Prototypical tubes of Alloy 600 and 690 (generally known as Inconel), Ni-base alloys, were fabricated by a company in Korea with a through process from vacuum melting to roll straight and belt polishing followed by final thermal treatment in a hydrogen atmospheric environment. THe third and second prototypes of Alloy 600 and 690 materials tubes, respectively, had been manufactured and their mechanical and corrosion properties has been characterized. According to the results, the Korean-made prototypical tubes have shown to have mechanical and corrosion properties comparable to those of commercially available tubes having made by the known foreign companies.
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