ASTM A875/A875M-23 pdf free download – Standard Specification For Steel Sheet, Zinc-5 % Aluminum Alloy-Coated By The Hot-Dip Process.
This specification ASTM A875/A875M-23 covers steel sheet, metallic-coated with zinc-5 % aluminum alloy via the hot dip process, in coils and cut lengths. 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]) as shown in Table 1.
1.3 The product is intended for applications requiring corrosion resistance, formability, and paintability.
1.4 The product is available in a number of designations, grades, and classes in four general categories that are designed to be compatible with different application requirements.
1.4.1 Steels with mandatory chemical requirements and typical mechanical properties.
1.4.2 Steels with mandatory chemical requirements and mandatory mechanical properties.
1.4.3 Steels with mandatory chemical requirements and mandatory mechanical properties that are achieved through solid-solution or bake hardening.
1.5 The product furnished under this specification shall conform to the applicable requirements of the latest issue of Specification A924/A924M, unless otherwise provided herein.
1.6 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.
1.7 Units—This specification is applicable to orders in either inch-pound units (as A875) or metric (SI) units [as A875M]. Values in inch-pound and SI units are not necessarily equivalent. Within the text, the SI units are shown in brackets. Each system shall be used independently of the other.
2.Referenced Documents2.1 ASTM Standards:
A90/A90M Test Method for Weight [Mass] of Coating onIron and Steel Articles with Zinc or Zinc-Alloy CoatingsA370 Test Methods and Definitions for Mechanical Testingof Steel Products
A568/A568M Specification for Steel，Sheet，Carbon,Structural, and High-Strength, Low-Alloy, Hot-Rolled andCold-Rolled,General Requirements for
A902 Terminology Relating to Metallic Coated Steel Products
A924/A924M Specification for General Requirements forSteel Sheet，Metallic-Coated by the Hot-Dip ProcessA1122/A1122M Test Method for Bend Testing of Metallic-Coated Steel Sheet to Evaluate Coating Adhesion
B750 Specification for GALFAN (Zinc-5 % Aluminum-Mischmetal)Alloy in Ingot Form for Hot-Dip CoatingsE517’Test Method for Plastic Strain Ratio r for Sheet MetalE646 Test Method for Tensile Strain-Hardening Exponents(n -Values) of Metallic Sheet Materials
1.8 Unless the order specifies the “M” specification designation (SI units), the material shall be furnished to inch-pound units.
S1.Base Metal Thickness:
S1.1 The specified minimum thickness shall apply to thebase metal only.
S1.2 The coating designation shown on the order indicatesthe coating to be applied to the specified minimum base metalthickness.
S1.3 Tables 15 and A1.12 Thickness Tolerances for ColdRolled Sheet (all designations) -1 in. [25-mm] Minimum EdgeDistance and Tables S1.3 and S1.6 Thickness Tolerances forCold Rolled (All Designations) – 3/8-in. [10-mm] MinimumEdge Distance of Specification A568/A568M.
