1、Designation: A 424 06Standard Specification forSteel, Sheet, for Porcelain Enameling1This standard is issued under the fixed designation A 424; 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 (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 sheet steel in coils and cutlengths
3、for porcelain enameling. The compositions and pro-cessing of these steels are such that articles for porcelainenameling may be fabricated from them and, under properconditions, enameled. The steels are furnished as Type I, TypeII, and Type III. Type I and Type II are supplied in twodesignations, Com
4、mercial Steel and Drawing Steel. Type IIIsteel is interstitial-free and does not require a designation.2. Referenced Documents2.1 ASTM Standards:2A 568/A 568M Specification for Steel, Sheet, Carbon,Structural, and High-Strength, Low-Alloy, Hot-Rolled andCold-Rolled, General Requirements forA 941 Ter
5、minology Relating to Steel, Stainless Steel, Re-lated Alloys, and Ferroalloys3. Terminology3.1 DefinitionsFor definitions of other terms used in thisspecification, refer to Terminology A 941.3.2 Definitions of Terms Specific to This Standard:3.3 base coatalso known as ground coat. This coatinglayer
6、is applied directly to the steel and promotes adhesion ofthe coating system to the steel.3.4 cover coatThis coating layer is usually applied overthe base or ground coat to improve the appearance and providethe proper color.3.5 direct cover coatThis refers to a single coatingapplication that provides
7、 both adequate adhesion and appear-ance.4. Classification4.1 Types:4.1.1 Type I steel has an extremely low carbon levelachieved through sheet decarburization. This material is suit-able for direct cover coat enameling practice, but this require-ment must be indicated by the purchaser in accordance w
8、ith5.1.6. This material is also suitable for ground and cover coatenameling practice. It has good sag resistance and goodformability.4.1.2 Type II steel is suitable for applications where groundand cover coat enameling operations are employed. Thecomposition of the Type II steel is obtained in melti
9、ngoperations.4.1.3 Type III is an interstitial-free steel and is suitable forapplications where ground and cover coat enameling opera-tions are employed. The composition of the Type III steel isobtained in melting operations. It has good sag resistance andexcellent formability.4.2 Product Designatio
10、ns:4.2.1 Commercial Steel is intended for parts where bend-ing, moderate forming, or moderate drawing may be involved.4.2.2 Drawing Steel is intended for fabricating identifiedparts where the draw is particularly severe or where thematerial shall be essentially free of changes in mechanicalpropertie
11、s over a period of time. Drawing Steel should bespecified where the formed material shall be essentially free ofsuch surface disturbances as stretcher strains or fluting withoutthe need of prior roller leveling.4.2.3 Type III interstitial-free steel is intended for fabricat-ing identified parts wher
12、e the most severe drawing or formingis involved and where the material must be free of changes inmechanical properties over a period of time and free of suchsurface disturbances as stretcher strains or fluting without theneed of prior roller leveling.4.3 Porcelain Enamels:4.3.1 Ground coat enamels a
13、re glasses used primarily fortheir bonding characteristics. They may be applied after propermetal preparation (either pickle or pickle-free depending onenamel system). These glasses may be applied as either drypowders or wet slips. This type enamel is suitable for all threetypes of steel (Type I, II
14、, or III).4.3.2 Cover coat enamels are appearance glasses applied forspecific color, corrosion, alkali resistance, and so forth. Theseenamels may be applied directly to Type I steels after suitable1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Relate
15、d Alloys and is the direct responsibility of SubcommitteeA01.19 on Steel Sheet and Strip.Current edition approved March 1, 2006. Published March 2006. Originallyapproved in 1958. Last previous edition approved in 2000 as A 424 00.2For referenced ASTM standards, visit the ASTM website, www.astm.org,
16、orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700
17、, West Conshohocken, PA 19428-2959, United States.metal preparation. They may also be applied over fired groundcoat enamels. They may be applied as either dry powder or wetslip.4.3.3 Two coat-one fire enamels are special glass systemsapplied as dry powders. They usually are applied as pickle-freesys
18、tems. They are suitable for all three types of steel (Type I,II, or III). Both the base coat (adherence promoting enamel)and the cover coat (color or other specific properties) areapplied and fired at the same time.5. Ordering Information5.1 Orders for material under this specification shall include
19、the following information, as required, to describe adequatelythe desired material:5.1.1 Quantity,5.1.2 ASTM specification number and date of issue,5.1.3 Name of material (Porcelain Enameling Sheet, Type I,Drawing Steel),5.1.4 Condition (oiled unless otherwise specified),5.1.5 Finish (matte (dull) f
20、inish will be supplied unlessotherwise specified),5.1.6 Enameling practice (for Type I, indicate if direct covercoat practice will be used), and5.1.7 Dimensions (thickness, width, and length for cutlengths, or thickness and width of coils).5.1.7.1 As agreed upon between the purchaser and theproducer
21、, material ordered to this specification will be suppliedto meet the appropriate standard or restricted thickness toler-ance table shown in Specification A 568/A 568M.NOTE 1Not all producers are capable of meeting all of the limitationsof the thickness tolerance tables in Specification A 568/A 568M.
