Steel Sheet, 55 % Aluminum-Zinc Alloy-Coated by the Hot-Dip Process

A792/A792M-10: Standard Specification for Steel Sheet, 55 % Aluminum-Zinc Alloy-Coated by the Hot-Dip Process

For engineers and designers working with materials that demand exceptional corrosion and heat resistance, understanding ASTM A792/A792M-10 is essential. This authoritative standard provides the foundational requirements for a high-performance metallic-coated steel sheet, crucial for extending the service life and reliability of a wide array of manufactured goods and structures. Mastering this specification ensures optimal material selection and application, directly impacting project success and product durability.

What is A792/A792M-10?

ASTM A792/A792M-10 is the industry-leading standard that defines the specifications for steel sheet coated with a 55% aluminum-zinc alloy via a hot-dip process. Developed by ASTM International, this comprehensive document ensures that the produced steel sheet meets stringent quality and performance criteria for applications requiring superior protection against environmental degradation and elevated temperatures.

Scope & Purpose

This standard governs the production and procurement of 55% aluminum-zinc alloy-coated steel sheet, available in both coils and cut lengths. Its primary purpose is to provide a reliably performing material for applications where corrosion resistance, heat resistance, or a combination of both is paramount. The specification outlines various designations, types, and grades tailored to diverse application needs, ensuring compatibility and performance. It explicitly references the general requirements detailed in Specification A924/A924M for hot-dip coated steel sheet, establishing a clear framework for understanding and application.

Who Must Comply?

• • Primary audience: Materials Engineers, Metallurgists, Quality Assurance Inspectors, Production Managers, and Procurement Specialists.
• • Industries affected: Steel Manufacturing, Construction, Automotive, Appliance Manufacturing, and Architecture.
• • Compliance nature: Voluntary, but widely adopted as an industry benchmark and often specified in contracts.
• • Enforcement: Typically enforced through contractual agreements and quality control procedures by manufacturers and end-users.

Key Requirements Overview

The standard requires that the steel sheet base metal conforms to specific chemical composition requirements depending on its designation (e.g., Commercial Steel, Drawing Steel, High Temperature Steel, Structural Steel). Professionals must ensure that the 55% aluminum-zinc alloy coating composition meets the specified weight and uniformity standards, detailed through coating designations like AZ55. Key provisions include adherence to mechanical property requirements for structural steel grades and compatibility with general requirements outlined in ASTM A924/A924M, which covers aspects like coating tests and mechanical property testing methods.

Related Standards & References

ASTM A792/A792M-10 works in conjunction with ASTM A924/A924M, which provides the essential general requirements for all hot-dip coated steel sheet products. Additionally, ASTM A90/A90M is referenced for testing the weight of the coating, a critical parameter for ensuring the specified level of corrosion protection is met. Understanding these complementary standards is vital for a comprehensive grasp of the material's performance characteristics and testing protocols.