A424A424M-09a Standard Specification for Steel, Sheet, For Porcelain Enameling

Designation: A424/A424M − 09a

Standard Specification for

Steel, Sheet, for Porcelain Enameling 1 This standard is issued under the fixed designation A424/A424M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. 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. Sco Scope* pe*

3. Terminology

1.1 Thi Thiss spe specific cificatio ation n cov covers ers sheet stee steell in coil coilss and cut lengths for porcelain enameling. The compositions and processi ces sing ng of th thes esee st steel eelss ar aree su such ch th that at ar artic ticles les fo forr po porc rcela elain in enameli ena meling ng may be fab fabric ricated ated from the them m and and,, und under er pro proper per conditions, enameled. The steels are furnished as Type I, Type II,, an II and d Typ ypee II III. I. Type Type I an and d Typ ypee II ar aree su supp pplie lied d in tw two o designations, Commercial Steel and Drawing Steel. Type III steel is interstitial-free and does not require a designation.

3.1   Definitions— For For definitions of other terms used in this specification, refer to Terminology A941 Terminology  A941.. 3.2  Definitions of Terms Specific to This Standard: 3.2.1   base coat— also also known as ground coat. This coating layer is applied directly to the steel and promotes adhesion of  the coating system to the steel. 3.2.2   cover coat— This This coating layer is usually applied over the base or ground coat to improve the appearance and provide the proper color.

1.2 The values stated in either SI units or inch-pound inch-pound units are to be regarded separately as standard. The values stated in each system may not be exa exact ct equ equiva ivalent lents; s; the theref refore ore,, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

direct cov cover er coa coat—  t— This 3.2.3   direct T his re refe fers rs to a si sing ngle le co coati ating ng application that provides both adequate adhesion and appearance.

4. Class Classifica ification tion

1.3 Toleran olerances ces are found in General Requirements Specifications A568/A568M cations  A568/A568M and  and A635/A635M  A635/A635M.. The appropriate General Requirements specification is applied based on the thickness and width of the product ordered.

4.1   Types: 4.1.1   Typ steell ha hass an ex extr trem emely ely lo low w car carbo bon n lev level el Typee I   stee achieved through sheet decarburization. This material is suitable for direct cover coat enameling practice, but this requirement must be indicated by the purchaser in accordance with 5.1.6..  This material is also suitable for ground and cover coat 5.1.6 enam en ameli eling ng pr pract actice ice.. It ha hass go good od sag re resi sista stanc ncee an and d go good od formability. 4.1.2   Type II  steel  steel is suitable for applications where ground and an d co cove verr co coat at en enam ameli eling ng op oper erati ation onss ar aree emp emplo loye yed. d. Th Thee comp co mpos ositi ition on of th thee Typ ypee II ste steel el is ob obtai taine ned d in me melti lting ng operations. 4.1.3   Type III  is   is an interstitial-free steel and is suitable for applications applic ations where grou ground nd and cover coat enameling operations are employed. The composition of the Type III steel is obtained in melting operations. It has good sag resistance and excellent formability.

2. Referenc Referenced ed Documents Documents 2.1   ASTM Standards:2 A568/A568M Specification A568/A568M  Specification for Steel, Sheet, Carbon, Structural, tur al, and Hig High-S h-Stre trengt ngth, h, Low Low-Al -Alloy loy,, Hot Hot-Ro -Rolled lled and Cold-Rolled, Cold-R olled, Gener General al Requir Requirements ements for A635/A635M Sp Spec ecifi ifica catio tion n fo forr St Stee eel, l, Sh Shee eett an and d St Stri rip, p, Heavy-Thickness Coils, Hot-Rolled, Alloy, Carbon, Structural, High-Strength Low-Alloy, and High-Strength LowAlloy with Impro Improved ved Formab Formability ility,, Genera Generall Requir Requirements ements for A941 Terminology A941  Terminology Relating to Steel, Stainless Steel, Related Alloys,, and Ferro Alloys Ferroalloys alloys

