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DIN 1653:2021
Surface finish of steel wires - Designations and abbreviations thereof
This document specifies designations and their abbreviations for the surface finish of steel wires. This standard is applicable to steel wires whose surface finish results from the operations normally used in wire refining. This standard does not apply to steel wires whose surface finish is obtained by special processes. These include steel wires with coatings produced by galvanic (electrolytic) nickel plating, chromium plating, cadmium plating, etc., or by enamelling, or whose already existing metallic coatings are subsequently chemically treated.
Deutsches Institut für Normung [din]