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

Journal Article · Wed Jan 01 04:00:00 EST 1986 · Corrosion (Houston); (United States)

DOI:https://doi.org/10.5006/1.3584876· OSTI ID:5685502

Bruemmer, S M

Composition-based correlations to predict the relative sensitization resistance of AISI 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 (wt%). 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 AISI 304 and 316 SS after various isothermal heat treatments using the electrochemical potentiokinetic reactivation (EPR) technique. Comparisons among these heats were found to be consistent with the proposed composite chromium formulism.

• DOE Contract Number: AC06-76RL01830
• OSTI ID: 5685502
• Journal Information: Corrosion (Houston); (United States), Journal Name: Corrosion (Houston); (United States) Vol. 42:1; ISSN CORRA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
CHEMICAL COMPOSITION
CHEMISTRY
CHROMIUM
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORRELATIONS
CORROSION RESISTANCE
CORROSION RESISTANT ALLOYS
ELECTROCHEMISTRY
ELEMENTS
EQUATIONS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HEAT TREATMENTS
IRON ALLOYS
IRON BASE ALLOYS
ISOTHERMAL PROCESSES
MANGANESE ADDITIONS
MANGANESE ALLOYS
MATERIALS
METALLURGICAL EFFECTS
METALS
MOLYBDENUM ALLOYS
NICKEL ADDITIONS
NICKEL ALLOYS
NITROGEN ADDITIONS
QUANTITY RATIO
SILICON ADDITIONS
SILICON ALLOYS
STAINLESS STEEL-304
STAINLESS STEEL-316
STAINLESS STEELS
STEELS
TRANSITION ELEMENTS