High nitrogen corrosion resistant austenitic stainless steels made by hot isostatic compaction of gas atomized powder

Book · Tue Oct 01 00:00:00 EDT 1996

OSTI ID:379687

Rhodes, G O; Eckenrod, J J ^[1]; Rizzo, F J ^[2]

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1. Crucible Research, Pittsburgh, PA (United States)
2. Crucible Compaction Metals, Oakdale, PA (United States)

A model has been developed to design austenitic stainless steels containing 25 to 28% chromium, 22% nickel, 6% manganese, 4 to 8% molybdenum, and about 0.80% nitrogen. The newly developed steels have been produced by rapid solidification powder metallurgy (P/N4) with subsequent consolidation by hot isostatic pressing (HIP). The resulting chemical compositions meet the criteria of the alloy design model, predicting a fully austenitic microstructure, a yield strength of about 620 MPa, a minimum Pitting Resistance Equivalence (PRE) number of 50, a sigma solvas temperature of less than 1,232 C, a nitrogen equilibrium partial pressure at 1,600 C of about 500 kPa, and an alloy cost factor of 0.6 or less relative to UNS N10276. The results of experimental investigations of these materials compared to the predictions of the design model are presented, in addition to evaluations of other HIP P/M processed austenitic and superaustenitic stainless steels, and nickel base corrosion resistant alloys.

• OSTI ID: 379687
• Report Number(s): CONF-960389-; TRN: IM9644%%143
• Resource Relation: Conference: National Association of Corrosion Engineers (NACE) annual corrosion conference and exposition: water and waste water industries, Denver, CO (United States), 24-29 Mar 1996; Other Information: PBD: 1996; Related Information: Is Part Of Corrosion/96 conference papers; PB: [6615] p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHROMIUM-NICKEL-MOLYBDENUM STEELS
MECHANICAL PROPERTIES
CORROSION RESISTANCE
FABRICATION
MICROSTRUCTURE
NITROGEN
METALLURGICAL EFFECTS
CORROSION RESISTANT ALLOYS
MATHEMATICAL MODELS
HOT PRESSING
COMPARATIVE EVALUATIONS
NITROGEN ADDITIONS
PITTING CORROSION
CREVICE CORROSION
INTERGRANULAR CORROSION
EXPERIMENTAL DATA