Effects of SO/sub 2/ shielding gas additions on GTA weld shape

Journal Article · Sat Jun 01 00:00:00 EDT 1985 · Weld. J. (Miami); (United States)

OSTI ID:5056659

Heiple, C R; Burgardt, P

Substantial increases in GTA weld depth/width ratio resulted from small additions of sulfur dioxide (SO/sub 2/) to the torch shielding gas when welding two stainless steels. The improvement was demonstrated on both Types 304 and 21-6-9 austenitic stainless steels, but would be expected for iron-base alloys generally. The weld pool shape achieved was essentially independent of variations in both SO/sub 2/ content of the torch gas and base metal composition when SO/sub 2/ in the shielding gas was in the range of 500 to 1400 ppm. With 700 ppm SO/sub 2/ in the torch gas, less than 30 ppm sulfur was added to an autogenous weld bead. For alloys where this additional sulfur can be tolerated and appropriate measures can be taken to handle the toxic SO/sub 2/, this technique offers a promising way to improve GTA weld joint penetration while suppressing variable penetration.

• Research Organization: Rockwell International, Rocky Flats Plant, North American Space Operations, Golden, CO
• OSTI ID: 5056659
• Journal Information: Weld. J. (Miami); (United States), Vol. 64:6
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AUSTENITIC STEELS
SHIELDED METAL-ARC WELDING
STAINLESS STEEL-304
WELDED JOINTS
SHAPE
SULFIDATION
DEPTH
SULFUR DIOXIDE
WIDTH
ALLOYS
ARC WELDING
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
DIMENSIONS
FABRICATION
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
MATERIALS
NICKEL ALLOYS
OXIDES
OXYGEN COMPOUNDS
STAINLESS STEELS
STEELS
SULFUR COMPOUNDS
SULFUR OXIDES
WELDING
360101* - Metals & Alloys- Preparation & Fabrication