ASTM A 424/A424M : 2018

1.1 This specification covers sheet steel in coils and cutlengths for porcelain enameling. The compositions and processingof 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, 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, eachsystem 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 SpecificationsA568/A568M and A635/A635M. The appropriate GenealRequirements specification is applied based on the thicknessand width of the product ordered..4 This international standard was developed in accordancewith internationally recognized principles on standardizationestablished in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendationsissued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee