Sumitomo Metal Industries, Inc.

Sankin Industry Company, Limited

Tomio Nishikawa

Yoshiaki Shida

Minoru Okada

Kazuyuki Nakano

Shiro Kitayama

Ryozo Isomura

Isamu Kato

A method of improving the resistance of oil-well tubular products made of .alpha.-type or (.alpha.+.beta.)-type Ti-based alloys to corrosion in a deep-well environment at high temperatures is disclosed. The method is characterized by adding, as an alloying element, (A) at least one platinum group metal in an amount of 0.02-0.20% by weight, or (B) at least one platinum group metal in an amount of 0.005-0.12% by weight and optionally at least one of Ni, Co, W, and Mo in an amount of 0.05-2.00% by weight.

Method of improving the resistance of Ti-based alloys to corrosion in

A denture base of pressure-formed, superplastic alloy plate, and a method of making a metal denture base, includes providing a superplastic alloy plate and a female die having a finishing surface, and pressure-forming the alloy plate on the finishing surface of the female die at a temperature where the alloy exhibits superplasticity.

Swaged metal denture base

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Amagasaki, Japan

Tomio Nishikawa