Composition-based correlations to predict sensitization resistance of austenitic stainless steel

Conference · Thu Nov 01 04:00:00 EST 1984

OSTI ID:5721292

Bruemmer, S M

Composition-based correlations to predict the relative sensitization resistance of Types 304 and 316 stainless steel (SS) have been evaluated by comparison to a large data base. The best fit to experimental data was achieved using a slightly modified version of Cihal's elemental parameters: Cr* = Cr + 1.6 Mo - 0.2 Ni - 100 C where Cr* is the composite chromium concentration, and all concentrations are expressed as weight percentages. This composite chromium term effectively normalizes the effects of the major alloying elements on sensitization resistance. Attempts to add other alloying elements such as manganese, silicon, and nitrogen to the equation did not improve the correlation to the data base. Quantitative degree-of-sensitization (DOS) measurements were made on 14 heats of types 304 and 316 SS after various isothermal heat treatments using the EPR technique. Comparisons among these heats were found to be consistent with the proposed composite chromium formulism.

• Research Organization: Pacific Northwest Labs., Richland, WA (USA)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 5721292
• Report Number(s): PNL-SA-12718; CONF-850311-13; ON: TI85010306
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION
CORROSION RESISTANT ALLOYS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HEAT TREATMENTS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
STAINLESS STEEL-304
STAINLESS STEEL-316
STAINLESS STEELS
STEELS