Fitting part having excellent resistance to hydrogen induced cracking and manufacturing method for the same

• Main Author: KIM DAE WOO
• Format: Patent
• Language: English; Korean
• Published: 01.07.2021
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PERFORMING OPERATIONS; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; PUNCHING METAL; ROLLING OF METAL; TRANSPORTING; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

A fitting part according to one aspect of the present invention comprise: 0.06 to 0.25 wt% of C; 0.05 to 0.5 wt% of Si; 1.0 to 2.0 wt% of Mn; 0.005 to 0.4 wt% of Al; equal to or less than 0.01 wt% of P; equal to or less than 0.0015 wt% of S; 0.001 to 0.03 wt% of Nb; 0.001 to 0.03 wt% of V; 0.001 to...