1、Designation: A 424/A 424M 09Standard Specification forSteel, Sheet, for Porcelain Enameling1This standard is issued under the fixed designationA 424/A 424M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last revision.
2、 A number in parentheses indicates the year of last reapproval.A superscript 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. Scope*1.1 This specification covers sheet steel in coils and
3、 cutlengths 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 twodesig
4、nations, Commercial Steel and Drawing Steel. Type IIIsteel is interstitial-free and does not require a designation.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsyste
5、m shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.1.3 Tolerances are found in General Requirements Specifi-cations A 568/A 568M and A 635/A 635M. The appropriateGeneral Requirements specification is applied based on thethi
6、ckness and width of the product ordered.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 635/A 635M Specification for Steel, Sheet and Strip,Heavy-Thickness Co
7、ils, Hot-Rolled, Alloy, Carbon, Struc-tural, High-Strength Low-Alloy, and High-Strength Low-Alloy with Improved Formability, General RequirementsforA 941 Terminology Relating to Steel, Stainless Steel, Re-lated Alloys, and Ferroalloys3. Terminology3.1 DefinitionsFor definitions of other terms used i
8、n 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 is applied directly to the steel and promotes adhesion ofthe coating system to the steel.3.4 cover coatThis coating layer is usually applied ov
9、erthe base or ground coat to improve the appearance and providethe proper color.3.5 direct cover coatThis refers to a single coatingapplication that provides both adequate adhesion and appear-ance.4. Classification4.1 Types:4.1.1 Type I steel has an extremely low carbon levelachieved through sheet d
10、ecarburization. This material is suit-able for direct cover coat enameling practice, but this require-ment must be indicated by the purchaser in accordance with5.1.6. This material is also suitable for ground and cover coatenameling practice. It has good sag resistance and goodformability.4.1.2 Type
11、 II steel is suitable for applications where groundand cover coat enameling operations are employed. Thecomposition of the Type II steel is obtained in meltingoperations.4.1.3 Type III is an interstitial-free steel and is suitable forapplications where ground and cover coat enameling opera-tions are
12、 employed. The composition of the Type III steel isobtained in melting operations. It has good sag resistance andexcellent formability.4.2 Product Designations: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 in
13、tended for fabricating identifiedparts where the draw is particularly severe or where thematerial shall be essentially free of changes in mechanicalproperties over a period of time. Drawing Steel should bespecified where the formed material shall be essentially free of1This specification is under th
14、e jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.19 on Steel Sheet and Strip.Current edition approved April 1, 2009. Published April 2009. Originallyapproved in 1958. Last previous edition approved in 2006 as A 424 0
15、6.2For 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 standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this s
16、tandard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.such 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
17、parts where 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
18、 enamels are 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 (
19、Type I, II, 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 suitablemetal preparation. They may also be applied over fired groundcoat enamels. They may be applie
20、d 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-freesystems. 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 (co
21、lor or other specific properties) areapplied and fired at the same time.5. Ordering Information5.1 Orders for material under this specification shall includethe following information, as required, to describe adequatelythe desired material:5.1.1 Quantity,5.1.2 ASTM specification number and date of i
22、ssue,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) finish will be supplied unlessotherwise specified),5.1.6 Enameling practice (for Type I, indicate if direct covercoat practice will be used), an
23、d5.1.7 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, material ordered to this specification will be suppliedto meet the appropriate standard or restricted thickness toler-ance table shown in Spe
24、cification 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. Thepurchaser should contact the producer regarding possible limitations priorto placing an order.5.1.8 Coil size and weight requirements (must
25、 includeinside and outside diameters and maximum weight),5.1.9 Application (show part identification and description),5.1.10 Special requirements (if required), and5.1.11 Heat analysis (if required) (see 10.1).NOTE 2A typical ordering description is as follows: “40 000 lb,ASTM A 424-NN Porcelain Ena
26、meling Sheet, Type I, Drawing Steel,direct cover coat, 0.048 in. by 35 in. by 96 in., Part 2587, Range Top,” or,“50 000 kg, ASTM A 424M-NN Porcelain Enameling Sheet, Type I,Drawing Steel, direct cover coat, 1.22 mm by 890 mm by 2440 mm, Part2587, Range Top.”6. General Requirements for Delivery6.1 Ma
27、terial 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 onlyto either decimal thickness where decimal thickness tolerancesapply or to metric thickness where met
28、ric thickness tolerancesapply.7. Chemical Composition7.1 The heat analysis 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 tem
29、perature in any direction through 180flat on itself without cracking 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 othe
30、rwise specified, the sheetshall have a matte (dull) finish suitable 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 specif
31、ication and shall include the purchase order number,ASTM designation 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 CompositionAElementComposi
32、tion, max, percentType I Type II Type IIICarbon 0.008B0.05 0.02Manganese 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 i
33、s not appropriate for Type I. Sheet product analysis isappropriate for 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 ste
34、el.A 424/A 424M 092SUMMARY OF CHANGESCommitteeA01 has identified the location of selected changes to this standard since the last issue (A 424 06)that may impact the use of this standard. (Approved April 1, 2009.)(1) Sections 1.2 and 1.3 added to make this a dual standard.(2) Note 2metric ordering e
35、xample added.(3) Section 6.2 modified to allow for metric thickness ordering(4) Standards designation changed to recognize dualstandard.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this stan
36、dard are expressly advised that determination 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 and
37、if not revised, either reapproved or 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, w
38、hich you may attend. If you feel that 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).A 424/A 424M 093
