Sumitomo Metal Industries, Inc.

Mitsubishi Jukogyo Kabushiki Kaisha

Kunihiko Yoshikawa

Yasutaka Okada

Takeo Kudo

Akio Ikeda

Taishi Moroishi

Hiroo Ohtani

Hiroshi Teranishi

Masaaki Igarashi

Fujimitsu Masuyama

Atsuro Iseda

Yoshiatsu Sawaragi

Hisao Haneda

Takashi Daikoku

An austenitic steel having improved high-temperature strength as well as corrosion resistance is disclosed. The steel consists essentially of, by weight %:

Austenitic steel having improved high-temperature strength and corrosion

A high-strength high-Cr ferritic, heat-resistant steel exhibiting improved high-temperature, long-term creep strength and a process for producing the same are disclosed. The steel consists essentially of, by weight %:

Process for producing a high strength high-Cr ferritic heat-resistant

A precipitation-hardening Ni-base alloy exhibiting improved resistance to corrosion under a corrosive environment containing at least one of hydrogen sulfide, carbon dioxide and chloride ions and method of producing the same are disclosed. The alloy is of the .gamma.'-phase, or (.gamma.'+.gamma.')-phase precipitation hardening type in which Ti is restricted to less than 0.40% and is comprised of:

Precipitation-hardening nickel-base alloy and method of producing same

A process for manufacturing high strength deep well casing, tubing, and drill pipes, which have improved resistance to stress corrosion cracking is disclosed. The process comprises the steps of preparing an alloy composition which is:

Process for making high strength deep well casing and tubing having

An alloy useful for manufacturing high strength deep well casing, tubing and drill pipes for use in oil-well operations is disclosed. The alloy exhibits improved resistance to stress corrosion cracking in the H.sub.2 S--CO.sub.2 --Cl.sup.- environment, which comprises the following alloy composition:

Alloy for making high strength deep well casing and tubing having

An alloy useful for manufacturing high strength deep well casing, tubing and drill pipes for use in oil-well operations is disclosed. The alloy exhibits improved resistance to stress corrosion cracking in the H.sub.2 S--CO.sub.2 --Cl.sup.- -environment, which comprises the following alloy composition:

An alloy useful for manufacturing high strength deep well casing, tubing and drill pipes for use in oil-well operations is disclosed. The alloy exhibits improved resistance to stress corrosion cracking in the H.sub.2 S-CO.sub.2 -Cl.sup.- environment, which comprises the following alloy composition:

An alloy useful for manufacturing high strength oil-well casing, tubing and drill pipes for use in oil-well operations is disclosed. The alloy exhibits improved resistance to stress corrosion cracking in the H.sub.2 S--CO.sub.2 --Cl.sup.- environment, which comprises the following alloy composition:

Growing community of inventors

Suita, Japan

Kunihiko Yoshikawa