ISO 3575-2025 PDF

Full title and description

ISO 3575:2025 — Continuous hot-dip zinc-coated and zinc-iron alloy-coated carbon steel sheet of commercial and drawing qualities. This International Standard specifies requirements for continuous hot-dip metallic coatings (zinc and zinc‑iron alloy) on carbon steel sheet supplied in coils and cut lengths, intended for corrosion resistance, formability and paintability.

Abstract

Specifies designation systems, coating masses and coating conditions, surface treatments, mechanical property and dimensional requirements, sampling and test methods, inspection and marking for continuously hot‑dip zinc and zinc‑iron alloy coated carbon steel sheet of commercial and drawing qualities. Does not cover steels of structural quality (see related ISO 4998).

General information

• Status: Published (International Standard)
• Publication date: 1 April 2025 (April 2025)
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 77.140.50 (Flat steel products and semi‑products)
• Edition / version: 6th edition (ISO 3575:2025, ed. 6)
• Number of pages: 17 pages

Scope

Applies to carbon steel sheet of commercial and drawing qualities metallic‑coated by the continuous hot‑dip process with zinc and zinc‑iron alloy coatings. The standard covers product designation, coating mass classes, surface finishes and treatments, ordering conditions, dimensional tolerances, sampling and test methods and inspection/acceptance criteria for coils and cut lengths intended for applications requiring corrosion resistance, forming and paintability. Structural‑quality steels are excluded (see ISO 4998:2023 for structural grades).

Key topics and requirements

• Product designation system for coated sheet (grades, coating types and ordering conditions).
• Coating mass classes (zinc/zinc‑iron mass per unit area) and associated minimum coating requirements.
• Surface finishes and treatments to support formability and paintability (pre‑treatment, passivation/chemical treatments).
• Dimensional tolerances (thickness, width, flatness) and coil size/weight limits.
• Mechanical property requirements for commercial and drawing qualities (yield, tensile, elongation where specified).
• Sampling, test methods and inspection (coating mass measurement, adhesion, visual appearance, mechanical testing, re‑test rules).
• Marking, documentation and purchaser information to be supplied (ordering data and acceptance criteria).

Typical use and users

Primary users include steel producers and coating line operators, purchasers and specifiers of coated sheet, automotive and appliance manufacturers, metal fabricators, furniture and HVAC component makers, paint and coating suppliers, and quality/inspection personnel who require standardized requirements for hot‑dip galvanized and zinc‑iron coated sheet for forming, painting and corrosion resistance applications.

Related standards

Key related documents and equivalents commonly referenced alongside or in place of ISO 3575 include: ISO 4998 (requirements for structural‑quality hot‑dip zinc/zinc‑iron coated steel sheet), EN 10346 (continuous hot‑dip coated steel flat products — European practice), and ASTM A653/A653M (hot‑dip galvanised steel sheet and strip — American practice). ISO 3575:2025 replaces earlier editions of ISO 3575 (for example the 2016 edition).

Keywords

hot‑dip galvanised, zinc coating, zinc‑iron alloy, coated steel sheet, galvanized sheet, commercial quality, drawing quality, coating mass, formability, paintability, ISO/TC 17/SC 12

FAQ

Q: What is this standard?

A: ISO 3575:2025 is an international standard specifying requirements for continuous hot‑dip zinc and zinc‑iron alloy coated carbon steel sheet in commercial and drawing qualities (coils and cut lengths).

Q: What does it cover?

A: It covers product designation, coating mass classes, surface treatments, dimensional and mechanical requirements, sampling and test methods, inspection, marking and ordering information for coated sheet intended for corrosion resistance, forming and painting. It excludes structural‑quality steels (covered by ISO 4998).

Q: Who typically uses it?

A: Steel mills, coating line operators, purchasers and specifiers, manufacturers of formed and painted metal components (automotive, appliances, HVAC, furniture), fabricators and quality/inspection teams.

Q: Is it current or superseded?

A: Current — ISO 3575:2025 was published in April 2025 and supersedes earlier editions (for example ISO 3575:2016 and prior editions).

Q: Is it part of a series?

A: It is maintained by ISO/TC 17/SC 12 and sits with related ISO standards for coated steel sheets — notably ISO 4998 (structural quality) and other ISO documents addressing coated flat steel products and testing methods.

Q: What are the key keywords?

A: Hot‑dip, zinc, zinc‑iron alloy, galvanized, coated steel sheet, coating mass, commercial quality, drawing quality, formability, paintability.