ASTM A463/A463M-25 PDF

Full title and description

ASTM A463/A463M-25 — Standard Specification for Steel Sheet, Aluminum-Coated, by the Hot‑Dip Process. This specification defines aluminum‑coated steel sheet (in coils and cut lengths) produced by hot‑dip aluminum coating, including allowable coating types and weights, base‑metal chemical and mechanical requirements, and required tests (coating weight, bend tests, and heat analysis requirements).

Abstract

This standard covers aluminum‑coated steel sheet furnished in coils and cut lengths with two types of hot‑dip aluminum coating and several coating weights. It specifies chemical composition limits for the base metal, mechanical property requirements for structural and HSLA steels, and required coating and bend tests. Units are provided in inch‑pound (A463) and SI (A463M) versions; the purchaser may specify the “M” designation for SI units.

General information

• Status: Active (latest published/revised edition in the 2025 series).
• Publication date: Issued/updated in 2025 (document activity and amendments recorded in December 2025).
• Publisher: ASTM International.
• ICS / categories: Flat steel products and semi‑products — ICS code commonly listed as 77.140.50.
• Edition / version: A463/A463M‑25 (including 25A / 25B variant listings as published/updated in late 2025).
• Number of pages: Typically a short specification (listed as 6–7 pages depending on the specific release/format).

Scope

The scope covers aluminum‑coated steel sheet produced by the hot‑dip process, available in coils and cut lengths, with two types of aluminum coating and multiple coating weights. The specification requires conformity to referenced requirements (notably Specification A924/A924M where applicable), defines units of measurement (inch‑pound or SI with the “M” designation), and states that notes and footnotes are explanatory only and not requirements of the standard.

Key topics and requirements

• Definitions of coating types and permitted coating weights (masses) for hot‑dip aluminum coatings.
• Chemical analysis requirements for the base steel (heat analysis limits).
• Mechanical property requirements for structural and high‑strength low‑alloy steels where applicable.
• Required tests: coating‑weight measurements and bend tests to verify coating integrity and ductility.
• Unit systems: inch‑pound (A463) and SI (A463M) are both supported; specification clarifies unit independence.
• Reference and conformity requirements to related ASTM specifications (for example A924/A924M as applicable).

Typical use and users

This specification is used by steel producers, galvanizers/hot‑dip coaters, fabricators, architects, engineers, and purchasers who require aluminum‑coated steel sheet for corrosion resistance, architectural panels, roofing and cladding components, and other applications where aluminum metallic coatings are specified. It is referenced in procurement documents, quality control procedures, and inspection/test plans for coated steel sheet.

Related standards

Commonly referenced ASTM standards include A924/A924M (for metallic-coated products), and other ASTM specifications addressing steel sheet dimensions, mechanical testing, and coating test methods. Related specifications and test methods (for coating mass, bend testing, and material analysis) are cited within the text of A463/A463M‑25.

Keywords

aluminum‑coated steel, hot‑dip aluminum coating, coated steel sheet, A463, A463M, coating weight, bend test, A924/A924M, metallic coatings, flat steel products.

FAQ

Q: What is this standard?

A: ASTM A463/A463M‑25 is the ASTM International specification that defines requirements for steel sheet coated with aluminum by the hot‑dip process (available in inch‑pound and SI versions).

Q: What does it cover?

A: It covers aluminum‑coated steel sheet supplied in coils and cut lengths, specifying coating types and weights, base‑metal chemical and mechanical requirements, and mandatory tests such as coating‑weight measurements and bend tests.

Q: Who typically uses it?

A: Steel manufacturers, coating processors, fabricators, architects, engineers, specifiers, and procurement professionals who need aluminum‑coated steel for corrosion protection and architectural or industrial applications.

Q: Is it current or superseded?

A: The A463/A463M‑25 release is the current 2025 edition (active as of late 2025, with amendment activity recorded in December 2025). Purchasers should verify the exact active variant (25, 25A, or 25B) and any amendments before using the document.

Q: Is it part of a series?

A: Yes — A463/A463M is part of ASTM's series of specifications for metallic‑coated steel products and ties into other ASTM standards that govern metallic coatings, testing methods, and sheet/coil products (for example A924/A924M and related test method standards).

Q: What are the key keywords?

A: aluminum‑coated steel, hot‑dip process, coating weight, bend test, A463, A463M, metallic coatings, flat steel products.