1、Designation: A 623 06aStandard Specification forTin Mill Products, General Requirements1This standard is issued under the fixed designation A 623; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number
2、in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This specification covers a group of common require-ments w
3、hich, unless otherwise specified in the purchase orderor in an individual specification, shall apply to tin millproducts.1.2 In case of any conflict in requirements, the requirementsof the purchase order, the individual material specification, andthis general specification shall prevail in the seque
4、nce named.NOTE 1A complete metric companion to Specification A 623 hasbeen developedSpecification A 623M; therefore no metric equivalentsare presented in this specification.1.3 The following safety caveat pertains to Annex A3through Annex A10 of this specification: This standard doesnot purport to a
5、ddress all of the safety concerns, if any,associated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations priorto use.2. Referenced Documents2.1 ASTM Standards:2A 370 Test Meth
6、ods and Definitions for Mechanical Testingof Steel ProductsA 700 Practices for Packaging, Marking, and LoadingMethods for Steel Products for ShipmentA 987 Test Method for Measuring Shape Characteristics ofTin Mill ProductsD 1125 Test Methods for Electrical Conductivity and Re-sistivity of WaterE18 T
7、est Methods for Rockwell Hardness of MetallicMaterialsE112 Test Methods for Determining Average Grain Size2.2 U.S. Military Standards:3MIL-STD-129 Marking for Shipment and StorageMIL-STD-163 Steel Mill Products, Preparation for Markingand Storage2.3 U.S. Federal Standard:Federal Std. No. 123 Marking
8、 for Shipment (Civil Agen-cies)33. Terminology3.1 Definitions:3.1.1 base box, na unit of area equivalent to 112 sheets 14by 20 in. or 31 360 in.2(217.78 ft2) (see Annex A1).3.1.2 base weight, na term used to describe the thicknessof tin mill products. The designated base weight multiplied bya factor
9、 of 0.00011 is the nominal decimal thickness, in inchesof the material. Although it is customary industry-wide to usethe term “pound” (for example, 75 lb), following the baseweight designation, base weight is correctly used only to definenominal material thickness, and is not a measure of the weight
10、of a base box.3.1.3 black plate, nlight-gage, low-carbon, cold-reducedsteel intended for use in the untinned state or for the productionof other tin mill products. It is supplied only in a dry or oiledcondition.3.1.4 box annealing, na process involving slow heating ofcoils to a subcritical temperatu
11、re, holding, and cooling there-from, to soften the strip and relieve stresses produced duringcold reduction. It is accomplished in a sealed container. Byintroducing and maintaining an inert or slightly reducingatmosphere during the cycle, a relatively bright surface isobtained.3.1.5 bright finish, n
12、a surface that has a melted tincoating.3.1.6 bundle, na unit containing two or more packages ofa cut size, supported by a platform, generally consisting of tenor more packages. (Also commonly referred to as a multiple-package lift containing two or more packages.)1This specification is under the jur
13、isdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.20 on Tin Mill Products.Current edition approved Oct. 1, 2006. Published October 2006. Originallyapproved in 1968. Last previous edition approved in 2006 as A 623 - 06.2For
14、 referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Standardization Documents Order Desk, Bldg. 4 Sec
15、tion D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.1*A 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.3.1.7 burr, nmetal displaced beyond the plane of thes
16、urface by slitting or shearing (see 9.1.7 and 9.2.6).3.1.8 camber, nthe greatest deviation of a coil edge froma straight line. The measurement is taken on the concave sideand is the perpendicular distance from a straight line to thepoint of maximum deviation (see 9.1.9 and 9.2.7).3.1.9 chemical trea
17、tment, electrolytic tin plate, na passi-vating chemical treatment applied to the surface of electrolytictin plate to stabilize the plate surface characteristics compatiblewith a specified end use (see Annex A8 and Annex A10).3.1.10 chemically treated steel, nlight-gage, low-carbon,cold-reduced steel
18、 that has a passivating or chemical treatmentapplied to the surface to provide rust resistance or retardunderfilm corrosion, or both.3.1.11 cold reductionthe process of reducing the thick-ness of the strip cold, generally accomplished by one rollingthrough a series of four-high mills arranged in tan
19、dem.3.1.12 continuous annealinga process consisting of pass-ing the cold-reduced strip continuously and in a single thick-ness through a series of vertical passes within a furnaceconsisting of heating, soaking, and cooling zones to soften thestrip and relieve stresses produced during cold reduction.
