ASTM A424/A424M-09
(Specification)Standard Specification for Steel, Sheet, for Porcelain Enameling
Standard Specification for Steel, Sheet, for Porcelain Enameling
ABSTRACT
This specification covers standard requirements for sheet steel in coils and cut lengths for porcelain enameling. Heat analysis of Type I, Type II, and Type III steels shall conform to the prescribed chemical composition for carbon, manganese, phosphorus, sulfur, and others. However, an exception is made on carbon, since heat analysis of carbon is not appropriate for Type I. The material shall also conform to the required mechanical properties such as bending and formability.
SCOPE
1.1 This specification covers sheet steel in coils and cut lengths for porcelain enameling. The compositions and processing of these steels are such that articles for porcelain enameling may be fabricated from them and, under proper conditions, enameled. The steels are furnished as Type I, Type II, and Type III. Type I and Type II are supplied in two designations, Commercial Steel and Drawing Steel. Type III steel is interstitial-free and does not require a designation.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.3 Tolerances are found in General Requirements Specifications A 568/A 568M and A 635/A 635M. The appropriate General Requirements specification is applied based on the thickness and width of the product ordered.
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Designation: A424/A424M – 09
Standard Specification for
1
Steel, Sheet, for Porcelain Enameling
This standard is issued under the fixed designationA424/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. Scope* 3. Terminology
1.1 This specification covers sheet steel in coils and cut 3.1 Definitions—For definitions of other terms used in this
lengths for porcelain enameling. The compositions and pro- specification, refer to Terminology A941.
cessing of these steels are such that articles for porcelain 3.2 Definitions of Terms Specific to This Standard:
enameling may be fabricated from them and, under proper 3.3 base coat—also known as ground coat. This coating
conditions, enameled. The steels are furnished as Type I, Type layer is applied directly to the steel and promotes adhesion of
II, and Type III. Type I and Type II are supplied in two the coating system to the steel.
designations, Commercial Steel and Drawing Steel. Type III 3.4 cover coat—This coating layer is usually applied over
steel is interstitial-free and does not require a designation. the base or ground coat to improve the appearance and provide
1.2 The values stated in either SI units or inch-pound units the proper color.
are to be regarded separately as standard. The values stated in 3.5 direct cover coat—This refers to a single coating
each system may not be exact equivalents; therefore, each application that provides both adequate adhesion and appear-
system shall be used independently of the other. Combining ance.
values from the two systems may result in non-conformance
4. Classification
with the standard.
1.3 Tolerances are found in General Requirements Specifi- 4.1 Types:
4.1.1 Type I steel has an extremely low carbon level
cationsA568/A568M andA635/A635M.The appropriate Gen-
eral Requirements specification is applied based on the thick- achieved through sheet decarburization. This material is suit-
able for direct cover coat enameling practice, but this require-
ness and width of the product ordered.
ment must be indicated by the purchaser in accordance with
2. Referenced Documents
5.1.6. This material is also suitable for ground and cover coat
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2.1 ASTM Standards: enameling practice. It has good sag resistance and good
A568/A568M Specification for Steel, Sheet, Carbon, Struc- formability.
tural, and High-Strength, Low-Alloy, Hot-Rolled and 4.1.2 Type II steel is suitable for applications where ground
Cold-Rolled, General Requirements for and cover coat enameling operations are employed. The
A635/A635M Specification for Steel, Sheet and Strip, composition of the Type II steel is obtained in melting
Heavy-Thickness Coils, Hot-Rolled,Alloy, Carbon, Struc- operations.
tural, High-Strength Low-Alloy, and High-Strength Low- 4.1.3 Type III is an interstitial-free steel and is suitable for
Alloy with Improved Formability, General Requirements applications where ground and cover coat enameling opera-
for tions are employed. The composition of the Type III steel is
A941 Terminology Relating to Steel, Stainless Steel, Re- obtained in melting operations. It has good sag resistance and
lated Alloys, and Ferroalloys excellent formability.
4.2 Product Designations:
4.2.1 Commercial Steel is intended for parts where bend-
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
ing, moderate forming, or moderate drawing may be involved.
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
4.2.2 Drawing Steel is intended for fabricating identified
A01.19 on Steel Sheet and Strip.
Current edition approved April 1, 2009. Published April 2009. Originally
parts where the draw is particularly severe or where the
approved in 1958. Last previous edition approved in 2006 as A424 – 06. DOI:
material shall be essentially free of changes in mechanical
10.1520/A0424_A0424M-09.
2
properties over a period of time. Drawing Steel should be
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM specified where the formed material shall be essentially free of
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 – 09
direct cover coat, 0.048 in. by 3
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This 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. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:A424–06 Designation: A 424/A 424M – 09
Standard Specification for
1
Steel, Sheet, for Porcelain Enameling
This standard is issued under the fixed designationA 424/A 424M; 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. Scope*
1.1 This specification covers sheet steel in coils and cut lengths for porcelain enameling. The compositions and processing of
these steels are such that articles for porcelain enameling may be fabricated from them and, under proper conditions, enameled.
The steels are furnished as Type I, Type II, and Type III. Type I and Type II are supplied in two designations, Commercial Steel
and Drawing Steel. Type III steel is interstitial-free and does not require a designation.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
1.3 Tolerances are found in General Requirements SpecificationsA 568/A 568M andA 635/A 635M. The appropriate General
Requirements specification is applied based on the thickness and width of the product ordered.
2. Referenced Documents
2
2.1 ASTM Standards:
A 568/A 568M Specification for Steel, Sheet, Carbon, Structural, and High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled,
General Requirements for
A 635/A 635M Specification for Steel, Sheet and Strip, Heavy-Thickness Coils, Hot-Rolled, Alloy, Carbon, Structural,
High-Strength Low-Alloy, and High-Strength Low-Alloy with Improved Formability, General Requirements for
A 941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
3. Terminology
3.1 Definitions— For definitions of other terms used in this specification, refer to Terminology A 941.
3.2 Definitions of Terms Specific to This Standard:
3.3 base coat—also known as ground coat. This coating layer is applied directly to the steel and promotes adhesion of the
coating system to the steel.
3.4 cover coat—This coating layer is usually applied over the base or ground coat to improve the appearance and provide the
proper color.
3.5 direct cover coat—This refers to a single coating application that provides both adequate adhesion and appearance.
4. Classification
4.1 Types:
4.1.1 Type I steel has an extremely low carbon level 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 enameling practice. It has good sag resistance and good formability.
4.1.2 Type II steel is suitable for applications where ground and cover coat enameling operations are employed. The
composition of the Type II steel is obtained in melting operations.
4.1.3 Type III is an interstitial-free steel and is suitable for applications where ground 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.
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of SubcommitteeA01.19
on Steel Sheet and Strip.
Current edition approved MarchApril 1, 2006.2009. Published March 2006.April 2009. Originally approved in 1958. Last previous edition approved in 20002006 as
A 424 – 006.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. 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.
1
---------------------- Page: 1 ----------------------
A 424/A 424M – 09
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 Steel is intended for fabricating
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