4.2   Product Designations: 4.2.1   Commercial Steel is intended for parts where bending, moderate forming, or moderate drawing may be involved. 4.2.2   Drawing fabricating cating identified Drawing Steel   is intended for fabri part pa rtss wh wher eree th thee dr draw aw is pa part rticu icula larl rly y se seve vere re or wh wher eree th thee materia mate riall sha shall ll be ess essent entiall ially y fre freee of cha change ngess in mec mechan hanical ical proper pro perties ties over a per period iod of time time.. Dra Drawin wing g Ste Steel el sho should uld be specified where the formed material shall be essentially free of 

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This specification is under the jurisdiction of ASTM Committee  A01  A01 on  on Steel, Stainless Steel and Related Alloysand is the direct responsibility of Subcommittee A01.19 on A01.19  on Steel Sheet and Strip. Current edition approved Nov. 1, 2009. Published December 2009. Originally approved approv ed in 1958. Last previous edition approved approved in 2009 as A424 – 09. DOI: 10.1520/A0424_A0424M-09a. 2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [email protected]. For  Annual Book of ASTM  Standards volume information, refer to the standard’s Document Summary page on the ASTM website.

*A Summary of Changes section appears at the end of this standard Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States

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A424/A424M − 09a such surface disturbances as stretcher strains or fluting without the need of prior roller leveling. 4.2.3   Type III  interstitial-free steel is intended for fabricating identified parts where the most severe drawing or forming is involved and where the material must be free of changes in mechanical properties over a period of time and free of such surface disturbances as stretcher strains or fluting without the need of prior roller leveling.

cover coat, 0.048 in. by 35 in. by 96 in., Part 2587, Range Top, or, 50 000 kg, ASTM A424M – -NN Porcelain Enameling Sheet, Type I, Drawing Steel, direct cover coat, 1.22 mm by 890 mm by 2440 mm, Part 2587, Range Top.”

6. General Requirements Requirements for Delivery Delivery 6.1 Mat Materia eriall fur furnis nished hed und under er thi thiss spe specifi cificati cation on sha shall ll con con-form to the applicable requirements of the current edition of  Specification A568/A568M Specification  A568/A568M..

4.3   Porcelain Enamels: 4.3.1 4.3 .1 Gro Ground und coat ena enamels mels are glas glasses ses use used d pri primar marily ily for their bonding characteristics. They may be applied after proper metal preparation (either pickle or picklepickle-free free depending on enamel system). These glasses may be applied as either dry powders or wet slips. This type enamel is suitable for all three types of steel (Type I, II, or III). 4.3.2 Cover coat enamels are appearance appearance glasses applied applied for specific color, corrosion, alkali resistance, and so forth. These enamels may be applied directly to Type I steels after suitable metal preparation. They may also be applied over fired ground coat enamels. They may be applied as either dry powder or wet slip. 4.3.3 Two coat-one fire enamels are special glass systems applied as dry powders. They usually are applied as pickle-free systems. They are suitable for all three types of steel (Type I, II, or III). Both the base coat (adherence promoting enamel) and the cov cover er coa coatt (co (color lor or oth other er spe specifi cificc pro proper perties ties)) are applied and fired at the same time.

6.2 Products covered by this specification are produced only only to either decimal thickness where decimal thickness tolerances apply or to metric thickn thickness ess where metric thickness thickness toleran tolerances ces apply. 7. Chem Chemical ical Compositio Composition n 7.1 The heat analysis of Type Type I, Type II, and Type III shall conform to the requirements prescribed in  Table 1 except 1  except for carbon in Type I as noted. 8. Mechanical Propertie Propertiess 8.1   Bend Test— Commercial Commercial Steel sheet shall be capable of  being bent at room temperature in any direction through 180° flatt on its fla itsel elff wi with thou outt cr crac acki king ng on th thee ou outs tsid idee of th thee be bent nt portion. 8.2   Formability— Drawin Drawing g Stee Steell and Type Type III she sheet et sha shall ll produce an identi produce identified fied part within a prope properly rly established breakage allowa allowance. nce.

