1、Designation: A623M 10Standard Specification forTin Mill Products, General Requirements Metric1This standard is issued under the fixed designation A623M; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A n
2、umber in 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.INTRODUCTIONThis specification is the metric counterpart of Specifi
3、cationA623. It is not intended to replaceA623.Users of the standard should note several very significant differences in how the product is producedand marketed.(1) The metric product does not carry the overrun associated with tin mill products produced tocustomary units. Metric tin mill products are
4、 produced to ordered size.(2) The metric product is designated in units of 100 m2called a SITA(System International TinplateArea), rather than in base boxes.(3) The metric product is designated by thickness in millimetres rather than by basis weight.(4) Coating weights are given in grams per square
5、metre, not pounds per base box.(5) Thickness tolerances are given in absolute figures instead of a 6 percentage.(6) Each package of metric tin mill products contains 100 sheets, not the 112 of customary unitpackages.All of the above significant differences, as well as others of lesser consequence, s
6、hould beconsidered when switching from Specification A623 to A623M.1. Scope1.1 This specification covers a group of common require-ments which, unless otherwise specified in the purchase orderor in an individual specification, shall apply to tin millproducts.1.2 In case of conflict in requirements,
7、the requirements ofthe purchase order, the individual material specification,andthis general specification shall prevail in the sequence named.1.3 The following safety hazards caveat covers Annex A1throughAnnexA8 of this specification: This standard does notpurport to address all of the safety conce
8、rns, 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.NOTE 1A complete inch-pound companion to Specification A623Mhas been developedA623; ther
9、efore, no inch-pound equivalents arepresented.2. Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA700 Practices for Packaging, Marking, and Loading Meth-ods for Steel Products for ShipmentA987 Practice for Measuring Shape Characteristi
10、cs of TinMill ProductsE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE112 Test Methods for Determining Average Grain Size2.2 Military Standards:3MIL-STD-129 Marking for Shipment and Storage1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and
11、Related Alloys and is the direct responsibility of SubcommitteeA01.20 on Tin Mill Products.Current edition approved Oct. 1, 2010. Published October 2010. Originallyapproved in 1978. Last previous edition approved in 2009 as A623M 09. DOI:10.1520/A0623M-10.2For referenced ASTM standards, visit the AS
12、TM 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 Section D, 700Robbins Ave., Philadelphia, P
13、A 19111-5094, Attn: NPODS.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.MIL-STD-163 Steel Mill Products, Preparation for Markingand Storage2.3 Federal Standard:3Fed. Std. No. 123 Marking for Shipment (Civil Agencies)3. Terminology3
14、.1 Definitions:3.1.1 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.3.1.2 box annealing, na process involving slow heating ofcoils to a subcritical temperat
15、ure, holding, and cooling there-from, to recrystallize the grain, and thus, relieve stressesproduced during cold reduction. It is accomplished in a sealedcontainer. By introducing and maintaining an inert or slightlyreducing atmosphere during the cycle, a relatively brightsurface is obtained.3.1.3 b
16、right finish, na surface that has a lustrous appear-ance.3.1.4 burr, nmetal displaced beyond the plane of thesurface by slitting or shearing (see 9.1.6 and 9.2.6).3.1.5 camber, nthe greatest deviation of a coil edge froma straight line. The measurement is taken on the concave sideand is the perpendi
17、cular distance from a straight line to thepoint of maximum deviation (see 9.1.8 and 9.2.7).3.1.6 chemical treatment, electrolytic tin plate, na passi-vating chemical treatment applied to the surface of electrolytictin plate to stabilize the plate surface characteristics compatiblewith a specified en
