ASTM_DS59-1980.pdf

EVALUATIONS OF THE ELEVATED TEMPERATURE TENSILE AND CREEP RUPTURE PROPERTIES OF 12 TO 27 PERCENT CHROMIUM STEELS Prepared for the METALS PROPERTIES COUNCIL by G.V.Smith ASTM DATA SERIES PUBLICATION DS 59 05-059000-40 AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race Street,Philadelphia,Pa.19103 Copyright by AMERICAN SOCIETY FOR TESTING AND MATERIALS 1980 Library of Congress Catalog Card Number:80-67396 NOTE The Society is not responsible,as a body,for the statements and opinions advanced in this publication.Printed in Easton,Maryland August 1980 Data Series DS 59 American Society for Testing and Materials Related ASTM Publications Properties of Austenitic Stainless Steels and Their Weld Metals(Influence of Slight Chemistry Variations),STP 679(1979),$13.50,04-679000-02 Elevated Temperature Testing Problem Areas,STP 488(1971),$5.50,04-0488000-40 Supplemental Report on the Elevated-Temperature Properties of Chromium-Molyb-denum Steels,DS 6-S2(1971),$7.00,05-006002-40 Supplemental Report on the Elevated-Temperature Properties of Chromium-Molyb-denum Steels,DS 6-S1(1966),$2.25,05-006001-40 Report on the Elevated-Temperature Properties of Selected Superalloys,DS 7-S1(1968),$11.00,05-007001-40 Chemical Compositions and Rupture Strengths of Superalloys,DS 9E(1970),$3.50,05-009050-20 Contents Abstract 1 Introduction 2 Yield and Tensile Strength Evaluation Procedures 2 Creep and Rupture Strength Evaluation Procedures 2 Summary 6 Acknowledgments 7 References 7 Tables I-X 8 Figures 1-25 131 REFERENCE:Smith,G.V.,Evaluations of the Ele-vated Temperature Tensile and Creep-Rupture Prop-erties of 12 to 27 Percent Chromium Steels;ASTM Data Series DS 59.American Society for Testing and Materials,1980.KEY WORDS:elevated temperature,tensile strength,yield strength,creep strength,rup-ture strength,elongation,reduction of area,ferritlc chromium steels,time-temperature para-meter,mechanical properties,data evaluation.ABSTRACT:Evaluations of the static elevated temperature strength properties of some 25 fer-fous alloys containing about 12 to 27 percent chromium(Cr)are reported.The principal ob-jective of the evaluations was to develop best estimates for the temperature variation of the basic properties-yield,tensile,rupture and creep strengths-that are required for establishing allowable stresses for the power generation and process industries.Creep and rupture data were not available for a number of the grades and,therefore,could not be evaluated,and similarly,for several grades,it was not possible to evaluate yield and tensile strengths.For grades for which data were available,the number and character of the data differed widely.Thus,the confidence that can be placed in the results differs from grade to grade,and the results should be used with differing degrees of caution appropriate to the individual grades.DS59-EB/Aug.1980Copyright 1980 by ASTM International www.astm.org INTRODUCTION Evaluations are reported herein for some 25 steels or groups of steels,containing about 12 to 27 Cr,many of which also contain other alloy-ing elements.The 25 specific parts are identi-fied in Table 1 by grade designation and/or nom-inal composition.The report of these evaluations represents still another in a series of similar reports prepared under the sponsorship of the Metal Properties Council(MPC),intended to pro-vide engineering design information in a form readily usable for establishing allowable working stresses for the power generation and process in-dustries.The raw data that have been evaluated include hitherto unpublished data gathered by MPC from cooperating industrial organizations(including some made available to the ASME Boiler and Pres-sure Vessel Committees for establishing allowable stresses),as well as data previously published in ASTMs Data Series Publications.Data sources are identified in the list of references.All of the data evaluated are identified in Tables I and II as to specification number and alloy grade or type,heat treatment,product form and size,grain size,and chemical composition,insofar as those had been reported.The properties that have been evaluated in-clude yield and tensile strengths,as measured in conventional short time tensile tests,at room and elevated temperatures,and creep and rupture strengths.Creep strength has been evaluated at two levels,specifically as the stresses causing secondary creep rates of 0.1 percent and 0.01 per-cent per 1000 hours.Rupture strength has been evaluated as the stress for rupture in 1000,10,000 and 100,000 hours.In all instances,the strength evaluations have been developed in the form of trend curves defining the variation of strength with temperature,and therefore directly useful for establishing allowable design stresses.The ductility properties,percent elongation and percent reduction of area at fracture,are included in the tables,when reported,and have been plotted in summary figures to illustrate trends of behavior.Whereas in previous reports in this series,the te