1、Designation: A684/A684M 15A684/A684M 17Standard Specification forSteel, Strip, High-Carbon, Cold-Rolled1This standard is issued under the fixed designation A684/A684M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of las
2、t revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope*1.1 This specification covers cold-rol
3、led, high-carbon strip in coils or cut lengths. Strip is classified as product that is 0.3000in. 7.6 mm or less in thickness and over 12 to 231516 in. 12.5 to 600 mm in width, inclusive. Strip tolerance products may beavailable in widths wider than 231516 in. (600 mm) by agreement between purchaser
4、and supplier; however, such products aretechnically classified as cold-rolled sheet. The maximum of the specified carbon range is over 0.25 to 1.35 %, inclusive. It isfurnished in the following types as specified:1.1.1 Soft spheroidized annealed high-carbon steel is intended for applications requiri
5、ng maximum cold forming. It is normallyproduced to give the lowest maximum Rockwell hardness for each grade.1.1.2 Soft annealed high-carbon steel is intended for applications requiring moderate cold forming. It is produced to a maximumRockwell hardness.1.1.3 Intermediate hardness high-carbon steel i
6、s intended for applications where cold forming is slight or a stiff, springy productis needed, or both. It is produced to specified Rockwell hardness ranges, the maximum being higher than obtained for the annealedtype.1.1.4 Full hard high-carbon steel is intended for flat applications. It is produce
7、d to minimum Rockwell hardness requirements,which vary with grade, microstructure and gauge. Full hard can be produced with either a pearlitic or spheroidized microstructureor a mixture of both. The minimum hardness should be established between the consumer and the producer.1.2 This specification i
8、s applicable for orders in either inch-pound units or SI units.1.3 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 used independently of the other. Combin
9、ing values from thetwo systems may result in non-conformance with the standard.1.4 The tolerances in this specification are different than those in Specification A568/A568M and Specification A109/A109M.1.5 For the purpose of determining conformance with this specification, values shall be rounded to
10、 the nearest unit in the righthand place of figures used in expressing the limiting values in accordance with the rounding method of Practice E29.1.6 This specification is expressed in both inch-pound units and SI units. However, unless the order specifies the applicable “M”specification designation
11、 (SI units), the material shall be furnished to inch-pound units. The metric portions of the tables hereinlist permissible variations in dimensions and mass (see Note 1) in SI (metric) units. The values listed are not exact conversionsof the values listed in the inch-pound tables but instead are rou
12、nded or rationalized values. Conformance to SI tolerances ismandatory when the “M” specification is used.NOTE 1The term weight is used when inch-pound units are the standard. However, under SI the preferred term is mass.1.7 This international standard was developed in accordance with internationally
13、 recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A109/A109M Specif
14、ication for Steel, Strip, Carbon (0.25 Maximum Percent), Cold-Rolled1 This specification is under the jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.19on Steel Sheet and Strip.Current edition approved Nov. 1, 2015May
15、 1, 2017. Published November 2015May 2017. Originally approved in 1973. Last previous edition approved in 20142015 asA684/A684M 14.A684/A684M 15. DOI: 10.1520/A0684_A0684M-15. 10.1520/A0684_A0684M-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service
16、 at serviceastm.org. For Annual Book of ASTM Standardsvolume 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 to the previous v
17、ersion. Becauseit 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 versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes s
18、ection appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1A370 Test Methods and Definitions for Mechanical Testing of Steel ProductsA568/A568M Specification for Steel, Sheet, Carbon, Structural, and Hig
19、h-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled,General Requirements forA700 Guide for Packaging, Marking, and Loading Methods for Steel Products for ShipmentA751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel ProductsA941 Terminology Relating to Steel, Stainless Steel, Re
20、lated Alloys, and FerroalloysA1073/A1073M Practice for Using Hand Micrometers to Measure the Thickness of Uncoated Steel Sheet and Nonmetallic andMetallic-Coated Steel SheetE3 Guide for Preparation of Metallographic SpecimensE29 Practice for Using Significant Digits in Test Data to Determine Conform
21、ance with SpecificationsE430 Test Methods for Measurement of Gloss of High-Gloss Surfaces by Abridged Goniophotometry2.2 Federal Standards:Fed. Std. No. 123 Marking for Shipments (Civil Agencies)3Fed. Std. No. 183 Continuous Identification Marking of Iron and Steel Products32.3 Military Standard:MIL
22、-STD-129 Marking for Shipping and Storage32.4 SAE Standard:J 1086 Recommended Practice for Numbering Metals and Alloys (UNS)43. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 burrburr, nmetal displaced beyond the plane of the surface by slitting or shearing.3.1.2 lotlot, nquanti
23、ty of material of the same type, size, and finish produced at one time from the same cast or heat, andheat treated in the same heat-treatment cycle.3.1.3 spheroidizingspheroidizing, nthe heating and cooling of the strip in controlled conditions (annealing) to produce aspheroidal or globular form of
24、carbide microconstituent.3.1.4 stretcher strainsstrains, nelongated markings that appear on the surface of the strip when dead soft (fully annealed)material is deformed beyond its yield point (see 5.2).3.2 Refer to Terminology A941 for additional terms used in this standard.4. Ordering Information4.
