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This specification covers standard specification for steel sheet metallic coated by the hot-dip process and coil-coated with organic films for exterior exposed building products. The substrate shall conform to all requirements of the appropriate specification for the steel sheet product. Material classification includes zinc-coated (galvanized), aluminum-zinc alloy-coated, and aluminum coated steel sheets. The recommended minimum coating mass designations for use in exterior exposed building applications shall be indicated. The properties of the substrate and the organic coating system, combined with the method of forming, shall determine the life expectancy and general appearance of the final product.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification covers steel sheet metallic coated by the hot-dip process and coil-coated with organic films for exterior exposed building products. Sheet of this designation is furnished in coils, cut lengths, and formed cut lengths. Building products include corrugated and various types of roll and brake-formed configurations.
1.2 The substrate is available in several different metallic-coated steel sheet products as enumerated in 4.1, depending on the requirements of the purchaser.
1.3 Coating systems supplied under this specification consist of a primer coat covered by various types and thicknesses of top coats. The combination of primer and top coat is classed as either a two-coat thin-film system or as a two-coat (or more) thick-film system. Typical top-coating materials are: polyester, silicone polyester, acrylic, fluoropolymer, plastisol, or polyurethane.
1.4 This specification is applicable to orders in either inch-pound units (as A755) or SI units [as A755M]. Values in inch-pound units and SI units are not necessarily equivalent. Within the text, SI units are shown in brackets. Each system shall be used independently of each other.
1.5 Unless the order specifies the “M” designation (SI units) the product shall be furnished to inch-pound units.
1.6 The text of this specification references notes and footnotes that provide explanatory material. These notes and footnotes, excluding those in tables and figures, shall not be considered as requirements of this specification.
1.7 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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A463/A463M Specification for Steel Sheet, Aluminum-Coated, by the Hot-Dip Process
A653/A653M Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process
A792/A792M Specification for Steel Sheet, 55 % Aluminum-Zinc Alloy-Coated by the Hot-Dip Process
A875/A875M Specification for Steel Sheet, Zinc-5 % Aluminum Alloy-Coated by the Hot-Dip Process
A902 Terminology Relating to Metallic Coated Steel Products
A924/A924M Specification for General Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip Process
A1046/A1046M Specification for Steel Sheet, Zinc-Aluminum-Magnesium Alloy-Coated by the Hot-Dip Process
A1063/A1063M Specification for Steel Sheet, Twin-Roll Cast, Zinc-Coated (Galvanized) by the Hot-Dip Process
B117 Practice for Operating Salt Spray (Fog) Apparatus
D522 Test Methods for Mandrel Bend Test of Attached Organic Coatings
D523 Test Method for Specular Gloss
D659 Method for Evaluating Degree of Chalking of Exterior Paints
D714 Test Method for Evaluating Degree of Blistering of Paints
D822 Practice for Filtered Open-Flame Carbon-Arc Exposures of Paint and Related Coatings
D870 Practice for Testing Water Resistance of Coatings Using Water Immersion
D1005 Test Method for Measurement of Dry-Film Thickness of Organic Coatings Using Micrometers
D1654 Test Method for Evaluation of Painted or Coated Specimens Subjected to Corrosive Environments
D1735 Practice for Testing Water Resistance of Coatings Using Water Fog Apparatus
D2240 Test Method for Rubber Property--Durometer Hardness
D2244 Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
D2247 Practice for Testing Water Resistance of Coatings in 100 % Relative Humidity
D2370 Test Method for Tensile Properties of Organic Coatings
D3359 Test Methods for Measuring Adhesion by Tape Test
D3363 Test Method for Film Hardness by Pencil Test
D4145 Test Method for Coating Flexibility of Prepainted Sheet
D4214 Test Methods for Evaluating the Degree of Chalking of Exterior Paint Films
G85 Practice for Modified Salt Spray (Fog) Testing
ICS Number Code 91.060.20 (Roofs)
UNSPSC Code 30264100(Steel alloy sheets)