ASME STP-PT-025-2009 EXTENDED FATIGUE EXEMPTION RULES FOR LOW CR ALLOYS INTO THE TIME-DEPENDENT RANGE FOR SECTION VIII DIV 2《VIII部分第2区用在时间附属区的低铬合金延长疲劳去除的规则》.pdf
《ASME STP-PT-025-2009 EXTENDED FATIGUE EXEMPTION RULES FOR LOW CR ALLOYS INTO THE TIME-DEPENDENT RANGE FOR SECTION VIII DIV 2《VIII部分第2区用在时间附属区的低铬合金延长疲劳去除的规则》.pdf》由会员分享,可在线阅读,更多相关《ASME STP-PT-025-2009 EXTENDED FATIGUE EXEMPTION RULES FOR LOW CR ALLOYS INTO THE TIME-DEPENDENT RANGE FOR SECTION VIII DIV 2《VIII部分第2区用在时间附属区的低铬合金延长疲劳去除的规则》.pdf(65页珍藏版)》请在麦多课文档分享上搜索。
1、Designator: Meta Bold 24/26Revision Note: Meta Black 14/16STP-PT-025EXTENDED FATIGUE EXEMPTION RULES FORLOW CR ALLOYS INTO THETIME-DEPENDENT RANGEFOR SECTION VIII DIV 2STP-PT-025 EXTEND FATIGUE EXEMPTION RULES FOR LOW CR ALLOYS INTO THE TIME-DEPENDENT RANGE FOR SECTION VIII DIV 2 CONSTRUCTION Prepar
2、ed by: Charles Becht IV, PhD, PE Charles Becht V Becht Engineering Company Date of Issuance: January 29, 2009 This report was prepared as an account of work sponsored by ASME Pressure Technologies Codes and Standards and the ASME Standards Technology, LLC (ASME ST-LLC). Neither ASME, ASME ST-LLC, th
3、e authors, nor others involved in the preparation or review of this report, nor any of their respective employees, members, or persons acting on their behalf, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any
4、 information, apparatus, product, or process disclosed, or represents that its use would not infringe upon privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply it
5、s endorsement, recommendation, or favoring by ASME ST-LLC or others involved in the preparation or review of this report, or any agency thereof. The views and opinions of the authors, contributors, reviewers of the report expressed herein do not necessarily reflect those of ASME ST-LLC or others inv
6、olved in the preparation or review of this report, or any agency thereof. ASME ST-LLC does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in this document, and does not undertake to insure anyone utilizing a publication against
7、 liability for infringement of any applicable Letters Patent, nor assumes any such liability. Users of a publication are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility. Participation by
8、 federal agency representative(s) or person(s) affiliated with industry is not to be interpreted as government or industry endorsement of this publication. ASME is the registered trademark of the American Society of Mechanical Engineers. No part of this document may be reproduced in any form, in an
9、electronic retrieval system or otherwise, without the prior written permission of the publisher. ASME Standards Technology, LLC Three Park Avenue, New York, NY 10016-5990 ISBN No. 978-0-7918-3190-8 Copyright 2009 by ASME Standards Technology, LLC All Rights Reserved Extend Fatigue Exemption Rules fo
10、r Low Cr Alloys into the Time-Dependent Range STP-PT-025 iii TABLE OF CONTENTS Foreword v Abstract . vi 1 BACKGROUND . 1 2 SHAKEDOWN CONCEPTS 4 3 STRAIN RANGE FOR SHAKEDOWN AND INITIAL STRESS 8 4 CREEP FATIGUE WITH SHAKEDOWN TO ELASTIC ACTION . 9 5 DEMONSTRATION OF SHAKEDOWN 11 6 INTERMEDIATE CYCLES
11、 . 12 7 LOW CYCLE EXEMPTION 14 8 CONCLUSION 16 References 17 Appendix A - Relaxation/Damage Accumulation Curves . 19 Appendix B - Cyclic Fatigue Data and Charts . 22 Appendix C - Gr 22 Data Tables 32 Appendix D - Gr 91 Data Points 43 Acknowledgments 57 LIST OF TABLES Table 1 - Relaxation/Damage Accu
12、mulation Data for Various Chrome Alloys 8 LIST OF FIGURES Figure 1 Strain Range vs. Cycles to Failure 2 Figure 2 Stress-Strain Behavior Illustrating Shakedown 5 Figure 3 Stress-Strain Behavior Illustrating Elevated Temperature Shakedown 5 Figure 4 Cyclic Stress History with Shakedown. 6 Figure 5 Cyc
13、lic Stress History Without Shakedown. 6 Figure 6 Stress-Strain Behavior with Reset to Allowable Stress 7 Figure 7 Cyclic Stress History with Reset to Allowable Stress 7 Figure 8 - Relaxation/Damage Accumulation Curves for 1.25Cr-0.5Mo-Class 1 Material. 9 Figure 9 - Creep-Fatigue Interaction Diagram
14、. 10 Figure 10 Stress Strain Behavior with Stress Reset Caused by Relaxation at Second Operating Condition 12 Figure 11 Stress-Time Behavior with Stress Reset Caused by Relaxation at Second Operating Condition 13 Figure 12 - Nozzle Subjected to Internal Pressure with High Peak Stress at the Acute Co
15、rner 10. 14 STP-PT-025 Extend Fatigue Exemption Rules for Low Cr Alloys into the Time-Dependent Range iv Figure 13 - Stress, Plastic and Creep Strain, Strain Limit Ratio and Damage After 10 Cycles with 2 Year Hold Time 1014 Figure 14 - 9Cr-1Mo-V 900F19 Figure 15 - 2.25Cr-1Mo-V 900F.19 Figure 16 - 2.
