BS EN ISO 28319:2018 pdf download – Dentistry – Laser welding and filler materials (ISO 28319:2018) This document specifies requirements and test methods for laser welding and the filler materialsthereto used in the dental laboratory for welding of metallic restorations and appliances. For filler materials used in laser welding, this document also specifies the information given in theinstructions for use, marking and labelling. 2 Normative references The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references, only the edition cited applies. Forundated references, the latest edition of the referenced document (including any amendments) applies. ISO 1942, Dentistry — Vocabulary ISO 6344-1, Coated abrasives — Grain size analysis — Part 1: Grain size distribution test ISO 10271:2011, Dentistry — Corrosion test methods for metallic materials ISO 15223-1:2016, Medical devices — Symbols to be used with medical device labels, labelling and information to be supplied — Part 1: General requirements ISO 22674:2016, Dentistry — Metallic materials for fixed and removable restorations and appliances 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 1942, ISO 22674 and thefollowing apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — IEC Electropedia: available at http://www.electropedia.org/ — ISO Online browsing platform: available at https://www.iso.org/obp 3.1 laser welding method for joining similar or dissimilar metallic materials, using a laser beam as the heat source, withor without a metallic filler material (welding rod), which produces coalescence by melting abuttingzones of metallic material components thereby creating a common fusion zone 3.2 filler material <laser welding> metallic filling material used for laser welding (3.1) 4.4 Corrosion resistance 4.4.1 Static immersion test When pieces of a single metallic material are joined, the metal ion release shall not exceed 200 μg cm −2 in a time period of 7 d ± 1 h. The metallic materials to be joined and the laser welded specimens shall conform to ISO 22674:2016, 5.7. Testing shall be carried out in accordance with 7.4. 4.4.2 Appearance after corrosion exposure Magnified visual comparison prior to and after corrosion testing shall not reveal any visible selective corrosion in the vicinity of the laser weld. Testing shall be carried out in accordance with 7.4. 4.5 Laser welding process Specific information about the laser welding process is given in Annex A. 5 Sampling The metallic filler material and the metallic...
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