SUPPLEMENTAL REPORT ON THE ELEVATED-TEMPERATURE PROPERTIES OF CHROMIUM-MOLYBDENUM STEELS (An Evaluation of 2'ACr-lMo Steel) Prepared for the METAL PROPERTIES COUNCIL by G V Smith ASTM DATA SERIES PUBLICATION DS 6S2 05-40006-002 AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race Street, Philadelphia, Pa 19103 © BY AMERICAN SOCIETY FOR TESTING AND MATERIALS 1971 Library of Congress Catalog Card Number: 66-24784 ISBN 0-8031-2010-9 NOTE The Society is not responsible, as a body, for the statements and opinions advanced in this publication Printed in Alpha, New Jersey March 1971 Data Series DS 6S2 The American Society for Testing and Materials Related ASTM Publications Report on the Elevated-Temperature Properties of Chromium-Molybdenum Steels, DS (1953), $4.75 Supplemental Report on the Elevated-Temperature Properties of Chromium-Molybdenum Steels, DS 6S1 (1966), $2.25 Contents Abstract Figs 1-6 Introduction Yield Strength and Tensile Strength Creep and Rupture Properties 11 Annealed Material — Direct Extrapolation 11 Annealed Material — Indirect (Parameter) Extrapolation Annealed Material — Comparison of Rupture Strengths 13 for Different Evaluation Procedures 13 Normalized-and-Tempered and Quenched-and-Tempered Material 14 Rupture Ductility 15 Creep and Rupture of Weld Metal 15 Acknowledgments 15 References 15 Tables I - XII 17 Figs - 27 79 DS6S2-EB/Mar 1971 REFERENCE: Smith, G V., "Supplemental Report on the Elevated Temperature Properties of ChromiumMolybdenum Steels (An Evaluation of 2%Cr-lMo Steel)," ASM DATA SERIES PS 6S2 American Society for Testing and Materials, 1971 ABSTRACT: This report offers evaluations of elevated temperature strength properties of 2%Cr-lMo steel in various conditions of heat treatment and for diverse product forms The data evaluated include test results previously included in ASTM Data Series DS (1953) and DS 6S1 (1966), as well as newly generated data gathered by the Metal Properties Council The data for wrought material are separated into a number of strength categories corresponding to current specifications for annealed, normalized and tempered, and quenched and tempered grades Data for castings and for weld-metal are evaluated separately Rupture strength and creep strength have been evaluated at two levels, respectively, as the stresses to cause rupture in 10,000 or 100,000 hours and as the stresses corresponding to secondary creep rates of 0.1 and 0.01 percent 1000 hours The temperature dependencies of these properties as well as of yield strength (0.2 percent offset) and tensile strength are developed in such a form as to be useful for establishing allowable working stresses Elongation and reduction of area data, although not of direct usefulness in setting stresses, are also included Copyright © 1971 by ASTM International The body of the report provides in tables,text, and figures, details concerning the indentification of the individual lots of material, the evaluation procedures, and the results.Several summary figures immediately following this abstract, Figs 1-5, depict the temperature dependence of important strength properties for a number of grades of practical interest Figure provides a comparison of the temperature dependence of yield and tensile strength, expressed in the form of strength ratios, for several conditions of heat treatment and product form KEY WORDS: elevated temperature, tensile strength, yield strength, creep strength, rupture strength, elongation, reduction of area, alloy steel, mechanical properties, data evaluation www.astm.org E^T^j^jt^ •KfJH'Htb =[:t^^|=4i| '^ f=l£ ::::::::::::::: ::::±:::::::::::::|:::||:|;±|: ;!!:!:!!!!!!!=::EEEi:!!!:!'ii::EElE^ll-lES= ~EE=ii- EEEE£EE==E^=EE±EEEE=11 E^p==E ± E=1=El E^=EE E E£ EE1=1 ± E^=±==1EE E^S EE EJ H:::::::±::::::::::i:::::::::::::i:::Ii:x:5|: >*EEEEEE:::EEEEEEEEEE|EEEEEEEEE|EE|EEEi±E|EEjEJ|: ^}j$J • EEEEEEEEEEEEEEEEEEElEEEEEEEEEEEEEEEEEEEEfEEjEEEfH:: w:::::::::::::::::::|:::::::::::::|:::||:|:ffl: w::::: ::::::::::::::£:::: ::::::::: + :::±±: + :±tt: g::;;;:;;;;;;::::;;;|;;;::|;;;;;|;;|;|;|: gn ::::::::::::::::::: + ::::::::::::: + ::: + J:|:»! 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