ASTM A875/A875M-02 - 10.6.2002
 
1. Scope

1.1 This specification covers steel sheet, in coils and cut lengths, metallic-coated by the hot-dip process, with zinc-5 % aluminum alloy coating. The Zn-5Al alloy coating also contains small amounts of elements other than zinc and aluminum that are intended to improve processing and the characteristics of the coated product.

1.2 The coating is produced as two types: zinc-5 % aluminum-mischmetal alloy (Type I) and zinc-5 % aluminum-0.1 % magnesium alloy (Type II), and in two coating structures (classes). The coated sheet is produced in several coating designations (coating weight [mass]).

1.3 The material is intended for applications requiring corrosion resistance, formability, and paintability.

1.4 The steel sheet is produced in a number of designations, types, grades, and classes designed to be compatible with differing application requirements.

1.5 Coated sheet material furnished under this specification shall conform to the applicable requirements of the latest issue of Specification A 924/A 924M, unless otherwise provided herein.

1.6 This specification is applicable to orders in either inch-pound units (as A 875) or metric (SI) units [as A 875M]. Values in inch-pound and SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents. Therefore, each system shall be used independently of the other.

1.7 Unless the order specifies the "M" specification designation (SI units), the material shall be furnished to inch-pound units.

1.8 The text of this specification references notes and footnotes that provide explanatory material. These notes and footnotes, excluding tables and figures, shall not be considered as requirements of this specification.

1.9 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

 
2. Referenced Documents

A902-24

Standard Terminology Relating to Metallic Coated Steel Products

E517-24

Standard Test Method for Plastic Strain Ratio r for Sheet Metal

B750-22

Standard Specification for GALFAN (Zinc-5 % Aluminum-Mischmetal) Alloy in Ingot Form for Hot-Dip Coatings

E47-93

Standard Test Methods for Chemical Analysis of Zinc Die-Casting Alloys (Withdrawn 1997)

E646-16(2024)

Standard Test Method for Tensile Strain-Hardening Exponents (n -Values) of Metallic Sheet Materials

E1277-23

Standard Test Method for Analysis of Zinc-5 % Aluminum-Mischmetal Alloys by Inductively Coupled Plasma Atomic Emission Spectrometry

ISO?14788

Continuous Hot-Dip Zinc-5?% Aluminum Alloy Coated Steel Sheet and Coils

GF-1

Standard Practice for Determination of Cerium and Lanthanum Compositions in Galfan Alloy (5?% Al-0.4?% La-0.4?% Ce-Bal SHG ZN)

A90/A90M-21

Standard Test Method for Weight [Mass] of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings

A924/A924M-26

Standard Specification for General Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip Process