Highly alloyed duplex stainless steels
Journal Article
·
· J. Mater. Energy Syst.; (United States)
The corrosion resistance and mechanical properties of thirteen experimental cast duplex stainless steels were evaluated. These 24 pct Cr steels contain 4.5 to 7.5 pct Mo, 7 to 17 pct Ni and 0.2 to 0.4 pct N. The 24Cr-6Mo-9.5Ni-0.25N steel had the best combination of corrosion and mechanical properties. This steel had a critical crevice temperature of 47.5 /sup 0/C (117 /sup 0/F) in 10 pct FeCl/sub 3/ X 6H/sub 2/O solution compared to 12.5 /sup 0/C (55 /sup 0/F) for cast Ferralium alloy 255 and -2.5 /sup 0/C (28 /sup 0/F) for CF-8M. An improvement of corrosion resistance and mechanical properties was observed when the annealing temperature was increased from 1100 /sup 0/C (2010 /sup 0/F) to 1200 /sup 0/C (2190 /sup 0/F). Silicon was found to enhance sigma phase precipitation. Reducing the silicon content to 0.1 pct prevented sigma formation in slowly cooled duplex stainless steels containing 5 pct molybdenum.
- Research Organization:
- AMAX Materials Research Ctr., Ann Arbor, MI
- OSTI ID:
- 6489519
- Journal Information:
- J. Mater. Energy Syst.; (United States), Journal Name: J. Mater. Energy Syst.; (United States) Vol. 7:1; ISSN JMSMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ANNEALING
CHLORIDES
CHLORINE COMPOUNDS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANCE
CORROSION RESISTANT ALLOYS
CORROSIVE EFFECTS
DESTRUCTIVE TESTING
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
HEAT TREATMENTS
HYDROGEN COMPOUNDS
IRON ALLOYS
IRON BASE ALLOYS
IRON CHLORIDES
IRON COMPOUNDS
MATERIALS TESTING
MECHANICAL PROPERTIES
MEDIUM TEMPERATURE
NICKEL ALLOYS
OXYGEN COMPOUNDS
PHASE STUDIES
PRECIPITATION
QUANTITY RATIO
SEMIMETALS
SEPARATION PROCESSES
SILICON
STAINLESS STEELS
STEELS
TESTING
TRANSITION ELEMENT COMPOUNDS
VERY HIGH TEMPERATURE
WATER
360103 -- Metals & Alloys-- Mechanical Properties
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ANNEALING
CHLORIDES
CHLORINE COMPOUNDS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANCE
CORROSION RESISTANT ALLOYS
CORROSIVE EFFECTS
DESTRUCTIVE TESTING
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
HEAT TREATMENTS
HYDROGEN COMPOUNDS
IRON ALLOYS
IRON BASE ALLOYS
IRON CHLORIDES
IRON COMPOUNDS
MATERIALS TESTING
MECHANICAL PROPERTIES
MEDIUM TEMPERATURE
NICKEL ALLOYS
OXYGEN COMPOUNDS
PHASE STUDIES
PRECIPITATION
QUANTITY RATIO
SEMIMETALS
SEPARATION PROCESSES
SILICON
STAINLESS STEELS
STEELS
TESTING
TRANSITION ELEMENT COMPOUNDS
VERY HIGH TEMPERATURE
WATER