18、d use (see Annex A7).3.1.7 chemically treated steel, nlight-gage, low-carbon,cold-reduced steel that has a passivating or chemical treatmentapplied to the surface to provide rust resistance or retardunderfilm corrosion, or both.3.1.8 cold reduction, nthe process of reducing the thick-ness of the str
19、ip cold, generally accomplished by one rollingthrough a series of four-high mills arranged in tandem.3.1.9 continuous annealing, na process consisting ofpassing the cold-reduced strip continuously and in a singlethickness through a series of vertical passes within a furnaceconsisting of heating, soa
20、king, and cooling zones to recrystal-lize the grain and thus relieve stresses produced during coldreduction. An inert or slightly reducing atmosphere is main-tained in the furnace to obtain a relatively bright strip.3.1.10 differentially coated tin plate, nelectrolytic tinplate with a different weig
21、ht of tin coating on each surface.3.1.11 double-reduced plate, nplate given a second majorcold reduction following annealing.3.1.12 electrolytic chromium-coated steel, nlight-gage,low-carbon, cold-reduced steel on which chromium and chro-mium oxides have been electrodeposited.3.1.13 electrolytic tin
22、 plate, nlight-gage, low-carbon,cold-reduced steel on which tin has been electrodeposited byan acid or alkaline process.3.1.13.1 J Plate, nelectrolytic tin plate, 5.6/2.8 g/m2orheavier tin coating, with improved corrosion performance forsome galvanic detinning food products as specified in 3.1.13.2a
23、nd as measured by the Special Property Tests for Pickle Lag(PL) (see Annex A2), Iron Solution Values (ISV) (see AnnexA4), Tin Crystal Size (TCS) (seeAnnexA3). The alloy layer isnormally light in color, characteristic of the acid tinningprocess.3.1.13.2 K Plate, nelectrolytic tin plate, 5.6/2.8 g/m2o
24、rheavier tin coating, with improved corrosion performance forsome galvanic detinning food products as specified in thefollowing table and as measured by the Special Property Testsfor Pickle Lag (PL) (seeAnnexA2), Iron Solution Value (ISV)(seeAnnexA4), Tin Crystal Size (TCS) (seeAnnexA3),AlloyTin Cou
25、ple (ATC) (see Annex A5) and Aerated Media Polar-ization Test (AMP) (see Annex A8).Special Properties AimsPickle LagA10 s maxIron Solution Value 20 g iron maxTin Crystal Size ASTM No. 9 or largerAlloy Tin CoupleB0.12 A/cm2maxAThe Pickle Lag test is not necessary if the product is processed using ana
26、nneal 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.3.1.13.3 DiscussionThe production of J Plate and K Platerequire special processing and testing. In order to receive JPlate or K Plate, this requirement
27、 must be specified on theorder.3.1.14 length dimension, nthe longer dimension of a cutsize (see 9.2.5).3.1.15 lot, neach 20 000 sheets or part thereof or theequivalent in coils, of an item in a specific shipment having thesame order specifications.3.1.16 matte finish, na surface that has an unmelted
28、 tincoating, generally on a shot-blast finish (SBF) base steel.3.1.17 mechanical designation, nan arbitrary number todesignate Rockwell hardness and ultimate tensile strengthcharacteristics for double-reduced plate (see 8.2).3.1.18 oiling, na lubricant film applied to both surfaces ofthe plate.3.1.1
29、9 package, na quantity of 100 sheets.3.1.20 passivating treatment, na surface chemical treat-ment (see 3.1.6).3.1.21 Rockwell hardness test, na test for determininghardness (see Annex A1).3.1.22 rolling width, nthe dimension of the sheet perpen-dicular to the rolling direction.3.1.23 single-reduced
30、plate, nplate produced with onemajor cold reduction.3.1.24 SITA, n100 square metres.Formula for cut lengths:SITA 5width mm!10003length mm!10003 number of packages (1)Formula for coils:SITA 5width mm!10003 length m!100m2(2)3.1.25 steel Type D, nbase-metal steel aluminum killed,sometimes required to m
31、inimize severe fluting and stretcher-strain hazards or for severe drawing applications (see Table 1).A623M 1023.1.26 steel Type L, nbase-metal steel, low in metalloidsand residual elements, sometimes used for improved internalcorrosion resistance for certain food-product containers (seeTable 1).3.1.
