The nitrogen effect on Type 304L austenitic stainless steel weld metal welded with a GTA (Gas Tungsten Arc) system under ambient and hyperbaric conditions

Technical Report · Sun Jan 01 04:00:00 EST 1984

OSTI ID:5419684

Okagawa, R K

Small amounts of nitrogen were injected into Type 304L austenitic stainless steel weld metal. This was accomplished by using an Ar-N/sub 2/ shield gas mixture in combination with a controlled argon atmosphere on autogeneous Gas Tungsten Arc (GTA) welds. Weld metal nitrogen as a function of nitrogen shield gas content and applied pressure was examined. Nitrogen shield gas contents above 4% were found to have a major effect on the weld metal microstructure. The base metal nitrogen did not influence the nitrogen solubility reaction or solidification behavior during welding. For Type 304L austenitic stainless steel, a nitrogen coefficient of 13.4 was determined for the nickel equivalent expression. 63 refs., 19 figs., 4 tabs.

• Research Organization: Rockwell International Corp., Golden, CO (USA). Rocky Flats Plant
• DOE Contract Number: AC04-76DP03533
• OSTI ID: 5419684
• Report Number(s): RFP-4202; ON: DE88006489
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
ARC WELDING
ARGON
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CRYSTAL STRUCTURE
ELEMENTS
FABRICATION
FLUIDS
GAS TUNGSTEN-ARC WELDING
GASES
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
MATERIALS
MICROSTRUCTURE
NICKEL ALLOYS
NITROGEN
NITROGEN ADDITIONS
NONMETALS
RARE GASES
STAINLESS STEEL-304
STAINLESS STEELS
STEELS
WELDED JOINTS
WELDING