Effects of delta ferrite content on the mechanical properties of E308-16 stainless steel weld metal

Conference · Sun Jan 01 00:00:00 EST 1978

OSTI ID:6490738

Edmonds, D. P.; Vandergriff, D. M.; Gray, R. J.

The effects of ferrite content on the properties of type 308 stainless steel shielded metal-arc (SMA) welds were investigated. Welds were made at four levels of ferrite content ranging from 2 to 15 FN (Ferrite Number). Creep and tensile tests were performed. Specimens were aged at 1100/sup 0/C (593/sup 0/C) for times up to 10,000 h (36 Ms) and Charpy V-notch impact tests were performed. Chemical analysis of the original deposits, Magne-gage evaluations, and metallographic evaluation of tested specimens were made. The E308-16 stainless steel electrodes were formulated to produce SMA welds with 2, 5, 9, and 15 FN. The ferrite number was made to vary by varying the nickel and chromium concentrations. Magne-gage determinations revealed that as-welded structures contained an average of 1.8, 4.2, 9.6, and 14.5 FN, respectively. Chemical anslysis of these deposits revealed no unusually high concentrations of tramp elements that would significantly affect mechanical properties. The extra low-ferrite electrodes were made with a different core wire, which produced deposits with slightly higher molybdenum concentrations. This variation in molybdenum should affect properties only minimally. From these chemical analyses and a constitutional diagram, ferrite concentrations were calculated, and the results correlated with the Magne-gage values

• Research Organization: Oak Ridge National Lab., TN (USA); Combustion Engineering, Inc., Chattanooga, TN (USA)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6490738
• Report Number(s): CONF-781202-34; TRN: 79-006924
• Resource Relation: Conference: ASME meeting, San Francisco, CA, USA, 10 Dec 1978
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
STAINLESS STEEL-308
CRYSTAL-PHASE TRANSFORMATIONS
MECHANICAL PROPERTIES
AGING
CARBIDES
CHARPY TEST
CHEMICAL COMPOSITION
CRACKS
CREEP
ELECTRODES
FERRITES
FILLER METALS
PRECIPITATION
RUPTURES
TEMPERATURE EFFECTS
WELDING
ALLOYS
CARBON COMPOUNDS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
FABRICATION
FAILURES
FERRIMAGNETIC MATERIALS
IRON ALLOYS
IRON BASE ALLOYS
IRON COMPOUNDS
JOINING
MAGNETIC MATERIALS
NICKEL ALLOYS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
SEPARATION PROCESSES
STAINLESS STEELS
STEELS
TRANSITION ELEMENT COMPOUNDS
360103* - Metals & Alloys- Mechanical Properties
360102 - Metals & Alloys- Structure & Phase Studies