25、1 Orders for material under this specification shall include the following information:4.1.1 ASTM designation and date of issue.4.1.2 Name, type, and steel grade number.4.1.3 Hardness (if intermediate or restricted hardness is specified).4.1.4 Decarburization (if required).4.1.5 Application.4.1.6 Di
26、mensions.4.1.7 Coil size requirements.4.1.8 Edge (indicate No. 1 round, square, and so forth).4.1.9 Finish (indicate and specify).4.1.10 Conditions (specify whether material is oiled or dry).4.1.11 Package (bare coils, skid, and so forth).4.1.12 Cast or heat (formerly ladle) analysis report (if requ
27、ired).4.1.12.1 The additional chemical composition requirements (heat analysis) for copper, nickel, chromium, and molybdenum shallbe specified as Limits L or Limits H. If no limits are specified, Limits L will be provided.4.1.12.2 Silicon requirement specified (Type 1, Type 2, or other as agreed bet
28、ween purchaser and producer). If no specificationis supplied, then Type 1 (see Table 1, Footnote A) will be supplied.4.1.13 Special requirements (if required).4.2 Products covered by this specification are produced to decimal thickness only, and decimal thickness tolerances apply.NOTE 2A typical ord
29、ering description is as follows: ASTM A684 dated _ Cold Rolled, High-Carbon Soft, Strip, Spheroidized 1064, 0.042 in.by 6 in. by coil (16 in. ID by 40 in. OD max), No. 5 Edge, No. 2 Finish, Oiled, Bare Skid or “ASTM A684 dated _ Cold Rolled, High-Carbon,Soft, Strip, Spheroidized 1064, 0.6 mm by 200
30、mm by coil (400 mm ID by 7500 mm OD max), No. 3 Edge, No. 2 Finish, Oiled, Bare Skid.”3 Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil.4 Available from Society of Automotive Engineers (SAE), 40
31、0 Commonwealth Dr., Warrendale, PA 15096-0001, http:/www.sae.org.A684/A684M 1725. Manufacture5.1 Condition:5.1.1 The strip shall be furnished cold rolled spheroidized annealed, soft annealed, intermediate hardness, or full hard, asspecified.5.1.2 Intermediate hardness may be obtained by either rolli
32、ng the strip after final annealing or by varying the annealingtreatment, or both.5.2 Pinch PassSpheroidized annealed and annealed material may be pinch rolled after the final anneal to improve flatness,uniformly oil, modify surface, obtain proper mechanical properties, and minimize stretcher strains
33、 if required by the purchaser.6. Chemical Requirements6.1 Limits:6.1.1 When carbon steel strip is specified to chemical composition, the compositions are commonly prepared using the rangesand limits shown in Table 2. The elements comprising the desired chemical composition are specified in one of th
34、ree ways:6.1.1.1 By a maximum limit,6.1.1.2 By a minimum limit, or6.1.1.3 By minimum and maximum limits, termed the “range.” By common usage, the range is the arithmetical differencebetween the two limits (for example, 0.60 to 0.71 is 0.11 range).6.1.2 Steel grade numbers indicating chemical composi
35、tion commonly produced to this specification are shown in Table 1 andmay be used. Table 3 shows requirements for additional elements.6.1.3 Additional elements may be present. Limits on such elements are by agreement between purchaser and supplier.6.1.3.1 Any additional elements specified shall be in
36、cluded in the report of heat analysis.6.2 Heat (Formerly Ladle) Analysis:6.2.1 An analysis of each heat of steel shall be made by the manufacturer to determine the percentage of elements specified orrestricted by the applicable specification.6.2.2 When requested, heat analysis for elements listed or
37、 required shall be reported to the purchaser or to his representative.Each of the elements listed in Tables 1 and 3 and additional elements agreed upon by the purchaser, and the supplier shall beincluded in the report of heat analysis. When the amount of copper, nickel, chromium, or molybdenum is le
38、ss than 0.02 %, theanalysis may be reported as 0.02 %. When the amount of vanadium, columbium, or titanium is less than 0.008 %, the analysismay be reported as 0.008 %. The reported heat analysis shall conform to the chemical composition requirements of theappropriate grade in Table 1, if used, the
39、additional elements in Table 3, and the limits of any other elements agreed upon by thepurchaser and supplier.6.3 Product AnalysisProduct analysis is the chemical analysis of the semi-finished product form. The strip may be subjectedto product analysis by the purchaser either for the purpose of veri
40、fying that the ordered chemical composition is within specifiedlimits for each element as listed in Table 1, including applicable tolerance for product analysis, or to determine variations inTABLE 1 Heat (Formerly Ladle) Analysis Chemical Composition, %SteelDesignationNo.Carbon Manganese Phosphorus,
41、 max Sulfur, max Silicon1030 0.28 to 0.34 0.60 to 0.90 0.030 0.035 A1035 0.32 to 0.38 0.60 to 0.90 0.030 0.035 A1040 0.37 to 0.44 0.60 to 0.90 0.030 0.035 A1045 0.43 to 0.50 0.60 to 0.90 0.030 0.035 A1050 0.48 to 0.55 0.60 to 0.90 0.030 0.035 A1055 0.50 to 0.60 0.60 to 0.90 0.030 0.035 A1060 0.55 to
42、 0.65 0.60 to 0.90 0.030 0.035 A1064B 0.59 to 0.70 0.50 to 0.80 0.030 0.035 A1065 0.60 to 0.70 0.60 to 0.90 0.030 0.035 A1070 0.65 to 0.75 0.60 to 0.90 0.030 0.035 A1074 0.70 to 0.80 0.50 to 0.80 0.030 0.035 A1075 0.70 to 0.80 0.40 to 0.70 0.030 0.035 A1080 0.75 to 0.88 0.60 to 0.90 0.030 0.035 A108
43、5 0.80 to 0.93 0.70 to 1.00 0.030 0.035 A1086 0.80 to 0.93 0.30 to 0.50 0.030 0.035 A1095 0.90 to 1.03 0.30 to 0.50 0.030 0.035 AA Silicon composition as one of the following:Type 1: 0.150.30Type 2: 0.10 maxOr other silicon ranges are permissible when agreed upon by purchaser and producer.B 1064 is
44、not an SAE steel grade.A684/A684M 173compositions within a cast or heat. The results of analyses taken from different pieces within a heat may differ from each otherand from the cast analysis. The chemical composition thus determined shall not vary from the limits specified by more than theamounts s
45、hown in Table 4.6.4 Methods of AnalysisTest Methods, Practices, and Terminology A751 shall be used for referee purposes.7. Metallurgical Structure7.1 Grain Size:7.1.1 Unless otherwise specified, the steel strip shall be manufactured to a fine grain (austenitic and ferritic) practice.7.1.2 Pearlite i
46、s the normal structure of cold rolled high-carbon strip unless it has had an intermediate anneal.7.2 Decarburization:7.2.1 When specified, the steel strip shall have a maximum permissible depth of complete plus partial decarburization of 0.001in. 0.025 mm or 1.5 % of the thickness of the strip, whic
47、hever is greater, except that strip less than 0.011 in. 0.279 mm thickshall show no complete decarburization.7.3 Annealed is mostly a spheroidized structure, but may contain some vestiges of pearlite.TABLE 2 Heat (Formerly Ladle) Analysis Limits and RangesElementStandard Chemical Limitsand Ranges, L
48、imit or Maxof Specified RangeRange, %CarbonA over 0.25 to 0.30, incl 0.06over 0.30 to 0.40, incl 0.07over 0.40 to 0.60, incl 0.08over 0.60 to 0.80, incl 0.11over 0.80 to 1.35, incl 0.14Manganese to 0.50, incl 0.20over 0.50 to 1.15, incl 0.30over 1.15 to 1.65, incl 0.35Phosphorous to 0.08, incl 0.03o
49、ver 0.08 to 0.15, incl 0.05Sulfur to 0.08, incl 0.03over 0.08 to 0.15, incl 0.05over 0.15 to 0.23, incl 0.07over 0.23 to 0.33, incl 0.10Silicon to 0.20, incl 0.10over 0.20 to 0.30, incl 0.15over 0.30 to 0.60, incl 0.30A The carbon ranges shown in the column headed “Range” apply when thespecified maximum limit for manganese does not exceed 1.00 %. When themaximum manganese limit exceeds 1.00 %, add 0.01 to the carbon ranges shownabove.TABLE 3 Additional Chemical Composition RequirementsHeatAnalysisElement CompositionWeight %AluminumA . .
