Arcelormittal Wrc Bulletin Intro
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Contact Ken Orie at 610-383-2587 Mittal Steel USA Technical Report ABSTRACT The Effect of PWHT on Normalized Base-Metal Properties of ASTM A516 Steel WRC Bulletin 481 (ISSN 0043-2326, May 2003) details the investigations conducted by Mittal Steel USA (formerly ISG Plate) into the behavior of ASTM A516 Grade 70 steel plate subjected to post-weld heat treatment (PWHT). The results and conclusions described therein were offered to the Pressure Vessel Research Council (PVRC) and specifically the Committee on Thermal and Mechanical Effects on Materials (TME) to complement the studies the council had commissioned as Part 2 of this bulletin. Those studies were initiated to characterize the effects of PWHT on hardness and notch toughness of welded joints, and, while they contained some base-metal data, it was limited and thus unable to establish any trends, especially pertaining to any parametric analysis. Earlier work performed by Mittal Steel USA as Lukens Steel, and later Bethlehem-Lukens Plate, and ISG Plate, demonstrated a well-defined correlation between base-metal strength, toughness and time- temperature relationships. This is summarized in Part 1 of the bulletin along with additional investigations conducted in an attempt to improve normalized base-metal toughness and improve internal guidelines for predicting properties of post-weld heat treated material conforming to ASTM A516 Grade 70. These new data reinforce previous conclusions that PWHT has a detrimental and predictable effect on base-metal properties that needs to be considered when evaluating the application of PWHT. Additional information along with some of the original data that formed the basis for this study can be found in our literature on pressure vessel steels at http://www.arcelormittal.com . WRC Bulletin 481 is now available from The Welding Research Council by visiting the Welding Research Council’s website at: http://www.forengineers.org/store.php . The Effects of PWHT on Impact Properties of A516 The Effects of PWHT on Impact Properties of A516 LMP vs. % of Original Energy @ LMP vs. % of Original Energy @ -50 50 o F 0 20 40 60 80 100 30 32 33 34 35 36 Larson-Miller Parameter % of Original Ft-lbs 1125F 1125F- 2 hrs 2 hrs 1175F 1175F- 8 hrs 8 hrs Results of 1 Results of 1-1/2” plate 1/2” plate As Norm As Norm Kenneth E. Orie Charles R. Roper Senior Metallurgical Engineer Senior Metallurgical Engineer Customer Technical Service Research Mittal Steel USA - Plate Mittal Steel USA - Plate Coatesville, PA Coatesville, PA
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Arcelormittal Wrc Bulletin Intro
Transcript of Arcelormittal Wrc Bulletin Intro
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Contact Ken Orie at 610-383-2587
Mittal Steel USA Technical Report
ABSTRACT
The Effect of PWHT on Normalized Base-Metal Properties of ASTM A516 Steel
WRC Bulletin 481 (ISSN 0043-2326, May 2003) details the investigations conducted by Mittal Steel USA (formerly ISG Plate) into the behavior of ASTM A516 Grade 70 steel plate subjected to post-weld heat treatment (PWHT). The results and conclusions described therein were offered to the Pressure Vessel Research Council (PVRC) and specifically the Committee on Thermal and Mechanical Effects on Materials (TME) to complement the studies the council had commissioned as Part 2 of this bulletin. Those studies were initiated to characterize the effects of PWHT on hardness and notch toughness of welded joints, and, while they contained some base-metal data, it was limited and thus unable to establish any trends, especially pertaining to any parametric analysis. Earlier work performed by Mittal Steel USA as Lukens Steel, and later Bethlehem-Lukens Plate, and ISG Plate, demonstrated a well-defined correlation between base-metal strength, toughness and time-temperature relationships. This is summarized in Part 1 of the bulletin along with additional investigations conducted in an attempt to improve normalized base-metal toughness and improve internal guidelines for predicting properties of post-weld heat treated material conforming to ASTM A516 Grade 70. These new data reinforce previous conclusions that PWHT has a detrimental and predictable effect on base-metal properties that needs to be considered when evaluating the application of PWHT. Additional information along with some of the original data that formed the basis for this study can be found in our literature on pressure vessel steels at http://www.arcelormittal.com. WRC Bulletin 481 is now available from The Welding Research Council by visiting the Welding Research Councils website at: http://www.forengineers.org/store.php.
The Effects of PWHT on Impact Properties of A516The Effects of PWHT on Impact Properties of A516
LMP vs. % of Original Energy @ LMP vs. % of Original Energy @ --5050ooFF
0
20
40
60
80
100
30 31 32 33 34 35 36
Larson-Miller Parameter
% o
f Ori
gin
al F
t-lb
s
1125F1125F-- 2 hrs2 hrs 1175F1175F-- 8 hrs8 hrs
Results of 1Results of 1--1/2 plate1/2 plate
As NormAs Norm
Kenneth E. Orie Charles R. Roper Senior Metallurgical Engineer Senior Metallurgical Engineer Customer Technical Service Research Mittal Steel USA - Plate Mittal Steel USA - Plate Coatesville, PA Coatesville, PA
