Steels used in hydrogenation

Technical Report · Fri Oct 16 04:00:00 EDT 1942

OSTI ID:6992771

This report concerned itself with steels which had been developed to resist attack by hydrogen or hydrogen sulfide and to have high creep strength. One such type of steel was V/sub 2/A (18% chromium, 8% to 9% nickel, 0.12% carbon). This steel, however, was expensive, difficult to work in some ways, and subject to grain-breakdown in high-temperature acid conditions. The grain-breakdown could be prevented by addition of titanium, tantalum, or columbium, and several other advantages including greater hydrogen-resistance could be obtained by replacing some or all of the nickel by molybdenum. These facts led to development of a series of steels (the N-series) which contained less chromium and some molybdenum and vanadium and tungsten. Some of the steels in this series were N6(0.15 to 0.2% C, 6% Cr, 0.5% Mo, 0.1 to 0.2% V), N8(0.18% C, 3% Cr, 0.5% W, 0.5% Mo, 0.1% V), and N10(0.17 to 0.22% C, 2.5 to 3% Cr, 0.35 to .5% Mo, 0.35 to 0.5% W, 0.7 to 0.86% V). The creep strength of these steels varied from 15 kg/mm/sup 2/ for N6 to 18 kg/mm/sup 2/ for N8, to 90 to 100 kg/mm/sup 2/ for N10. The great strength of N10 was due to careful heat (1050/sup 0/C) and annealing (700/sup 0/C) treatment which produced a solution of vanadium carbide in positions to block slippage planes. The best protection against attack by hydrogen sulfide was achieved by coating the steel (which would tend to form iron sulfide deposits) with zinc in a galvanizing process. The steels mentioned so far were developed before wartime scarcities caused the necessity of varying the steels to try to save chromium, molybdenum, and tungsten by partially replacing them with vanadium, manganese, and silicon. The report included a table of earlier and later versions of the steels, with indications of compositions and uses. 1 table.

• Research Organization: Texas A and M Univ., College Station (USA)
• OSTI ID: 6992771
• Report Number(s): TOM-237-716-720
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
36 MATERIALS SCIENCE
360100 -- Metals & Alloys
ALLOYS
CARBON
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHROMIUM
CHROMIUM ALLOYS
CHROMIUM STEELS
COAL
COAL LIQUEFACTION PLANTS
COMPARATIVE EVALUATIONS
CONTAINERS
CONTROL EQUIPMENT
CORROSIVE EFFECTS
CRYOGENIC FLUIDS
ELEMENTS
ENERGY SOURCES
EQUIPMENT
FASTENERS
FLANGES
FLOW REGULATORS
FLUIDS
FOSSIL FUELS
FUELS
HARDENING
HEAT TREATMENTS
HIGH PRESSURE
HIGH TEMPERATURE
HYDRIDATION
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
HYDROGENATION
INDUSTRIAL PLANTS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
JOINTS
MANGANESE
MATERIALS
MECHANICAL PROPERTIES
METALS
MOLYBDENUM
NICKEL
NIOBIUM
NONMETALS
PIPE FITTINGS
PIPE JOINTS
PIPELINES
PIPES
PRESSURE VESSELS
REFRACTORY METALS
SEMIMETALS
SILICON
SPECIFICATIONS
STEELS
SULFIDES
SULFUR COMPOUNDS
TABLES
TANTALUM
TEMPERING
TENSILE PROPERTIES
TITANIUM
TRANSITION ELEMENTS
TUBES
TUNGSTEN
VALVES
VANADIUM
VAPOR CONDENSATION
ZINC