20、 Aninert or slightly reducing atmosphere is maintained in thefurnace to obtain a relatively bright strip.3.1.13 differentially coated tin plateelectrolytic tin platewith a different weight of tin coating on each surface.3.1.14 double-reduced plateplate given a second majorcold reduction following an
21、nealing.3.1.15 electrolytic chromium-coated steellight-gage, low-carbon, cold-reduced steel on which chromium and chromiumoxides have been electrodeposited.3.1.16 electrolytic tin platelight-gage, low-carbon, cold-reduced steel on which tin has been electrodeposited by an acidor alkaline process.3.1
22、.16.1 J Plateelectrolytic tin plate, No. 50 or heavier tincoating, with improved corrosion performance for some gal-vanic detinning food products as specified in the table follow-ing 3.1.16.2 and as measured by the Special Property Tests forPickle Lag (PL) (see Annex A3), Iron Solution Values (ISV)(
23、see Annex A5), Tin Crystal Size (TCS) (see Annex A4). Thealloy layer is normally light in color, characteristic of the acidtinning process.3.1.16.2 K Plateelectrolytic tin plate, No. 50 or heaviertin coating, with improved corrosion performance for somegalvanic detinning food products as specified i
24、n the followingtable and as measured by the Special Property Tests for PickleLag (PL) (seeAnnexA3), Iron SolutionValue (ISV) (seeAnnexA5), Tin Crystal Size (TCS) (see Annex A4), and Alloy TinCouple (ATC) (see Annex A6) and Aerated Media Polarization(AMP) (see Annex A9).Special Properties AimsPickle
25、Lag 10 s maxIron Solution Value 20 g Iron maxTin Crystal Size ASTM No. 9 or largerAlloy Tin CoupleA0.12 A/cm2maxAGood mill practice has demonstrated the ability to average 0.05 A/cm2or lessover an extended period of production.3.1.16.3 DiscussionThe production of J Plate and K Platerequire special p
26、rocessing and testing. In order to receive JPlate or K Plate, this requirement must be specified on theorder.3.1.17 length dimensionthe longer dimension of a cutsize.3.1.18 loteach 20 000 sheets or part thereof or theequivalent in coils, of an item in a specific shipment having thesame order specifi
27、cations.3.1.19 matte finisha surface that has an unmelted tincoating, generally on a shot-blast finish (SBF) base steel.3.1.20 mechanical designationan arbitrary number todesignate Rockwell hardness and ultimate tensile strengthcharacteristics for double-reduced plate (see 8.2).3.1.21 oilinga lubric
28、ant film applied to both surfaces ofthe plate.3.1.22 packagea unit quantity of 112 sheets.3.1.23 passivating treatmenta surface chemical treatment(see 3.1.9).3.1.24 ratiothe number of base boxes in a package of agiven size (see 3.1.1 and Annex A1).3.1.25 Rockwell hardness testa test for determining
29、hard-ness (see Annex A2).3.1.26 rolling widththe dimension of the sheet perpen-dicular to the rolling direction.3.1.27 single-reduced plateplate produced with one majorcold reduction.3.1.28 steel Type Dbase-metal steel aluminum killed,sometimes required to minimize severe fluting and stretcher-strai
30、n hazards or for severe drawing applications (see Table 1).3.1.29 steel Type Lbase-metal steel, low in metalloids andresidual elements, sometimes used for improved internal cor-rosion resistance for certain food-product containers (see Table1).3.1.30 steel Type MRbase-metal steel, similar in metallo
31、idcontent to Type L but less restrictive in residual elements,commonly used for most tin mill products (see Table 1).3.1.31 surface appearancevisual characteristics deter-mined primarily by the steel surface finish. For electrolytic tinTABLE 1 Chemical Requirements for Tin Mill ProductsElementCast C
32、omposition, max %Type D Type L Type MRCarbon 0.12 0.13 0.13Manganese 0.60 0.60 0.60Phosphorus 0.020 0.015 0.020Sulfur 0.03 0.03 0.03SiliconA,B0.020 0.020 0.020Copper 0.20 0.06 0.20Nickel 0.15 0.04 0.15Chromium 0.10 0.06 0.10Molybdenum 0.05 0.05 0.05AluminumC0.20 0.10 0.20Other elements, each 0.02 0.
