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Hitachi Ltd
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Hitachi Ltd
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Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to JP9733879ApriorityCriticalpatent/JPS5623321A/en
Publication of JPS5623321ApublicationCriticalpatent/JPS5623321A/en
PURPOSE: To increase the hydrogen erosion resistance of welded joints by heat treating the weld zone of steel in the range of a fixed temperature after welding the steel.
CONSTITUTION: In order to increase the hydrogen erosion resistance of welded joints of steel which are used under the environment of hydrogen at high temperature and pressure, the weld zone should be heated at least 525W600°C under low partial pressure of hydrogen. Chemical component of steel used for welded joint consists of ≥0.3% C, ≥0.2% Si, 0.3W0.9% Mn, 2W5% Cr, 0.5W1.2% Mo, ≥0.026% total amount of P, Sn, Sb plus As and the remainder of Fe.
COPYRIGHT: (C)1981,JPO&Japio
JP9733879A1979-08-011979-08-01Method for increasing hydrogen erosion resistance of welded joint
PendingJPS5623321A
(en)