2605/3 International Standard (TSO INTE RNATIONAL ORGANIZATION FOR STANDARDIZATION MEKAYHAPOAHAR OPrAHV3AMA nO CTAHAAPTW3AUWWGORGANISATION INTE RNATIONALE DE NORMALISATION Steel products for pressure purposes - Derivation and verification of elevated temperature properties Part 3: An alternative procedure for deriving the elevated temperature yield or proof stress properties when data are limited Produits en acier pour recipients a pression - Derivation et verification des valeurs a temperature eélevee - Partie 3: Autre methode de derivation des valeurs de limites apparente et conventionnelle d'élasticite a temperature élevee a partir de donnees reduites First edition - 1985-12-15 ISO 2605/3-1985 (E) UDC 669.14.018.4 : 620.171.251.222 Ref. No. ISO 2605/3-1985 (E) Descriptors : . steel products, pressure vessels, tests, high temperature tests, verification, elastic limit. Price based on 3 pages Copyright International Organization for Standardization Not for Resale Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through Iso technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 2605/3 was prepared by Technical Committee ISO/TC 17 Steel. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated. ? International Organization for Standardization, 1985 Printed in Switzerland Copyright International Organization for Standardization Notfor Res INTERNATIONAL STANDARD ISO 2605/3-1985 (E) Steel products for pressure purposes - Derivation and verification of elevated temperature properties Part 3: An alternative procedure for deriving the elevated temperature yield or proof stress properties when data are limited 0 Introduction It does not define a verification procedure; where verification of elevated temperature properties is required this shall be by hot testing until the requirements of IS0 2605/1 and IS0 2605/2 In the iso rules for the construction of stationary boilers 1) can be satisfied. (IS0/R 831) minimum lower yield stress, ReL, or proof stress, Rp, at elevated temperature is listed as one of the design criteria. Accordingly, International Standards for pressure vessel steels or national standards conforming to the above 2 References ruies should specify lower yield stress or proof stress properties at elevated temperatures. (See note 1.) Mechanical testing of steel at elevated ISO/R783, temperatures --- Determination of lower yield stress and proof For such International Standards, these values are derived stress and proving test. statistically from a body of data by using the procedures given in ISO 2605/1 and ISO 2605/2. This statistical derivation may IsO/R831,Rulesforconstructionofstationaryboilers. also be used for national standards. However, the data re- quirements of ISO 2605/1 and IS0 2605/2 have frequently Iso 2605, Steel products for pressure purposes --- Derivation proved difficult to achieve in the case of international Stan- and verification of elevated temperature properties dards and may prove to be impossible to meet in the case of Part 1: Yield or proof stress of carbon and low alloy steel national standards or newly developed steels, and this alter- products. native procedure provides a means by which minimum proper- ties may be