A Study on Standard of Size of Fillet Weld

According to the specification for Highway Bridges, the minimum weld size is determined so that the leg length, S, satisfies the condition of S>=√2t, where t is the thickness of a plate. However, when the thickness exceeds 40mm this standard requires the S value larger than the maximum of one pas...

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Published inQUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY Vol. 23; no. 3; pp. 422 - 430
Main Authors MINAMI, Kuniaki, KASUYA, Tadashi, MIKI, Chitoshi
Format Journal Article
LanguageJapanese
Published JAPAN WELDING SOCIETY 01.08.2005
Subjects
hydrogen
minimum welding size
PCM
weld crack
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Abstract According to the specification for Highway Bridges, the minimum weld size is determined so that the leg length, S, satisfies the condition of S>=√2t, where t is the thickness of a plate. However, when the thickness exceeds 40mm this standard requires the S value larger than the maximum of one pass welding, which could lead to the decrease of the welding execution efficiency. Why this standard regulates the weld size is to avoid cold cracking by escaping the rapid cooling. But escaping the rapid cooling is not the only method to avoid cold cracking. In this study, we examine the cold cracking susceptibility and the HAZ hardness distributions of the fillet welds using 50mm thick plates whose PCM ranges from 0.21% to 0.27%. We also carry out the heat conduction analysis to evaluate the effect of the test piece size. Using the present results, we discuss the validity of the today's standard of the √2t regulation.
AbstractList According to the specification for Highway Bridges, the minimum weld size is determined so that the leg length, S, satisfies the condition of S > or = root 2t, where t is the thickness of a plate. However, when the thickness exceeds 40mm this standard requires the S value larger than the maximum of one pass welding, which could lead to the decrease of the welding execution efficiency. Why this standard regulates the weld size is to avoid cold cracking by escaping the rapid cooling. But escaping the rapid cooling is not the only method to avoid cold cracking. In this study, we examine the cold cracking susceptibility and the HAZ hardness distributions of the fillet welds using 50mm thick plates whose PCM ranges from 0.21% to 0.27%. We also carry out the heat conduction analysis to evaluate the effect of the test piece size. Using the present results, we discuss the validity of the today's standard of the root 2t regulation. [Material: steel].
According to the specification for Highway Bridges, the minimum weld size is determined so that the leg length, S, satisfies the condition of S>=√2t, where t is the thickness of a plate. However, when the thickness exceeds 40mm this standard requires the S value larger than the maximum of one pass welding, which could lead to the decrease of the welding execution efficiency. Why this standard regulates the weld size is to avoid cold cracking by escaping the rapid cooling. But escaping the rapid cooling is not the only method to avoid cold cracking. In this study, we examine the cold cracking susceptibility and the HAZ hardness distributions of the fillet welds using 50mm thick plates whose PCM ranges from 0.21% to 0.27%. We also carry out the heat conduction analysis to evaluate the effect of the test piece size. Using the present results, we discuss the validity of the today's standard of the √2t regulation.
Author KASUYA, Tadashi
MINAMI, Kuniaki
MIKI, Chitoshi
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1) 日本道路協会：道路橋示方書・同解説(鋼橋編), 2002.3.
15) K. Minami, J.Tamura, T.Kasuya, T.Nose, C.Miki: A Study on the Standard of Fillet welding size (Part.2), The proceeding of the 58th JSCE Annual Meeting(2003), 151-152, (in Japanese
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Snippet According to the specification for Highway Bridges, the minimum weld size is determined so that the leg length, S, satisfies the condition of S>=√2t, where t...
According to the specification for Highway Bridges, the minimum weld size is determined so that the leg length, S, satisfies the condition of S > or = root 2t,...
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SubjectTerms hydrogen
minimum welding size
PCM
weld crack
Title A Study on Standard of Size of Fillet Weld
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