ASTM A918
Standard Specification for Steel Sheet, Zinc-Nickel Alloy Coated by the Electrolytic Process for Applications Requiring Designation of the Coating Mass on Each Surface
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About This Item
ASTM A918 is the ASTM standard for steel sheet coated with a zinc-nickel alloy by the electrolytic process when the coating mass must be designated on each surface. It provides a clear technical basis for specifying this type of coated sheet, helping buyers and producers align on coating expectations and product identification. As a procurement and quality reference, it supports more consistent ordering, inspection, and compliance for coated steel sheet applications where controlled surface coating mass matters.
ASTM A918 standard overview
The ASTM A918 standard focuses on steel sheet finished with a zinc-nickel alloy coating applied electrolytically. Its title indicates that the specification addresses products where the coating mass is designated separately for each surface, which is important for accurate material definition and acceptance. This makes the standard useful when a project requires a defined coated sheet specification rather than a general coating description. For technical and commercial teams, ASTM A918 helps establish a common reference for product requirements.
Where is ASTM A918 used?
This specification is commonly used in purchasing, manufacturing, and quality control settings that work with zinc-nickel alloy coated steel sheet. It is especially relevant when sheet material must be ordered, evaluated, or documented with coating mass requirements for each surface. The standard may be referenced during supplier qualification, incoming inspection, and material certification workflows. In practice, ASTM A918 helps connect product requirements with coated-sheet supply and verification processes.
Practical importance of ASTM A918
ASTM A918 matters because it supports clearer communication between specifiers, suppliers, and inspectors. By defining a recognized standard for electrolytically coated zinc-nickel alloy steel sheet, it helps reduce ambiguity in procurement and testing. That can improve consistency across orders and support quality control decisions when coating mass on each surface is part of the acceptance criteria. For organizations managing coated sheet materials, the standard offers a practical basis for compliance and product evaluation.
- Zinc-nickel alloy coated steel sheet
- Electrolytic coating process
- Coating mass by each surface
- Specification and procurement reference
- Quality control and material evaluation
- Publication Date: 2019-06-04
- Publisher: ASTM
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