22、 Thepurchaser should contact the producer regarding possible limitations priorto placing an order.5.1.8 Coil size and weight requirements (must includeinside and outside diameters and maximum weight),5.1.9 Application (show part identification and description),5.1.10 Special requirements (if require
23、d), and5.1.11 Heat analysis (if required) (see 10.1).NOTE 2A typical ordering description is as follows: 40 000 lb,ASTM A 424 (latest issue) Porcelain Enameling Sheet, Type I, DrawingSteel, direct cover coat, 0.048 in. by 35 in. by 96 in., Part 2587, RangeTop.6. General Requirements for Delivery6.1
24、Material furnished under this specification shall con-form to the applicable requirements of the current edition ofSpecification A 568/A 568M.6.2 Products covered by this specification are produced todecimal thickness only and decimal thickness tolerances apply.7. Chemical Composition7.1 The heat an
25、alysis of Type I, Type II, and Type III shallconform to the requirements prescribed in Table 1 except forcarbon in Type I as noted.8. Mechanical Properties8.1 Bend TestCommercial Steel sheet shall be capable ofbeing bent at room temperature in any direction through 180flat on itself without cracking
26、 on the outside of the bentportion.8.2 FormabilityDrawing Steel and Type III sheet shallproduce an identified part within a properly established break-age allowance.9. Workmanship, Finish, and Appearance9.1 Surface FinishUnless otherwise specified, the sheetshall have a matte (dull) finish suitable
27、for porcelain enamel-ing.9.2 OilingUnless otherwise specified, the sheet shall beoiled.10. Certification10.1 When requested, the manufacturer shall furnish theresults of the heat analysis made to determine compliance withthis specification and shall include the purchase order number,ASTM designation
28、 number, and heat number correlating theresults with the material represented.11. Keywords11.1 commercial steel; decarburization; drawing steel;enameling; interstitial free steel; porcelainTABLE 1 Chemical CompositionAElementComposition, max, percentType I Type II Type IIICarbon 0.008B0.05 0.02Manga
29、nese 0.40 0.50 0.35Phosphorus 0.020 0.020 0.020Sulfur 0.030 0.030 0.030OtherCDAWhere aluminum is used as the deoxidizing agent, the aluminum content totalby product analysis is usually in excess of 0.010 %.BHeat analysis of carbon is not appropriate for Type I. Sheet product analysis isappropriate f
30、or checking proper type of material.CMicroalloy additions are permitted to meet special customer requirements.DColumbium or titanium additions, or both, are made to combine with carbonand nitrogen to produce an interstitial-free steel.A424062SUMMARY OF CHANGESCommittee A01 has identified the locatio
31、n of selected changes to this standard since the last issue, A 424 00,that may impact the use of this standard. (Approved March 1, 2006.)(1) Renamed and renumbered Section 3, Terminology, toSection 4, Classification.(2) Added new Section 3, Terminology.(3) Moved Section 6, General Requirements for D
32、elivery, toafter Ordering Information.(4) Renumbered old Sections 3 through 10 to 4 through 11.(5) Renamed 3.2, Quality Designations, to 4.2, Product Des-ignations.(6) Renamed Section 5, Chemical Requirements, to Section 7,Chemical Composition.(7) Renamed Section 6, Mechanical Requirements, to Secti
33、on8, Mechanical Properties.(8) Deleted last sentence in Footnote B of Table 1.(9) Added new Keywords.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that det
34、ermination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved o
35、r withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel th
36、at your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).A424063
