1、Designation: A684/A684M 12A684/A684M 14Standard 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. in. 12.5 to 600 mm 600 mm in width, inclusive. Strip toleranceproducts may be available in widths wider than 231516 in. (600 mm) in. (600 mm) by agre
4、ement between purchaser and supplier;however, such products are technically classified as cold-rolled sheet. The maximum of the specified carbon range is over 0.25 to1.35 %, inclusive. It is furnished in the following types as specified:1.1.1 Soft spheroidized annealed high-carbon steel is intended
5、for applications requiring 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 hard
6、ness high-carbon steel is 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 app
7、lications. It is produced 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.
8、1.2 This specification is 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 independen
9、tly of the other. Combining 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, va
10、lues shall be rounded to 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”s
11、pecification designation (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 ta
12、bles but instead are rounded 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.2. Referenced Documents2.1 ASTM Standards:2A109/A109M Sp
13、ecification for Steel, Strip, Carbon (0.25 Maximum Percent), Cold-RolledA370 Test Methods and Definitions for Mechanical Testing of Steel Products1 This specification is under the jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcom
14、mittee A01.19on Steel Sheet and Strip.Current edition approved May 1, 2012Oct. 1, 2014. Published May 2012October 2014. Originally approved in 1973. Last previous edition approved in 20102012 asA684/A684M 10a.A684/A684M 12. DOI: 10.1520/A0684_A0684M-12.10.1520/A0684_A0684M-14.2 For referencedASTM st
15、andards, visit theASTM website, www.astm.org, or contactASTM Customer Service 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
16、 ASTM standard an indication of what changes have been made to the previous version. 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 publis
17、hed by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1A568/A568M Specification for Steel, Sheet, Carbon, Structural, and
18、High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled,General Requirements forA700 Practices for Packaging, Marking, and Loading Methods for Steel Products for Shipment (Withdrawn 2014)3A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel ProductsA941 Terminology Relating to S
19、teel, Stainless Steel, Related Alloys, and FerroalloysE3 Guide for Preparation of Metallographic SpecimensE29 Practice for Using Significant Digits in Test Data to Determine Conformance with SpecificationsE112 Test Methods for Determining Average Grain SizeE527 Practice for Numbering Metals and Allo
20、ys in the Unified Numbering System (UNS)2.2 Federal Standards:Fed. Std. No. 123 Marking for Shipments (Civil Agencies)4Fed. Std. No. 183 Continuous Identification Marking of Iron and Steel Products42.3 Military Standard:MIL-STD-129 Marking for Shipping and Storage42.4 SAE Standard:J 1086 Recommended
21、 Practice for Numbering Metals and Alloys (UNS)53. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 burrmetal displaced beyond the plane of the surface by slitting or shearing.3.1.2 lotquantity of material of the same type, size, and finish produced at one time from the same cast
22、or heat, and heat treatedin the same heat-treatment cycle.3.1.3 spheroidizingthe heating and cooling of the strip in controlled conditions (annealing) to produce a spheroidal or globularform of carbide microconstituent.3.1.4 stretcher strainselongated markings that appear on the surface of the strip
23、 when dead soft (fully annealed) material isdeformed beyond its yield point (see 5.2).3.2 Refer to Terminology A941 for additional terms used in this standard.4. Ordering Information4.1 Orders for material under this specification shall include the following information:4.1.1 ASTM designation and da
24、te of issue,issue.4.1.2 Name, type, and steel grade number,number.4.1.3 Hardness (if intermediate or restricted hardness is specified),specified).4.1.4 Decarburization (if required),required).4.1.5 Application,Application.4.1.6 Dimensions,Dimensions.4.1.7 Coil size requirements,requirements.4.1.8 Ed
25、ge (indicate No. 1 round, square, etc.),and so forth).4.1.9 Finish (indicate and specify),specify).4.1.10 Conditions (specify whether material is oiled or dry),dry).4.1.11 Package (bare coils, skid, etc.),and so forth.).4.1.12 Cast or heat (formerly ladle) analysis report (if required), required).4.
