1、Designation: A623M 11A623M 16Standard 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 revis
2、ion. A number 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 U.S. Department of Defense.INTRODUCTIONThis specification is the metric counterpa
3、rt of Specification A623. It is not intended to replace A623.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 mi
4、ll products are produced to ordered size.(1) The metric product does not carry the overrun associated with tin mill products produced to customary units. Metric tin millproducts are produced to ordered size.(2) The metric product is designated in units of 100 m2 called a SITA(System International Ti
5、nplateArea), rather than in baseboxes.(3) The metric product is designated by thickness in millimetres rather than by basis weight.(4) Coating weights are given in grams per square metre, not pounds per base box.(5) Thickness tolerances are given in absolute figures instead of a 6 percentage.(6) Eac
6、h package of metric tin mill products contains 100 sheets, not the 112 of customary unit packages.(2) The metric product is designated in units of 100 m2 called a SITA (System International Tinplate Area), rather than in baseboxes.(3) The metric product is designated by thickness in millimetres rath
7、er than by basis weight.(4) Coating weights are given in grams per square 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 unit packages.All of th
8、e above significant differences, as well as others of lesser consequence, should be considered when switching fromSpecification A623 to A623M.1. Scope1.1 This specification covers a group of common requirements, which unless otherwise specified in the purchase order or in anindividual specification,
9、 shall apply to tin mill products.1.2 In case of conflict in requirements, the requirements of the purchase order, the individual material specification, and thisgeneral specification shall prevail in the sequence named.1.3 The following safety hazards caveat covers Annex A1 through Annex A8 of this
10、 specification: This standard does notpurport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard toestablish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.NOTE
11、1A complete inch-pound companion to Specification A623M has been developedA623; therefore, no inch-pound equivalents are presented.2. Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for Mechanical Testing of Steel Products1 This specification is under the jurisdiction ofAST
12、M Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.20on Tin Mill Products.Current edition approved Oct. 1, 2011Dec. 1, 2016. Published October 2011December 2016. Originally approved in 1978. Last previous edition approved in 20102011as A6
13、23M 10.A623M 11. DOI: 10.1520/A0623M-11.10.1520/A0623M-16.2 For referencedASTM standards, 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.Thi
14、s 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 version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editio
15、ns as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1A700 Guide for Packaging, Marking, and Loading Meth
16、ods for Steel Products for ShipmentA987 Practice for Measuring Shape Characteristics of Tin Mill ProductsE18 Test Methods for Rockwell Hardness of Metallic MaterialsE112 Test Methods for Determining Average Grain Size2.2 Military Standards:3MIL-STD-129 Marking for Shipment and StorageMIL-STD-163 Ste
17、el Mill Products, Preparation for Marking and Storage2.3 Federal Standard:3Fed. Std. No. 123 Marking for Shipment (Civil Agencies)3. Terminology3.1 Definitions:3.1.1 black plate, nlight-gage, low-carbon, cold-reduced steel intended for use in the untinned state or for the production ofother tin mill
18、 products. It is supplied only in a dry or oiled condition.3.1.2 box annealing, na process involving slow heating of coils to a subcritical temperature, holding, and cooling therefrom,to recrystallize the grain, and thus, relieve stresses produced during cold reduction. It is accomplished in a seale
19、d container. Byintroducing and maintaining an inert or slightly reducing atmosphere during the cycle, a relatively bright surface is obtained.3.1.3 bright finish, na surface that has a lustrous appearance.3.1.4 burr, nmetal displaced beyond the plane of the surface by slitting or shearing (see 9.1.7
20、 and 9.2.6).3.1.5 camber, nthe greatest deviation of a coil edge from a straight line. The measurement is taken on the concave side andis the perpendicular distance from a straight line to the point of maximum deviation (see 9.1.9 and 9.2.7).3.1.6 chemical treatment, electrolytic tin plate, na passi
21、vating chemical treatment applied to the surface of electrolytic tinplate to stabilize the plate surface characteristics compatible with a specified end use (see Annex A7).3.1.7 chemically treated steel, nlight-gage, low-carbon, cold-reduced steel that has a passivating or chemical treatmentapplied
22、to the surface to provide rust resistance or retard underfilm corrosion, or both.3.1.8 cold reduction, nthe process of reducing the thickness of the strip cold, generally accomplished by one rolling througha series of four-high mills arranged in tandem.3.1.9 continuous annealing, na process consisti
23、ng of passing the cold-reduced strip continuously and in a single thicknessthrough a series of vertical passes within a furnace consisting of heating, soaking, and cooling zones to recrystallize the grain andthus relieve stresses produced during cold reduction.An inert or slightly reducing atmospher
24、e is maintained in the furnace to obtaina relatively bright strip.3.1.10 differentially coated tin plate, nelectrolytic tin plate with a different weight of tin coating on each surface.3.1.11 double-reduced plate, nplate given a second major cold reduction following annealing. Some double-reduced pr
25、oductsare produced to achieve a minimum level of ductility (% elongation) in the material. These products carry the designation of HighElongation Double-Reduced, or HEDR.3.1.12 electrolytic chromium-coated steel, nlight-gage, low-carbon, cold-reduced steel on which chromium and chromiumoxides have b
26、een electrodeposited.3.1.13 electrolytic tin plate, nlight-gage, low-carbon, cold-reduced steel on which tin has been electrodeposited by an acid oralkaline process.3.1.13.1 J Plate, nelectrolytic tin plate, 5.6/2.8 g/m2 or heavier tin coating, with improved corrosion performance for somegalvanic de
27、tinning food products as specified in 3.1.13.2 and as measured by the Special Property Tests for Pickle Lag (PL) (seeAnnex A2), Iron Solution Values (ISV) (see Annex A4), Tin Crystal Size (TCS) (see Annex A3). The alloy layer is normally lightin color, characteristic of the acid tinning process.3.1.
28、13.2 K Plate, nelectrolytic tin plate, 5.6/2.8 g/m2 or heavier tin coating, with improved corrosion performance for somegalvanic detinning food products as specified in the following table and as measured by the Special Property Tests for Pickle Lag(PL) (see AnnexA2), Iron Solution Value (ISV) (see
29、AnnexA4), Tin Crystal Size (TCS) (see AnnexA3),Alloy Tin Couple (ATC)(see Annex A5) and Aerated Media Polarization Test (AMP) (see Annex A8).Special Properties AimsPickle LagA 10 s maxIron Solution Value 20 g iron maxTin Crystal Size ASTM No. 9 or largerAlloy Tin CoupleB 0.12 A/cm2 max3 Available fr
30、om Standardization Documents Order Desk, Bldg. 4 Section D, 700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.A623M 162A The Pickle Lag test is not necessary if the product is processed using an anneal atmosphere gas of HNX or H2.B Good mill practice has demonstrated the ability to average
31、0.05 A/cm 2 or less over an extended period of production.3.1.13.3 DiscussionThe production of J Plate and K Plate require special processing and testing. In order to receive J Plateor K Plate, this requirement must be specified on the order.3.1.14 length dimension, nthe longer dimension of a cut si
32、ze (see 9.2.9).3.1.15 lot, neach 20 000 sheets or part thereof or the equivalent in coils, of an item in a specific shipment having the sameorder specifications.3.1.16 matte finish, na surface that has an unmelted tin coating, generally on a shot-blast finish (SBF) base steel.3.1.17 mechanical desig
33、nation, nan arbitrary number to designate Rockwell hardness and ultimate tensile strengthcharacteristics for double-reduced plate (see 8.2).3.1.18 oiling, na lubricant film applied to both surfaces of the plate.3.1.19 package, na quantity of 100 sheets.3.1.20 passivating treatment, na surface chemic
34、al treatment (see 3.1.6).3.1.21 Rockwell hardness test, na test for determining hardness (see Annex A1).3.1.22 rolling width, nthe dimension of the sheet perpendicular to the rolling direction.3.1.23 single-reduced plate, nplate produced with one major cold reduction.3.1.24 SITA, n100 square metres.
