In the past 20 years, Kobe Steel has developed and commercialized various titanium alloys. AKOT is a corrosion-resistant alloy, in which Cr has the important role of enriching Pd and Ru on the corroded surface. Ti-1.2ASN is a heat-resistant alloy that can be used at temperatures up to 800℃, in which oxidation resistance has been improved by the addition of Al and Si, and grain growth is inhibited by silicide. Ti-9 is a quasi Ti-6Al-4V alloy that is as coilable as CP-titanium. Its Al content has been suppressed to 4.5 to enhance cold rollability, and Si has been added to ensure the ductility of welds. KS EL-F is a quasi Ti-6Al-4V and is as hot-forgeable as CPtitanium, in which C is exploited to achieve high strength at temperatures up to approximately 500℃ and to reduce ffow stress during hot-forging.
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