Cryogenic toughness of SMA austenitic stainless steel weld metals. II - Role of nitrogen
Experiments on the effects of nitrogen content on the toughness of austenitic stainless steel weld metals type 316L-15 and type 16-8-2-15 at cryogenic temperatures are presented. A lesser number of tests was also made using type 308-16 stainless steel electrodes. Charpy V-notch (CVN) specimens were used to determine CVN impact energy and lateral expansion at -200 F (-129 C), -250 F (-157 C) and -320 F (-196 C), using electrodes covered with either lime-type or titania-type coverings. Results are presented on the variation of lateral expansion and impact energy with temperature, ferrite number and nitrogen content. Regression analysis was used to calculate model equations in order to determine the effects of various constituent concentrations on weld metal toughness. It is concluded that within any grade, optimum properties may be achieved if the weld metal is low in ferrite, nitrogen (less than 0.05%) and carbon (less than 0.04%), as high as possible in nickel, and is deposited by a lime-type electrode.
- Research Organization:
- Teledyne McKay, York, Pa.
- OSTI ID:
- 5884389
- Journal Information:
- Weld. Res. (Miami); (United States), Vol. 58; Conference: 59. annual meeting of American Welding Society, New Orleans, LA, USA, 3 Apr 1978
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AUSTENITIC STEELS
CHARPY TEST
FRACTURE PROPERTIES
STAINLESS STEELS
CARBON
CRYOGENICS
FERRITES
NITROGEN
REGRESSION ANALYSIS
ALLOYS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
DESTRUCTIVE TESTING
ELEMENTS
FERRIMAGNETIC MATERIALS
IMPACT TESTS
IRON ALLOYS
IRON BASE ALLOYS
IRON COMPOUNDS
MAGNETIC MATERIALS
MATERIALS
MATERIALS TESTING
MATHEMATICS
MECHANICAL PROPERTIES
MECHANICAL TESTS
NONMETALS
OXYGEN COMPOUNDS
STATISTICS
STEELS
TESTING
TRANSITION ELEMENT COMPOUNDS
360103* - Metals & Alloys- Mechanical Properties