35、Formula for cut lengths:SITA5 width mm!1000 3length mm!1000 3number of packagesFormula for coils:SITA5width mm!1000 3length m!100m23.1.25 steel Type D, nbase-metal steel aluminum killed, sometimes required to minimize severe fluting and stretcher-strainhazards or for severe drawing applications (see
36、 Table 1).3.1.26 steel Type L, nbase-metal steel, low in metalloids and residual elements, sometimes used for improved internalcorrosion resistance for certain food-product containers (see Table 1).3.1.27 steel Type MR, nbase-metal steel, similar in metalloid content to Type L but less restrictive i
37、n residual elements,commonly used for most tin mill products (see Table 1).3.1.28 surface appearance, nvisual characteristics determined primarily by the steel surface finish. For electrolytic tin plate,the appearance is also influenced by the weight of coating and by melting or not melting the tin
38、coating.3.1.29 surface finishes, nsteel surface finishes for tin mill products imparted by the finishing-mill work rolls. These may beeither ground, blasted, or etched roll finishes.TABLE 1 Chemical Requirements for Tin Mill ProductsCast Composition, max %Element Type D Type L Type MRCarbon 0.12 0.1
39、3 0.13Manganese 0.60 0.60 0.60Phosphorous 0.020 0.015 0.020Sulfur 0.03 0.03 0.03SiliconA,B 0.020 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 0.20 0.10 0.20Other elements, each 0.02 0.02 0.02AWhen steel produced by the silicon killed
40、method is ordered, the silicon maximummay 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 Land MR may be supplied as non-killed or killed, which would r
41、espectivelybe produced without and with aluminum additions. Minimum aluminum level forType D is usually 0.02 %.A623M 1633.1.30 temper designation, nan arbitrary number to designate a Rockwell hardness range for single-reduced products, whichindicates the forming properties of the plate (see Section
42、8 and Table 2 and Table 3).3.1.31 temper mill, na mill for rolling base metal steel after annealing to obtain proper temper, flatness, and surface finish.It may consist of one stand or two stands arranged in tandem.3.1.32 tin coating weight, nthe weight of tin applied to the steel surface, usually s
43、tated as grams per square metre distributedevenly over both surfaces. The coating is usually referred to by designation numbers, referring separately to the nominal tin weighton each surface, but omitting the units. Thus, 2.8/2.8 designates tin plate with a coating of 2.8 g/m2 on each of the two sur
44、faces.For differential coatings the same system is applied. Thus, 1.1/2.2 has a coating of 1.1 g/m2 on one surface and 2.2 g/m2 on theother surface.3.1.33 width dimension, nthe shorter dimension of a cut size (see 9.2.9).4. Base Metal4.1 The steel shall be made by the open-hearth, electric furnace,
45、or basic-oxygen process.5. Chemical Composition5.1 The steel shall conform to the chemical composition requirements as prescribed in Table 1 except as otherwise agreed uponbetween the manufacturer and the purchaser.6. Cast or Heat Analysis6.1 For Type D, MR, and Lan analysis of each heat of steel sh
46、all be made by the supplier to determine the percentage of carbon,manganese, phosphorus, sulfur, silicon, and residual elements shown in Table 1. Other elements, unless agreed upon between themanufacturer and the purchaser, individually shall not exceed 0.02 %, maximum and while not necessarily anal
47、yzed are dependenton the suppliers practices and controls.7. Product Analysis7.1 Rimmed or capped steels are characterized by a lack of uniformity in their chemical composition, and for this reason,product analysis is not technologically appropriate unless misapplication is clearly indicated.TABLE 2
48、 Temper Designations and Hardness Values SingleReduces Tin Mill ProductsBox AnnealedNOTE 1Thinner plate (0.21 mm ordered thickness and thinner) isnormally tested using the Rockwell 15TS scale and the results convertedto the Rockwell 30TS scale (see Annex A1 and Table A1.1).Temper Designation Rockwel
49、l Hardness ValuesAll Thickness HR30TSACharacteristics andTypical End UsesNominal RangeNominal RangB eT-1 (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 stiffness forcan ends and bodies,crown caps, and largeclosuresAThese ranges are based on the use of the diamond spot anvil and a 1.588