33、02 0.02AWhen steel produced by the silicon killed method is ordered, the siliconmaximum may be increased to 0.080 %.BWhen strand cast steel produced by the aluminum killed method is ordered orfurnished, the silicon maximum may be increased to 0.030 % when approved bythe purchaser.CTypes L and MR may
34、 be supplied as non-killed or killed which wouldrespectively be produced without and with aluminum additions. Minimum alumi-num level for Type D is usually 0.02 %.A 623 06a2plate, the appearance is also influenced by the weight ofcoating and by melting or not melting the tin coating.3.1.32 surface f
35、inishessteel surface finishes for tin millproducts imparted by the finishing-mill work rolls. These maybe either ground or blasted-roll finishes.3.1.33 temper designationan arbitrary number to desig-nate a Rockwell hardness range for single-reduced productswhich indicates the forming properties of t
36、he plate (see Section8 and Tables 2 and 3).3.1.34 temper milla mill for rolling basemetal steel afterannealing to obtain proper temper, flatness, and surface finish.It may consist of one stand or two stands arranged in tandem.3.1.35 tin coating weightthe weight of tin applied to thesteel surface, us
37、ually stated as pounds per base box, distributedevenly over both surfaces of a base box, the total coated areabeing 62 720 in.2Thus 0.25 lb/bb has a nominal weight of0.125 lb on each of the two surfaces. Frequently, the coating isreferred to as a designation number, and the decimal point isomitted.
38、Thus, 0.25 lb/bb is 25.3.1.35.1 For differentially coated tin plate, twice the nomi-nal coating weight on each side is designated, usually by thenumber method; hence, 10/25 designates the nominal weight of0.05 lb/bb on one side and 0.125 lb/bb on the other side.3.1.36 vapor vacuum depositionthe cond
39、ensation and so-lidification of the metal or metal containing vapors, under highvacuum, to form deposits onto a steel surface.3.1.37 width dimensionthe shorter dimension of a cutsize.4. Base Metal4.1 The steel shall be made by the open-hearth, electric-furnace, or basic-oxygen process.5. Chemical Co
40、mposition5.1 The steel shall conform to the chemical compositionrequirements as prescribed in Table 1 except as otherwiseagreed upon between the manufacturer and the purchaser.6. Cast or Heat Analysis6.1 For Type D, MR, and L an analysis of each heat of steelshall be made by the supplier to determin
41、e the percentage ofcarbon, manganese, phosphorus, sulfur, silicon, and residualelements shown in Table 1. Other elements, unless agreed uponbetween the manufacturer and the purchaser, individually shallnot exceed 0.02 %, maximum and while not necessarilyanalyzed are dependent on the suppliers practi
42、ces and con-trols.7. Product Analysis7.1 Rimmed or capped steels are characterized by a lack ofuniformity in their chemical composition, and for this reason,product analysis is not technologically appropriate unlessmisapplication is clearly indicated.8. Mechanical Requirements Mechanical Requirement
43、s8.1 Single-Reduced Tin Mill Products, TemperThe termtemper when applied to single-reduced tin mill productssummarizes a combination of interrelated mechanical proper-ties. No single mechanical test can measure all the variousfactors which contribute to the fabrication characteristics of thematerial
44、. The Rockwell 30T hardness value is a quick testwhich serves as a guide to the properties of the plate. This testforms the basis for a system of temper designations as shownin Tables 2 and 3. A given temper shall have hardness valuesTABLE 2 Temper Designations and Hardness ValuesSingle-Reduced Tin
45、Mill ProductsBox AnnealedNOTE 1Thinner plate (0.0083 in. ordered thickness and lighter) isnormally tested using the Rockwell 15T scale and the results converted tothe Rockwell 30T scale (see Annex A2 and Table A2.1).TemperDesig-nationRockwell Hardness ValuesAll Thicknesses HR30TACharacteristicsand T
46、ypicalEnd UsesNominal RangeT-1 (T49) 49 4553 soft for drawing parts such asnozzles, spouts, and oil filtershellsT-2 (T53) 53 4957 moderately soft for drawingshallow parts such as rings,plugs, and pie pansT-3 (T57) 57 5361 fairly stiff for parts such as canends and bodies, closures, andcrown capsT-4
47、(T61) 61 5765 increased stiffness for canends and bodies, crown caps,and large closuresAThese ranges are based on the use of the diamond spot anvil and a116 in.hardened steel ball indenter.Test conditions:1. For referee purposes, samples of blackplate, unreflowed ETP, and ECCS shallbe aged prior to
48、testing by holding at 400F for 10 min.2. The hardness test area on material produced with SBF or equivalent rolls shallbe sanded smooth on both surfaces.3. To avoid incorrect results due to the cantilever effect, samples shall have anarea no larger than 4 in.2and the point of testing shall be no mor
49、e than12 in. offthe center of the samples.TABLE 3 Temper Designations and Hardness ValuesSingle-Reduced Tin Mill ProductsContinuously AnnealedNOTE 1Thinner plate (0.0083-in. ordered thickness and lighter) isnormally tested using the Rockwell 15T scale and the results converted tothe Rockwell 30T scale (see Annex A2 and Table A2.1).TemperDesignationRockwell Hardness ValuesAll Thicknesses HR30TACharacteristics and TypicalEnd UsesNominal RangeT-1 49 4553 soft for drawing parts such asnozzles, spouts, and oil filtershellsT-2 53 49
