Development of high-chromium ferritic clad heat exchanger tubing. [Sanicro 28, Carpenter 20 Mo-76, Al-6XN, Monit, SEA-CURE, Inconel 625, Hastelloy C-276, Hastelloy G-3]
High chromium, corrosion resistant alloys are required to withstand the high temperatures and corrosive environment of coal gasification plants such as the Cool Water facility. The production of tubing for heat exchangers from high alloy materials is a priority goal of the EPRI gasification materials program. Because many high chromium alloys are very expensive and have little elevated temperature strength, it would be advantageous to clad the outside surface of low alloy, elevated temperature steel tubes with the corrosion resistant alloy and rely on the low alloy steel for structural strength. Evaluation of commercial alloys for possible use as monolithic or coextruded tubes identified four compositions suitable for evaporator tube applications and four compositions for superheater applications. In addition, a series of alloys containing 30% chromium were evaluated for their ability to be coextruded with 1.25Cr-0.5Mo steel, undergo welding and resist gasification corrosion. An alloy, nominally 30Cr-2Ni-2Mo, was successfully coextruded to various tubing sizes and provided to EPRI for testing in the Cool Water gasification plant. 18 refs., 28 figs., 28 tabs.
- Research Organization:
- AMAX Materials Research Center, Ann Arbor, MI (USA)
- OSTI ID:
- 5868634
- Report Number(s):
- EPRI-AP-4579; ON: TI86920283
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
COAL GASIFICATION PLANTS
HEAT EXCHANGERS
HASTELLOYS
CHEMICAL COMPOSITION
CORROSION
MECHANICAL PROPERTIES
TUBES
INCONEL 625
MATERIALS TESTING
CHROMIUM-MOLYBDENUM STEELS
CLADDING
EXPERIMENTAL DATA
EXTRUSION
FERRITIC STEELS
HIGH TEMPERATURE
WELDING
ALLOYS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
DATA
DEPOSITION
FABRICATION
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INCONEL ALLOYS
INDUSTRIAL PLANTS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
JOINING
MATERIALS
MATERIALS WORKING
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM ALLOYS
NUMERICAL DATA
STEELS
SURFACE COATING
TANTALUM ALLOYS
TESTING
010404* - Coal
Lignite
& Peat- Gasification
360101 - Metals & Alloys- Preparation & Fabrication
360105 - Metals & Alloys- Corrosion & Erosion
360103 - Metals & Alloys- Mechanical Properties