_STP_488-1971.pdf

ELEVATED TEMPERATURE TESTING PROBLEM AREAS A symposium presented at the Seventy-third Annual Meeting AMERICAN SOCIETY FOR TESTING AND MATERIALS Toronto,Ontario,Canada,21-26 June 1970 ASTM SPECIAL TECHNICAL PUBLICATION 488 List price$5.50 04-488000-40 jtl AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race Street,PhiladeJphia,Pa.19103 Copyright by ASTM Intl(all rights reserved);Mon Dec 21 11:04:19 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.()BY AMERIC.N SOCIETY FOR TESTING AND IATERIALS 1971 Library o Congress Catalog Card Number:77-16300 NOTE The Society is not responsible,as a body,for the statements and opinions advanced in this publication.Printed in Baltimore,Md.April 1971 Copyright by ASTM Intl(all rights reserved);Mon Dec 21 11:04:19 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Foreword The Symposium on Problem Areas in Elevated Temperature Testing was presented at the Seventy-third Annual Meeting of the American Society for Testing and Materials held in Toronto,Ontario,Canada,21-26 June 1970.The Joint Committee on Effect of Temperature on the Properties of Metals(ASTM-American Society of Mechanical Engineers-Metal Properties Council)sponsored the two-session meeting on 22 June 1970.H.R.Voorhees of the Materials Technology Corp.served as sym-posium chairman;he was assisted by D.K.Faurschou,Canada Department of Energy,Mines and Resources,and G.V.Smith,Cornell University,who acted as session chairmen.Copyright by ASTM Intl(all rights reserved);Mon Dec 21 11:04:19 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Related ASTM Publications Fatigue at High Temperature,STP 459(1969),$11.25 Advanced Testing Techniques,STP 476(1970),$5.75 An Evaluation of the Yield,Tensile,Creep,and Rup-ture Strengths of Wrought 304,316,321,and 347 Stainless Steels at Elevated Temper-ature,DS 5-$2(1969),$6.00 Supplemental Report on Elevated Temperature Prop-ertles of Chromium-Molybdenum Steels,DS 6-$2(1971),$7.00 An Evaluation of the Elevated Temperature Tensile and Creep Rupture Properties of Wrought Carbon Steel,DS 11-SI(1969),$6.00 Copyright by ASTM Intl(all rights reserved);Mon Dec 21 11:04:19 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Contents Introduction 1 Preliminary Report on the AGARD Evaluation of Variables Affecting High Temperature Creep Results-n.COUTSOURADIS ANn D.K.F4URSCHOU 3 Measuring the Apparatus Contribution to Bending in Tension Specimens-44.K.SCHMIEDER 15 Axiality Measurements of Fifty Creep Machines-4.x.SCHMIEDER AND 4.T.HENRY 43 Discussion 61 Apparent Lowering of Creep Rupture Life by Frequent Beam Leveling-H.R.VOORHEES 65 Discussion 69 Interlaboratory Program to Evaluate Present PyrGmetric Practices in Ele-vated Temperature Testing-.L.KORNS 71 Effect of Thermoeouple Drift on Rupture Life at High Temperature-H.R.VOORHEES 79 A Method for Extrapolating Rupture Duetility-s.M.GOLDHOFF 82 Elevated Temperature Tensile Grips for Tubing-M.M.P4XTON 95 Discussion Copyright by ASTM Intl(all rights reserved);Mon Dec 21 11:04:19 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.STP488-EB/Apr.1971 Introduction The need for this symposium became evident during recent efferts to update ASTM Recommended Practices for Short-Time Elevated Temper-ature Tension Tests of Materials and for Conducting Creep and Time-for-Rupture Tension Tests of Materials(E 21:66T and E 139-66T,re-spectively).The Subcommittee on Test Methods of the ASTM-ASME-MPC Joint Committee on Effect of Temperature on the Properties of Metals found,in particular,that available information on alignment and pyrometry was insufficient to permit definition of exact effects on test results.This lack of factual information has necessitated some indefinite provisions in E 21 and E 139,while other requirements represent a com-promise between opinions as to what is desired and what is attained readily in usual practice.Although both are incomplete,an extensive cooperative creep testing program by AGARD(a NATO committee;see first paper by Coutsouradis and Faurschou)and an interlaboratory evaluation of pyrometric practices being conducted by the joint committee have developed preliminary results(see paper by J.L.Korns).Several other smaller studies also are under way to relate to questions being raised about elevated temperature testing procedures.The symposium was organized with the hope of uncovering those data necessary to an evaluation of the effectiveness of existing standards and to make available some useful data that will supplement current standards while suitable revisio