Steel Sheet, Twin-Roll Cast, Zinc-Coated (Galvanized) by the Hot-Dip Process

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

For engineers and designers working with corrosion-resistant steel sheet, understanding the nuances of material specifications is paramount to project success. ASTM A1063/A1063M provides an authoritative framework for specifying steel sheet produced via the twin-roll cast process and subsequently hot-dip galvanized, offering a proven path to reliable material selection for a wide array of applications.

What is A1063/A1063M?

ASTM A1063/A1063M is an essential industry standard that defines the requirements for steel sheet manufactured using the twin-roll casting method and then coated with zinc via the hot-dip process. Its primary purpose is to ensure uniformity and quality in the production of this specific type of galvanized steel sheet, making it suitable for demanding fabrication and end-use environments.

Scope & Purpose

This comprehensive standard governs the production, properties, and testing of twin-roll cast steel sheet that has undergone hot-dip galvanizing. It covers both coils and cut lengths, specifying available coating weights (masses) and designations. While the standard outlines general requirements for steel sheet, it specifically addresses the unique characteristics imparted by the twin-roll casting process and the subsequent galvanization. It does not, however, cover the application of post-coating treatments or secondary fabrication processes.

Who Must Comply?

• • Primary Audience: Materials Engineers, Manufacturing Engineers, Quality Control Inspectors, Production Managers, and Steel Buyers.
• • Industries Affected: Steel Manufacturing, Metal Fabrication, Automotive, Construction, Appliance Manufacturing, and General Manufacturing.
• • Compliance Nature: Voluntary, though often mandated by customer specifications and project requirements.
• • Enforcement: Compliance is typically verified through internal quality control measures by manufacturers and by third-party inspection agencies or customer audits during material procurement and fabrication.

Key Requirements Overview

Professionals utilizing ASTM A1063/A1063M must ensure:

• • Material Composition and Properties: The standard requires adherence to specific chemical composition limits and, in certain grades, mandatory mechanical property requirements, catering to diverse application needs from commercial to high-strength low-alloy steels.
• • Twin-Roll Casting Process: While the standard doesn't dictate the process itself, it acknowledges and is based on steel produced via the twin-roll casting method, which influences material characteristics.
• • Hot-Dip Galvanizing Quality: Provisions cover various zinc coating weights and designations, ensuring adequate corrosion protection. Testing methods, such as triple-spot and single-spot tests, are referenced to verify coating adherence and mass.
• • Dimensional Tolerances: Requirements for the thickness and width of the steel sheet are delineated, crucial for formability and fit during fabrication.
• • Referenced General Requirements: The specification mandates compliance with the general requirements outlined in ASTM A924/A924M for metallic-coated steel sheet, ensuring a holistic approach to quality.

Related Standards & References

ASTM A1063/A1063M integrates seamlessly with other ASTM standards. Notably, ASTM A924/A924M provides essential