Development of special steels for high-pressure apparatus. Report to the Leuna oil conference on December 22, 1937

Technical Report · Wed Dec 22 04:00:00 EST 1937

OSTI ID:6437784

Wyszomirski,

The main requirements of a steel to be used in high-pressure hydrogenation equipment were sufficient tensile strength and good general mechanical properties, strength at high temperatures, resistance to chemical corrosion, favorable or no catalytic activity for the reaction, and good workability. The most favorable alloying metals for chemical stability seemed to be chromium and molybdenum, whereas nickel sometimes increased corrosion. N5 steel was one of the first steels used widely in hydrogenation; it had 3% chromium, as well as small amounts of molybdenum and vanadium; it continued to be used for reaction ovens. In an attempt to increase the strength at high temperatures, N5 was modified to N6 by the doubling of the chromium content to 6%, but it was found that there was no appreciable such increase in strength. Then tungsten was tried more successfully, in that resulting chromium-tungsten carbides served as blocks to prevent slippage of crystals past other crystals in the steel; the new steel, made from N6, was called N7. The addition of tungsten to N5 gave equally good or even better results; that steel was called N8. Finally, the addition of an appreciable amount of vanadium and certain heat-treating procedure improved the strength at high temperatures even further, giving N10 steel, which was the best type known at the time of the report. N8 and N10 had the additional advantages of being more easily worked because of the lesser amount of chromium they contained. Resistance to corrosion by sulfur was improved by vapor deposition of zinc onto N10 or other steel, forming a surface alloy of zinc and iron. The zinc layer also prevented corrosion by carbon monoxide and some other chemicals. 1 graph, 5 photographs.

• Research Organization: I.G. Farbenindustrie, A.G., Merseburg (Germany)
• OSTI ID: 6437784
• Report Number(s): TOM-54-407-420
• Country of Publication: United States
• Language: German

Related Subjects

01 COAL, LIGNITE, AND PEAT
010403 -- Coal & Coal Products-- Hydrogenation-- (-1987)
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
360103 -- Metals & Alloys-- Mechanical Properties
360104 -- Metals & Alloys-- Physical Properties
ALLOYS
BERGIUS PROCESS
CARBIDES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHROMIUM ALLOYS
COAL
COAL LIQUEFACTION
COAL LIQUEFACTION PLANTS
COMPARATIVE EVALUATIONS
CORROSIVE EFFECTS
CRYOGENIC FLUIDS
DEPOSITION
DIAGRAMS
ELEMENTS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
HEAT TREATMENTS
HIGH PRESSURE
HIGH TEMPERATURE
HYDROGEN
HYDROGENATION
IMAGES
INDUSTRIAL PLANTS
IRON ALLOYS
IRON BASE ALLOYS
LIQUEFACTION
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
STEELS
SULFUR
SYNTHETIC FUELS
THERMOCHEMICAL PROCESSES
TUNGSTEN ALLOYS
VANADIUM ALLOYS
WELDABILITY
ZINC ALLOYS