Nippon Steel Corporation

Nippon Steel Sumitomo Metal Corporation

Kazuyoshi Fujisawa

Takashi Maeda

Kazuhiko Adachi

Kouichi Takeuchi

Masaru Abe

Masayuki Shibuya

Yuuichi Fukumura

A metal plate for laser processing (such as a stainless steel plate or a titanium plate) and preferably an austenitic stainless steel plate suitable for use as a metal mask or the like which undergoes fine processing with a laser has an average grain diameter d (&#x3bc;m) and a plate thickness t (&#x3bc;m) which satisfy the equation d&#x2264;0.0448&#xb7;t&#x2212;1.28.

Metal plate for laser processing and method for producing stainless steel plate for laser processing

Martensitic mixed phase stainless steel, which has in well balance between excellent strength and formability and excellent fatigue properties, and is inexpensive, and suitable for spring members, has: a chemical composition comprising C: 0.1-0.4%, Si: at most 2.0%, Mn: 0.1-6.0%, Cr: 10.0-28.0%, N: at most 0.17%, the remainder of Fe and impurities, and a metallurgical structure which includes a ferrite phase and a martensitic phase, and also a retained austenite phase of 5 volume % or less if necessary, and which satisfies a relationship of C/C&#x2267;5.0 where an average value Cof C content existing in the ferrite phase, and an average value Cof C content existing in the martensite.

Stainless steel and method for manufacturing same

Growing community of inventors

Tokyo, Japan

Kazuyoshi Fujisawa