5. Orde Ordering ring Information Information

9. Wor Workmanship, kmanship, Finish, and Appearance Appearance

5.1 Order Orderss for material under this specification specification shall include the following information, as required, to describe adequately the desired material: 5.1.1 Quantity Quantit y, 5.1.2 ASTM specification specification number number and date of issue, 5.1.3 Name of material (Porcelain (Porcelain Enameling Enameling Sheet, Type Type I, Drawing Steel), 5.1.4 Condit Condition ion (oiled unless otherwise specified), specified), 5.1.5 5.1 .5 Finish (matte (du (dull) ll) fini finish sh will be sup suppli plied ed unl unless ess otherwise specified), 5.1.6 Enameling practice (for Type Type I, indicate if direct cover coat practice will be used), and 5.1.7 5.1 .7 Dimensi Dimensions ons (th (thickn ickness ess,, wid width, th, and len length gth for cut lengths, or thickness and width of coils).

9.1   Surface Finish Unless otherwise otherwise specifi specified, ed, the sheet Finish—  — Unless shall have a matte (dull) finish suitable for porcelain enameling. 9.2   Oiling— Unless Unless otherwise specified, the sheet shall be oiled. 10. Certificatio Certification n 10.1 Whe 10.1 When n req reques uested ted,, the man manufa ufactu cturer rer sha shall ll fur furnis nish h the resultss of the heat analysis made to determine compliance result compliance with this specification and shall include the purchase order number, ASTM designation number, and heat number correlating the results with the material represented.

NOTE 1—Not all producers are capable of meeting all of the limitations of the thic thickne kness ss tol tolera erance nce tab tables les in Spe Specifi cificat cation ion   A568/A568M. A568/A568M. The purchaser should contact the producer regarding possible limitations prior to placing an order.

TABLE 1 Chemical Composition A Element

5.1.8 5.1. 8 Co Coil il si size ze an and d we weig ight ht re requ quir irem emen ents ts (m (mus ustt in inclu clude de inside and outside diameters and maximum weight), 5.1.9 Application (show part identification and description), 5.1.10 5.1.1 0 Heat analysis (if required) required) (see 10.1 (see  10.1), ), and 5.1.11 5.1.1 1 Special requirements requirements (if any). 5.1.11.1 5.1.1 1.1 When the purch purchaser aser requires thickness tolerances  3 for  ⁄ 8 in. [10 mm] minimum edge distance (see Supplementary Requirement Requir ement in Specifi Specification cation A568/A568M  A568/A568M), ), this requirement shall be specified in the purchase order or contract.

Carbon M an ga n es e Phosphorus S ul f ur Other A

Composition, max, percent Type I

Type II

Type III

0.008B  0 .4 0 0. 02 0 0. 03 0

0 .0 5 0. 50 0 .0 2 0 0 .0 3 0

0 .0 2 0 .3 5 0. 02 0 0. 03 0

C

D 

Where aluminum is used as the deoxidizing agent, the aluminum content total by product analysis is usually in excess of 0.010 %. B  Heat analysis of carbon is not appropriate for Type I. Sheet product analysis is appropriate for checking proper type of material. C  Microalloy additions are permitted to meet special customer requirements. D  Columbium or titanium additions, or both, are made to combine with carbon and nitrogen to produce an interstitial-free steel.

NOTE 2—A typica typicall ordering descriptio description n is as follows: follows: 40 000 lb, ASTM A424 – -NN Porcelain Enameling Sheet, Type I, Drawing Steel, direct

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A424/A424M − 09a 11. Keywords 11.1 commerci commercial al ste steel; el; dec decarb arburi urizati zation; on; dra drawin wing g stee steel; l; enameling; interstitial free steel; porcelain

SUMMARY OF CHANGES Committee A01 has identified the location of selected changes Committee changes to this stand standard ard since the last issue (A424 (A424 – 09) that may impact the use of this standard. (Approved November 1, 2009.) (1)  Section 5.1.7.1 deleted (2)  Reversed order of 5.1.10 and 5.1.11 and added new Section 5.1.11.1.. 5.1.11.1

Committee A01 has identified the location of selected changes Committee changes to this stand standard ard since the last issue (A424 (A424 – 06) that may impact the use of this standard. (Approved April 1, 2009.) 1.3 added  added to make this a dual standard. (1)  Sections 1.2 and 1.3 (2)  Note 2—metric 2—metric ordering example added.

 Section 6.2  6.2 modified  modified to allow for metric thickness ordering (3)  Section (4)  Standard’s designation changed to recognize dual standard.

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