ASTM A917-08(R2020) pdf free download

ASTM A917-08(R2020) pdf free download.Standard Specification for Steel Sheet, Coated by the Electrolytic Process for Applications Requiring Designation of the Coating Mass on Each Surface (General Requirements)
1. Scope
1.1 This specification covers hot-rolled and cold-rolled steel sheet coated by the electrolytic process. Coatings can be comprised ofpure metals or metal alloys. For specific coatings, refer to Specifications A879/A879M and A918. 1.2 The product shall be coated on one or both surfaces with equal or differential coating masses on the two surfaces. Sheet-coated with equal coating masses on each surface has similar levels of corrosion protection on each surface. Often, however, a higher level of corrosion protection is required on one surface than is required on the other. In these situations, one surface shall be specified with a heavier coating mass than the other. Either surface, when specified to be painted, will provide additional corrosion protection as compared to an unpainted surface. 1.3 This coating process has essentially no effect on the base metal mechanical properties, and use is permitted on any grade of hot-rolled or cold-rolled steel sheet. The coated sheet is available as Commercial Steel (CS), Drawing Steel (DS), Deep Drawing Steel (DDS), Extra-Deep Drawing Steel (EDDS), Structural Steel (SS) High-Strength Low-Alloy Steel (HSLAS), High-Strength Low-Alloy Steel with Improved Formability (HSLAS-F), Solution-Hardened Steel (SHS), or Bake-Hardenable Steel (BHS). 1.4 The values stated in SI units are to be regarded as the standard. 1.5 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
7. Base Metal Requirements
7.1 The steel shall conform to all of the requirements of the appropriate specification listed as follows for the steel ordered. Where reference is made to a combined standard (such as Specification A1011/A1011M), conformance shall be to the metric portion, using SI units of measurement as standard. 7.1.1 Hot Rolled: 7.1.1.1 Commercial Steel (CS), Drawing Steel (DS), Struc- tural Steel (SS), High-Strength Low-Alloy Steel (HSLAS), and High-Strength Low-Alloy Steel with Improved Formability (HSLAS-F)—Specification A1011/A1011M. 7.1.2 Cold Rolled: 7.1.2.1 Commercial Steel (CS), Drawing Steel (DS), Deep Drawing Steel (DDS), Extra-Deep Drawing Steel (EDDS), Structural Steel (SS), High-Strength Low-Alloy Steel (HSLAS), High-Strength Low-Alloy Steel with Improved Formability (HSLAS-F), Solution-Hardened Steel (SHS), and Bake- Hardenable Steel (BHS)—Specification A1008/A1008M. 7.2 Base Metal Specimens: 7.2.1 Test specimens shall be prepared from finished mate- rial and tested in accordance with Test Methods and Definitions A370. 7.2.2 In determining the base metal mechanical properties, one ofthe following methods shall be used. Unless specified in the order, the producer shall determine the method to be used; however, in the event of a dispute the method in 7.2.2.1 shall be used.7.2.2.1 The base metal thickness shall be measured after stripping the coating from the ends of the specimen contacting the grips of the tension testing machine before testing. 7.2.2.2 The base metal thickness shall be determined by subtracting the coating thickness from the measured thickness of the tension test specimen. The coating thickness shall be calculated from the coating mass test. 7.2.3 When the percent elongation in the tension test is less than the specified minimum and any part of the fracture is outside the middle half of the gage length as scribed before the test, the test shall be discarded and a retest shall be permitted. 7.3 Retests for Base Metal Mechanical Properties—If one test fails for base metal mechanical requirements, retesting shall conform to the provisions of the applicable base metal specification.