Hot extruded high-temperature alloy tubes and some mechanical properties

Journal Article · Sun Jul 01 04:00:00 EDT 1984 · Nucl. Technol.; (United States)

OSTI ID:6475834

Aigner, H; Degischer, H P; Hertner, E

Seamless hot extruded tubes serve as structural materials of high-temperature gas-cooled reactors and coal conversion systems with exposure temperatures up to 1000/sup 0/C. The tube dimensions ( about130- X 15-mm diam) were produced according to the proposed requirements for methane reformer heat exchangers of nuclear process gas production systems. The most sensitive extrusion parameter is the temperature of the expanded billet at the press, where it should reach 1140 to 1180/sup 0/C depending on the materials investigated: Incoloy-800H, Incoloy-802, Hastelloy-X, Inconel-617, and Nimonic-86. To qualify the extrusion products, the mechanical properties obtained from tensile tests at room temperature and temperatures up to 1000/sup 0/C are compared for tube products. Strengthening effects at 800/sup 0/C are explained by carbide precipitation during the test, especially of alloys 800H and 802.

• Research Organization: Vereinigte Edelstahlwerke AG, A-2630, Ternitz
• OSTI ID: 6475834
• Journal Information: Nucl. Technol.; (United States), Journal Name: Nucl. Technol.; (United States) Vol. 66:1; ISSN NUTYB
• Country of Publication: United States
• Language: English

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36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
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ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
CARBIDES
CARBON ADDITIONS
CARBON COMPOUNDS
CHROMIUM ALLOYS
COBALT ALLOYS
COMPARATIVE EVALUATIONS
EXTRUSION
FABRICATION
GAS COOLED REACTORS
GRAPHITE MODERATED REACTORS
HASTELLOY X
HASTELLOYS
HEAT EXCHANGERS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HOT WORKING
HTGR TYPE REACTORS
INCOLOY 800H
INCOLOY 802
INCOLOY ALLOYS
INCONEL 617
INCONEL ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MANGANESE ADDITIONS
MANGANESE ALLOYS
MATERIALS
MATERIALS TESTING
MATERIALS WORKING
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIMONIC
NIMONIC 86
PRECIPITATION
PROCESS HEAT REACTORS
REACTOR MATERIALS
REACTORS
SEPARATION PROCESSES
SILICON ADDITIONS
SILICON ALLOYS
TEMPERATURE DEPENDENCE
TESTING
TITANIUM ADDITIONS
TITANIUM ALLOYS
TUBES
TUNGSTEN ALLOYS
VERY HIGH TEMPERATURE