result shall be reported. B The sum of copper, nickel, chromium, and molybdenum shall not exceed 0.50 % on heat analysis. When one or more of these elements is specifi ed by the purchaser, the sum does not apply, in which case only the individual limits on the remaining elements shall apply. CChromium is permitted, at the producers option, to 0.25 % maximum when the carbon content is less than or equal to 0.05 %. In such case the limit on the sum of the four elements in Footnote B does not apply. DWhen an aluminum deoxidized steel is required for the application, Commercial Steel (CS) may be ordered to a minimum of 0.01 % total aluminum. ESpecify Type B to avoid carbon levels below 0.02 %. FMay be furnished as a vacuum degassed or chemically stabilized steel, or both, at the producers option. GFor carbon levels less than or equal to 0.02 %, columbium or titanium, or both, may be used as stabilizing elements at the producers option. In such cases, the applicable limit for columbium shall be 0.10 % max. and the limit on titanium shall be 0.15 % max. H When copper steel is specifi ed, the copper limit is a minimum requirement. When copper steel is not specifi ed, the copper limit is a maximum requirement. I Except for EDDS, titanium is permitted, at producers option, to 0.025 % provided the ratio of % titanium to % nitrogen does not exceed 3.4. JDS Type A may be furnished as a vacuum degassed steel, at the producers option. KShall be furnished as a vacuum degassed and stabilized steel. A 1008/A 1008M 2 COPYRIGHT ASTM International Licensed by Information Handling Services COPYRIGHT ASTM International Licensed by Information Handling Services 0.02 %, the analysis may be reported as < 0.02 %. When the amount of vanadium, columbium, or titanium is less than 0.008 %, the analysis may be reported as < 0.008 %. 7.3 Sheet steel grades defi ned by this specifi cation are suitable for welding if appropriate welding conditions are selected. For certain welding processes, more restrictive com- position limits may be desirable and should be requested at the time of inquiry and ordering. 8. 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. 8.1.2 The material shall be capable of being bent, at room temperature, in any direction through 180 fl at on itself without cracking on the outside of the bent portion (see Section 14 of Test Methods and Defi nitions A 370). 8.1.3 Sheet of these designations except for EDDS may be subject to aging dependent upon processing factors such as the method of annealing (continuous annealing or box annealing), and chemical composition. For additional information on aging, see Appendix X1 of Specifi cation A 568/A 568M. 8.1.4 EDDS steel is stabilized to be nonaging and so is not subject to stretcher strains and fl uting. Other steels may be processed to be nonaging; please consult your supplier. TABLE 2 Chemical CompositionA For Cold Rolled Steel Sheet Designations SS, HSLAS, and HSLAS-F % Heat Analysis, Element Maximum unless otherwise shown DesignationCMnPSAlSiCuB,CNiBCrBMoBVCbN SS: Grade 25 1700.200.600.0350.035. . . . .0.200.200.150.060.0080.008. . . Grade 30 2050.200.600.0350.035. . . . .0.200.200.150.060.0080.008. . . Grade 33 230 Type 10.200.600.0350.035. . . . .0.200.200.150.060.0080.008. . . Grade 33 230 Type 20.150.600.200.035. . . . .0.200.200.150.060.0080.008. . . Grade 40 275 Type 10.200.900.0350.035. . . . .0.200.200.150.060.0080.008. . . Grade 40 275 Type 20.150.600.200.035. . . . .0.200.200.150.060.0080.008. . . Grade 80 5500.200.600.0350.035. . . . .0.200.200.150.060.0080.008. . . HSLAS:D Grade 45 310 Class 10.221.650.040.04. . . . .0.200.200.150.060.01 min0.005 min. . . Grade 45 310 Class 20.151.650.040.04. . . . .0.200.200.150.060.01 min0.005 min. . . Grade 50 340 Class 10.231.650.040.04. . . . .0.200.200.150.060.01 min0.005 min. . . Grade 50 340 Class 20.151.650.040.04. . . . .0.200.200.150.060.01 min0.005 min. . . Grade 55 380 Class 10.251.650.040.04. . . . .0.200.200.150.060.01 min0.005 min. . . Grade 55 380 Class 20.151.650.040.04. . . . .0.200.200.150.060.01 min0.005 min. . . Grade 60 410 Class 10.261.650.040.04. . . . .0.200.200.150.060.01 min0.005 min. . . Grade 60 410 Class 20.151.650.040.04. . . . .0.200.200.150.060.01 min0.005 min0.020 Grade 65 450 Class 10.261.650.040.04. . . . .0.200.200.150.060.01 min0.005 min0.012 Grade 65 450 Class 20.151.650.040.04. . . . .0.200.200.150.060.01 min0.005 min0.020 Grade 70 780 Class 10.261.650.040.04. . . . .0.200.200.150.060.01 min0.005 min0.012 Grade 70 780 Class 20.151.650.040.04. . . . .0.200.200.150.060.01 min0.005 min0.020 HSLAS-F:E Grade 50340, 60410, 70480, and 805500.151.650.0200.025. . . . .0.200.200.150.06. . . . . . . AWhere an ellipsis (. . .) appears in the table, there is no requirement but, the analysis shall be reported. B The sum of copper, nickel, chromium, and molybdenum shall not exceed 0.50 %. When one or more of these elements are specifi ed by the purchaser, the sum does not apply, in which case, only the individual limits on the remaining unspecifi ed elements will apply. C When copper is specifi ed, the copper limit is a minimum requirement. When copper steel is not specifi ed, the copper limit is a maximum requirement. DFor HSLAS steels, columbium and vanadium may be added singly or in combination. EThese steels shall also contain one or more of the following elements: Vanadium, Titanium, and Columbium. Other alloying elements may be present, but are not required. TABLE 3 Typical Ranges of Mechanical PropertiesA (Nonmandatory)B For Cold Rolled Steel Sheet Designations CS, DS, DDS and EDDS DesignationYield StrengthCElongation in 2 in. 50 mm %C rmValueDn-ValueE ksiMPa C