1、 SUPPLEMENTAL REPORT ON THE ELEVATED-TEMPERATURE PROPERTIES OF CHROMIUM-MOLYBDENUM STEELS(An Evaluation of 2ACr-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,P
2、a.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 Amer
3、ican Society for Testing and Materials Related ASTM Publications Report on the Elevated-Temperature Properties of Chromium-Molybdenum Steels,DS 6(1953),$4.75 Supplemental Report on the Elevated-Tempera-ture Properties of Chromium-Molyb-denum Steels,DS 6S1(1966),$2.25 Contents Abstract 1 Figs.1-6 3 I
4、ntroduction 9 Yield Strength and Tensile Strength 9 Creep and Rupture Properties 11 Annealed Material Direct Extrapolation 11 Annealed Material Indirect(Parameter)Extrapolation 13 Annealed Material Comparison of Rupture Strengths for Different Evaluation Procedures 13 Normalized-and-Tempered and Que
5、nched-and-Tempered Material 14 Rupture Ductility 15 Creep and Rupture of Weld Metal 15 Acknowledgments 15 References 15 Tables I-XII 17 Figs.7-27 79 REFERENCE:Smith,G.V.,Supplemental Report on the Elevated Temperature Properties of Chromium-Molybdenum Steels(An Evaluation of 2%Cr-lMo Steel),ASM DATA
6、 SERIES.PS 6S2.American Soci-ety for Testing and Materials,1971.ABSTRACT:This report offers evaluations of ele-vated temperature strength properties of 2%Cr-lMo steel in various conditions of heat treatment and for diverse product forms.The data evaluated in-clude test results previously included in
7、 ASTM Data Series DS 6(1953)and DS 6S1(1966),as well as newly generated data gathered by the Metal Pro-perties 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 temper
8、ed 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 secon-dary creep rates of 0.1 and 0.01 percent 1
9、000 hours.The temperature dependencies of these pro-perties 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
10、 stresses,are also included.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 depen
11、dence of important strength properties for a number of grades of prac-tical interest.Figure 6 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 pro-duct form.KEY WORDS:elevated tempe
12、rature,tensile strength,yield strength,creep strength,rupture strength,elongation,reduction of area,alloy steel,mechan-ical properties,data evaluation.DS6S2-EB/Mar.1971Copyright 1971 by ASTM International www.astm.org :|:|:|;|:ETjjt KfJHHtb=:t|=4i|f=l;!:!:!=:EEEi:!:!ii:EElEll-lES=EEEEEE=E=EEEEEE=11
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16、 3:EB:E:_:xii:-JJ T.T:THpHT bi:gi|fc LEoHn T 111 l-U-:xE:.J:i:3:i.:x:.:i;:xB:;|P|-E|-EtEBE-jE-r-fflMBffi!ilJlliii:l:llil:liJI 1W*4fc Figure 1-Effect of temperature on yield strength,tensile strength,creep strength(O.Ol#per 1000 hours)and rupture strength(100,000 hours)of annealed 2 l/k Cr-1 Mo steel in wrought or cast form.Yield and tensile strengths have been adjusted to 30 and 60 ksi at 75 F.Creep and rupture strengths are averages of available data.Figure 2-Effect of temperature on yield stre