BS ISO 4991:2015 pdf download – Steel castings for pressure purposes

BS ISO 4991:2015 pdf download – Steel castings for pressure purposes This International Standard covers steel castings for pressure containing parts. lt includes materials which are used for the manufacture of components subject to pressure vesselcodes and components not subject to codes. This International Standard relates to castings manufactured from unalloyed and alloyed steel grades(characterized by their chemical composition, Table 1, and mechanical properties,Tables 2, 3,4 and 5).NOTE Annex D gives information on ISo grade designation and available UNS numbers which are similar tothe lS0 grade designation. 2Normative references The following documents, in whole or in part, are normatively referenced in this document and areindispensable for its application.For dated references,only the edition cited applies. For undatedreferences, the latest edition of the referenced document (including any amendments) applies. ISO 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method ISO 4885, Ferrous products — Heat treatments — Vocabulary ISO 4990, Steel castings —General technical delivery requirements IS0 6892-1,Metallic materials —Tensile testing — Part 1: Method of test at room temperatureIS0 6892-2,Metallic materials —Tensile testing —Part 2: Method of test at elevated temperatureIS0 11970, Specification and approval of welding procedures for production welding of steel castingsISO 13520, Determination of ferrite content in austenitic stainless steel castings 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 4885 and IS0 4990 apply. 4Information to be supplied by the purchaser Materials specified in this International Standard shall conform to the applicable requirements ofISO 4990 including the supplementary requirements listed inAnnex A that are indicated in the enquiryand purchase order. 5Heat treatment The type of heat treatment shall comply with Table 6 for the specified grades.The temperatures givenare for information only. When a grade may be delivered at different strength levels depending on the type of heat treatment (seeTable 2) the purchaser shall state at the time of enquiry and order the type of heat treatment required.The symbols for the type of heat treatment are as follows: +N normalized +QT quenched and tempered +AT solution annealed NOTE For definitions, see ISO 4885. 6 Welding Welding is permitted, unless otherwise agreed. All the welds shall conform to the same criteria for non-destructive testing as the relevant part of the casting. Welding shall be carried out in accordance with ISO 11970. The welding conditions are given in Annex B. 7 Requirements 7.1 Chemical composition An analysis of...