16、25Cr-1Mo Class 2 900F 20 Figure 17 - 2.25Cr-1Mo Class 1 900F 20 Figure 18 - 1.25Cr-0.5Mo-Si Class 2 900F.21 Figure 19 - 1.25Cr-0.5Mo-Si Class 1 900F.21 Figure 20 - 1.25Cr-0.5Mo-Si-Class 2 Data Point Plotted Versus SCMV 3 Material (45/75 grade bainitic) which has Exhibited Similar Behavior to 1.25Cr
17、Alloys.12 .23 Figure 21 - 1.25Cr-0.5Mo-Si-Class 2 Data Point Plotted Versus Various Alloys with Similar Behavior to 1.25Cr Alloys.13.23 Figure 22 - 2.25Cr-1Mo Class 1 Data Point Plotted Versus 2.25Cr-1Mo Steel Whose Heat Treatment was Normalization and Tempering Followed by Stress Relief Annealing.1
18、4 24 Figure 23 - 2.25Cr-1Mo Class 1 Data Point Plotted Versus Fatigue Data for Annealed 2.25Cr-1Mo Steel. Note that this data does not appear to match any of the other data compiled during this investigation.15 25 Figure 24 - 2.25Cr-1Mo Class 2 Data Point Plotted Versus Fatigue Data for PWHT and QT
19、(both bainitic) 2.25Cr-1Mo Steel.1525 Figure 25 - 2.25Cr-1Mo Class 2 Data Point Plotted Versus Fatigue Data for 2.25Cr-1Mo Steel Class 2.16 .26 Figure 26 - 2.25Cr-1Mo Class 2 Data Point Plotted Versus Fatigue Data for 2.25Cr-1Mo Steel Class 2, Note HAZ stands for heat affected zone.1626 Figure 27 -
20、2.25Cr-1Mo Class 2 Data Point Plotted Versus Fatigue Data for Normalized and Tempered 2.25Cr-1Mo Steel.17.27 Figure 28 - 2.25Cr-1Mo Class 2 Data Point Plotted Versus Fatigue Data for Normalized and Tempered 2.25Cr-1Mo Steel.18.27 Figure 29 - 2.25Cr-1Mo Class 2 Data Point Plotted Versus Fatigue Data
21、for Normalized and Tempered 2.25Cr-1Mo Steel.19.28 Figure 30 - 2.25Cr-1Mo-V Data Point Plotted Versus Fatigue Data for 2.25Cr-1Mo-V Steel.20.28 Figure 31 9Cr-1Mo-V Data Point Plotted Versus Fatigue Data for 9Cr-1Mo-V Steel. See App. D 29 Figure 32 - 9Cr-1Mo-V Data Point Plotted Versus Fatigue Data f
22、or 9Cr-1Mo-V Steel. See App. D 29 Figure 33 - 9Cr-1Mo-V Data Point Plotted Versus Fatigue Data for 9Cr-1Mo-V Steel.21.30 Figure 34 - 9Cr-1Mo-V Data Point Plotted Versus Fatigue Data for 9Cr-1Mo-V Steel.21.30 Figure 35 - 9Cr-1Mo-V Data Point Plotted Versus Fatigue Data for 9Cr-1Mo-V Steel. See App. D
23、 31 Extend Fatigue Exemption Rules for Low Cr Alloys into the Time-Dependent Range STP-PT-025 v FOREWORD This document was developed under a research and development project which resulted from ASME Pressure Technology Codes the design temperature is for pressure design. 2. In fatigue design per Sec
24、tion VIII, Div 2, operating conditions, not design conditions, are considered. 3. In primary plus secondary stress range limits in Section VIII, Div 2, operating conditions, not design conditions, are considered. While design conditions are used in pressure design, expected operating conditions shou
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