ASTM A1063/A1063M-17
Standard Specification for Steel Sheet, Twin-Roll Cast, Zinc-Coated (Galvanized) by the Hot-Dip Process

Standard No.
ASTM A1063/A1063M-17
Release Date
2017
Published By
American Society for Testing and Materials (ASTM)
Status
Replace By
ASTM A1063/A1063M-19
Latest
ASTM A1063/A1063M-22
Scope

1.1 This specification covers steel sheet, produced by the Twin-Roll Cast Process (see Appendix X2) and zinc-coated (galvanized) by the hot-dip process in coils and cut lengths.

Note 1: See Appendix X2 for a description of the Twin-Roll Cast process.

1.2 The product is produced in various zinc coating weights [masses] or coating designations as shown in Table 1.

(A) The coating designation number is the term by which this product is specified. Because of the many variables and changing conditions that are characteristic of continuous hot-dip coating lines, the zinc coating is not always evenly divided between the two surfaces of a coated sheet; nor is it always evenly distributed from edge to edge. However, the minimum triple-spot average coating weight (mass) on any one side shall not be less than 408201;% of the single-spot requirement.
(B) As it is an established fact that the atmospheric corrosion resistance of zinc coated sheet products is a direct function of coating thickness (weight (mass)), the selection of thinner (lighter) coating designations will result in almost linearly reduced corrosion performance of the coating. For example, heavier galvanized coatings perform adequately in bold atmospheric exposure whereas the lighter coatings are often further coated with paint or a similar barrier coating for increased corrosion resistance. Because of this relationship, products carrying the statement “meets ASTM A1063/A1063Mrequirements” should also specify the particular coating designation.
(C) No minimum means that there are no established minimum requirements for triple- and single-spot tests.

1.3 Product furnished under this specification shall conform to the applicable requirements of the latest issue of Specification A924/A924M unless otherwise provided herein.

1.4 The product is available in a number of designations, grades and classes and in the two following general categories that are designed to be compatible with different application requirements.

1.4.1 Steels with mandatory chemical requirements and typical mechanical properties.

1.4.2 Steels with mandatory chemical requirements and mandatory mechanical properties.

1.5 This material is available in the following sizes:

1.5.1 Thickness—up to 0.078 in. [2.0 mm]