26、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 between pur
27、chaser and producer). If no specificationis supplied, then Type 1 (see Table 1, Footnote B)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 ordering
28、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 No. 2 Finish, Oiled, Bare Skid or “ASTM A684 dated _ Cold Rolled,High-Carbon, Soft, Strip, Spheroidized 1064, 0.6 mm by 200
29、mm by coil (400 mm ID by 7500 mm OD max), No. 3 Edge, No. 2 Finish, Oiled, BareSkid.”3 The last approved version of this historical standard is referenced on www.astm.org.4 Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098,
30、 http:/www.dodssp.daps.mil.5 Available from Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001, http:/www.sae.org.A684/A684M 142TABLE 2 Rockwell Hardness Testing Ranges for Cold-Rolled High-Carbon Steel StripRockwell “B” and “T” Scales Rockwell “C” and “N” ScalesT
31、hickness Scale Thickness ScaleOver 0.030 in.over 0.8 mmB Over 0.040 in.over 1.0 mmC0.020 to 0.030 in.0.5 to 0.8 mm30T 0.025 to 0.040 in.0.6 to 1.0 mm30NUnder 0.020 in.under 0.5 mm15T Under 0.025 in.under 0.6 mm15NTABLE 3 Cold Bending RequirementsA,B for Spheroidized, Annealed, and Soft-Annealed Cold
32、-Rolled Carbon Steel StripType Degree ofBendInsideRadius toThicknessRelation of BendTest Specimen toRolling DirectionAnnealed 180 3t transverseCSpheroidized 180 2t transverseCA Up to 0.100 in. 2.5 mm, incl, thickness maximum. When bend radius for thickness is over 0.100 in. 2.5 mm the producer shoul
33、d be consulted. These ratios apply tobending performance of the test specimen.B These bend tests apply to the bending performance of test specimens only. Where material is to be bent in fabricating operations a more liberal bend radius may berequired and should be based on prior experience or consul
34、tation with the steel producer, or both.C If finished strip width prohibits taking a transverse bend test specimen, a longitudinal specimen may be substituted, except the bend radius shall be reduced by 1 t.TABLE 4 Heat (Formerly Ladle) Analysis Limits and RangesElementStandard Chemical Limitsand Ra
35、nges, Limit 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, inc
36、l 0.03over 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 the speci
37、fied maximum limit for manganese does not exceed 1.00 %. When the maximummanganese limit exceeds 1.00 %, add 0.01 to the carbon ranges shown above.TABLE 1 Heat (Formerly Ladle) Analysis Chemical Composition, %SteelDesignationNo.Carbon Manganese Phosphorus, max Sulfur, max Silicon1030 0.28 to 0.34 0.
38、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 0.65 0.60 to 0.90 0.030 0.035 A1064B 0.59 t
39、o 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 A1085 0.80 to 0.93 0.70 to 1.00 0.030 0.035 A108
40、6 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: 0.15 0.300.150.30Type 2: 0.10 maxOr other silicon ranges are permissible when agreed upon by purchaser and producer.B 1064 is not an SAE steel grade.A684/A684M 1
41、435. 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 rolling the strip after final annealing or by varying the annealingtreatment, or b
42、oth.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 if required by the purchaser.6. Chemical Requirements6.1 Limits:6.1.1 When c
43、arbon 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 three ways:6.1.1.1 By a maximum limit,6.1.1.2 By a minimum limit, or6.1.1.3 By
44、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 composition commonly produced to this specification are shown in Table 31 andmay be
45、used. Table 43 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 included in the report of heat analysis.6.2 Heat (Formerly Ladle) Analysis:6.
46、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 required shall be reported to the purchaser or to his representative.Each
47、of the elements listed in Tables 31 and 43 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 less than 0.02 %, theanalysis may be reported as 0.02 %. When the amount of
48、 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 31, if used, the additional elements in Table 43, and the limits of any other elements ag
49、reed upon bythe purchaser and supplier.TABLE 2 Heat (Formerly Ladle) Analysis Limits and RangesElementStandard Chemical Limitsand Ranges, Limit 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 0.03over 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.
