ASTM A424/A424M-18
(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 A568/A568M and A635/A635M. The appropriate General Requirements specification is applied based on the thickness and width of the product ordered.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: A424/A424M −18
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 U.S. Department of Defense.
1. Scope* A635/A635M Specification for Steel, Sheet and Strip,
Heavy-Thickness Coils, Hot-Rolled, Alloy, Carbon,
1.1 This specification covers sheet steel in coils and cut
Structural, High-Strength Low-Alloy, and High-Strength
lengths for porcelain enameling. The compositions and pro-
Low-Alloy with Improved Formability, General Require-
cessing of these steels are such that articles for porcelain
ments for
enameling may be fabricated from them and, under proper
A941 TerminologyRelatingtoSteel,StainlessSteel,Related
conditions, enameled. The steels are furnished as Type I, Type
Alloys, and Ferroalloys
II, and Type III. Type I and Type II are supplied in two
designations, Commercial Steel and Drawing Steel. Type III
3. Terminology
steel is interstitial-free and does not require a designation.
3.1 Definitions—For definitions of other terms used in this
1.2 The values stated in either SI units or inch-pound units
specification, refer to Terminology A941.
are to be regarded separately as standard. The values stated in
each system may not be exact equivalents; therefore, each
3.2 Definitions of Terms Specific to This Standard:
system shall be used independently of the other. Combining 3.2.1 base coat—also known as ground coat. This coating
values from the two systems may result in non-conformance
layer is applied directly to the steel and promotes adhesion of
with the standard. the coating system to the steel.
1.3 Tolerances are found in General Requirements Specifi- 3.2.2 cover coat—This coating layer is usually applied over
the base or ground coat to improve the appearance and provide
cationsA568/A568MandA635/A635M.TheappropriateGen-
eral Requirements specification is applied based on the thick- the proper color.
ness and width of the product ordered.
3.2.3 direct cover coat—This refers to a single coating
application that provides both adequate adhesion and appear-
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard- ance.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom- 4. Classification
mendations issued by the World Trade Organization Technical
4.1 Types:
Barriers to Trade (TBT) Committee.
4.1.1 Type I steel has an extremely low carbon level
achieved through sheet decarburization. This material is suit-
2. Referenced Documents
able for direct cover coat enameling practice, but this require-
2
2.1 ASTM Standards: ment must be indicated by the purchaser in accordance with
A568/A568M Specification for Steel, Sheet, Carbon, 5.1.6. This material is also suitable for ground and cover coat
Structural,andHigh-Strength,Low-Alloy,Hot-Rolledand enameling practice. It has good sag resistance and good
Cold-Rolled, General Requirements for 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
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
operations.
Stainless Steel and Related Alloysand is the direct responsibility of Subcommittee
A01.19 on Steel Sheet and Strip.
4.1.3 Type III is an interstitial-free steel and is suitable for
Current edition approved July 1, 2018. Published August 2018. Originally
applications where ground and cover coat enameling opera-
approved in 1958. Last previous edition approved in 2016 as A424/
tions are employed. The composition of the Type III steel is
A424M – 09a (2016). DOI: 10.1520/A0424_A0424M-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or obtained in melting operations. It has good sag resistance and
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
excellent formability.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 4.2 Product Designations:
*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
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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/A424M − 09a (Reapproved 2016) A424/A424M − 18
Standard Specification for
1
Steel, Sheet, for Porcelain Enameling
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 U.S. 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 Specifications A568/A568M and A635/A635M. The appropriate General
Requirements specification is applied based on the thickness and width of the product ordered.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
A568/A568M Specification for Steel, Sheet, Carbon, Structural, and High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled,
General Requirements for
A635/A635M 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
A941 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 A941.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 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.
3.2.2 cover coat—This coating layer is usually applied over the base or ground coat to improve the appearance and provide the
proper color.
3.2.3 direct cover coat—This refers to a single coating application that provides both adequate adhesion and appearance.
4. Classification
4.1 Types:
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloysand is the direct responsibility of Subcommittee A01.19
on Steel Sheet and Strip.
Current edition approved May 1, 2016July 1, 2018. Published May 2016August 2018. Originally approved in 1958. Last previous edition approved in 20092016 as
A424/A424M – 09a.A424/A424M – 09a (2016). DOI: 10.1520/A0424_A0424M-09AR16.10.1520/A0424_A0424M-18.
2
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 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 ----------------------
A424/A424M − 18
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
...
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