32、27 steel Type MR, nbase-metal steel, similar in met-alloid content to Type L but less restrictive in residualelements, commonly used for most tin mill products (see Table1).3.1.28 surface appearance, nvisual characteristics deter-mined primarily by the steel surface finish. For electrolytic tinplate
33、, the appearance is also influenced by the weight ofcoating and by melting or not melting the tin coating.3.1.29 surface finishes, nsteel surface finishes for tin millproducts imparted by the finishing-mill work rolls. These maybe either ground, blasted, or etched roll finishes.3.1.30 temper designa
34、tion, nan arbitrary number to des-ignate a Rockwell hardness range for single-reduced productswhich indicates the forming properties of the plate (see Section8 and Table 2 and Table 3).3.1.31 temper mill, na mill for rolling base metal steelafter annealing to obtain proper temper, flatness, and surf
35、acefinish. It may consist of one stand or two stands arranged intandem.3.1.32 tin coating weight, nthe weight of tin applied to thesteel surface, usually stated as grams per square metre distrib-uted evenly over both surfaces. The coating is usually referredto by designation numbers, referring separ
36、ately to the nominaltin weight on each surface, but omitting the units. Thus, 2.8/2.8designates tin plate with a coating of 2.8 g/m2on each of thetwo surfaces. For differential coatings the same system isapplied. Thus, 1.1/2.2 has a coating of 1.1 g/m2on one surfaceand 2.2 g/m2on the other surface.3
37、.1.33 width dimension, nthe shorter dimension of a cutsize (see 9.2.5).4. Base Metal4.1 The steel shall be made by the open-hearth, electricfurnace, or basic-oxygen process.5. Chemical Composition5.1 The steel shall conform to the chemical compositionrequirements as prescribed in Table 1 except as o
38、therwiseagreed 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 determine the percentage ofcarbon, manganese, phosphorus, sulfur, silicon, and residualelements shown in Table 1. Other e
39、lements, unless agreed uponbetween the manufacturer and the purchaser, individually shallnot exceed 0.02 %, maximum and while not necessarilyanalyzed are dependent on the suppliers practices and con-trols.7. Product Analysis7.1 Rimmed or capped steels are characterized by a lack ofuniformity in thei
40、r chemical composition, and for this reason,product analysis is not technologically appropriate unlessmisapplication is clearly indicated.8. Mechanical Requirements8.1 Single-Reduced Tin Mill Products, TemperThe termtemper when applied to single-reduced tin mill productssummarizes a combination of i
41、nterrelated mechanical proper-ties. No single mechanical test can measure all the variousfactors that contribute to the fabrication characteristics of thematerial. The Rockwell 30T hardness value is a quick testwhich serves as a guide to the properties of the plate. This testTABLE 1 Chemical Require
42、ments for Tin Mill ProductsCast Composition, max %Element Type D Type L Type MRCarbon 0.12 0.13 0.13Manganese 0.60 0.60 0.60Phosphorous 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 0.05AluminumC
43、0.20 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 % when ap
44、proved 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 %.TABLE 2 Temper Designations and Hardness Values SingleReduces Tin Mill ProductsBox AnnealedNOTE
45、 1Thinner plate (0.21 mm ordered thickness and thinner) isnormally tested using the Rockwell 15T scale and the results converted tothe Rockwell 30T scale (see Annex A1 and Table A1.1).Temper Designation Rockwell Hardness ValuesAll Thickness HR30TACharacteristics andTypical End UsesNominal RangeT-1 (
46、T49) 49 45-53 soft for drawing partssuch as nozzles,spouts, and oil filtershellsT-2 (T53) 53 49-57 moderately soft fordrawing shallow partssuch as rings, plugs,and pie pansT-3 (T57) 57 53-61 Fairly stiff for partssuch as can ends andbodies, closures, andcrown capsT-4 (T61) 61 57-65 Increased stiffne
47、ss forcan ends and bodies,crown caps, and largeclosuresAThese ranges are based on the use of the diamond spot anvil and a 1.588 mmhardened steel ball indenter.Test Conditions:1. For referee purposes, samples of black plate, unreflowed ETP, and ECCS shallbe aged prior to testing by holding at 200C fo
48、r 10 minutes.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 longer than 2500 mm2and the point of testing shall be no more than 13mm off the cen
49、ter of the samples.A623M 103forms the basis for a system of temper designations as shownin Table 2 and Table 3. A given temper shall have hardnessvalues meeting the limits shown. The mechanical properties ofcontinuously annealed plate and batch annealed plate of thesame Rockwell 30T temper designation are not identical. It isimportant to keep in mind, that the Rockwell 30T test does notmeasure all the various factors which contribute to the fabri-cation characteristics of the plate.8.2 Double-Reduced Tin Mill Products, Mechanical
