1、Designation: A623 10Standard Specification forTin Mill Products, General Requirements1This standard is issued under the fixed designation A623; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in
2、parentheses indicates the year of last reapproval. Asuperscript epsilon () 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. Scope1.1 This specification covers a group of common require-ments which,
3、 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 sequence n
4、amed.NOTE 1Acomplete metric companion to SpecificationA623 has beendevelopedSpecification A623M; therefore no metric equivalents arepresented in this specification.1.3 The following safety caveat covers Annex A3 throughAnnex A10 of this specification: This standard does notpurport to address all of
5、the safety concerns, if any, associatedwith its use. It is the responsibility of the user of this standardto establish appropriate safety and health practices anddetermine the applicability of regulatory limitations prior touse.2. Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definit
6、ions for Mechanical Testingof Steel ProductsA700 Practices for Packaging, Marking, and Loading Meth-ods for Steel Products for ShipmentA987 Practice for Measuring Shape Characteristics of TinMill ProductsD1125 Test Methods for Electrical Conductivity and Resis-tivity of WaterE18 Test Methods for Roc
7、kwell Hardness of Metallic Ma-terialsE112 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:3Federal Std. No. 123 Marking for Shipment (C
8、ivil Agen-cies)3. 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 of 0.00011 is th
9、e 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 weightof a base box.3.1
10、.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 temperature, holding, and
11、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, na surface that ha
12、s 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.)3.1.7 burr, nmetal displaced beyond the plane of thes
13、urface by slitting or shearing (see 9.1.7 and 9.2.6).1This specification is under the jurisdiction 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, 2010. Published October 20
14、10. Originallyapproved in 1968. Last previous edition approved in 2009 as A623 - 09. DOI:10.1520/A0623-10.2For 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 standa
15、rds Document Summary page onthe ASTM website.3Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.1.8 cam
16、ber, 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 treatment, electrolytic tin plate, na passi-vating chemical treatm
17、ent 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 that has a passivating or chemical treatmentapplied to the su
18、rface 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 tandem.3.1.12 continuous annealinga process consisting of pass-in
19、g 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. Aninert or slightly reducing atmosphere is maintained in thef
20、urnace 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 annealing.3.1.15 electrolytic chromium-coated steellight-gage, l
21、ow-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.3.1.16.1 J Plateelectrolytic tin plate, No. 50 or heavier tincoat
22、ing, 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)(see Annex A5), Tin Crystal Size (TCS) (see Annex A4). Thealloy
23、 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 in the followingtable and as measured by the Special Property T
24、ests 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 LagA10 s maxIron Solution Value 20 g Iron maxTin Crystal Size
25、ASTM No. 9 or largerAlloy Tin CoupleB0.12 A/cm2maxAThe Pickle Lag test is not necessary if the product is processed using ananneal atmosphere gas of HNX or H2.BGood mill practice has demonstrated the ability to average 0.05 A/cm2or lessover an extended period of production.3.1.16.3 DiscussionThe pro
26、duction of J Plate and K Platerequire special processing 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
27、 specific shipment having thesame order specifications.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 doubl
28、e-reduced plate (see 8.2).3.1.21 oilinga lubricant 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).3.1.2
29、5 Rockwell hardness testa test for determining 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
30、 to minimize severe fluting and stretcher-strain 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 st
31、eel Type MRbase-metal steel, similar in metalloidcontent 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
32、Requirements for Tin Mill ProductsElementCast Composition, 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 0.05Alum
33、inumC0.20 0.10 0.20Other elements, each 0.02 0.02 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 % wh
34、en approved bythe purchaser.CTypes L and MR may 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 %.A623 102plate, the appearance is also influenced by the weight ofcoating and by melting or
35、 not melting the tin coating.3.1.32 surface finishessteel 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 produc
36、tswhich indicates the forming properties of the 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
37、weight of tin applied to thesteel surface, usually 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 designat
38、ion number, and the decimal point isomitted. 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 othe
39、r side.3.1.36 vapor vacuum depositionthe condensation 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-fu
40、rnace, or basic-oxygen process.5. Chemical Composition5.1 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 s
41、teelshall be made by the supplier to determine 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 necessarilya
42、nalyzed are dependent on the suppliers practices 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. M
43、echanical Requirements8.1 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 character
44、istics of thematerial. 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 Valu
45、esSingle-Reduced Tin 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 HR30T
46、ACharacteristicsand TypicalEnd 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, closur
47、es, andcrown capsT-4 (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 s
48、hallbe aged prior to 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 te
49、sting shall be no more 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
