Machine Structural Steel Excellent in Machinability and Strength Properties

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United States of America Patent

APP PUB NO 20090274573A1
SERIAL NO

12225897

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Abstract

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The invention provides a machine structural steel excellent in machinability and strength properties that has good machinability over a broad range of machining speeds and also has high impact properties and high yield ratio, which machine structural steel comprises, in mass %, C: 0.1 to 0.85%, Si: 0.01 to 1.5%, Mn: 0.05 to 2.0%, P: 0.005 to 0.2%, S: 0.001 to 0.15%, total Al: greater than 0.05% and not greater than 0.3%, Sb: less than 0.0150% (including 0%), and total N: 0.0035 to 0.020%, solute N being limited to 0.0020% or less, and a balance of Fe and unavoidable impurities.

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Patent Owner(s)

Patent OwnerAddress
NIPPON STEEL CORPORATION6-1 MARUNOUCHI 2-CHOME CHIYODA-KU TOKYO 100-8071

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hashimura, Masayuki Tokyo , JP 45 225
Miyamoto, Kenichiro Tokyo , JP 15 91
Miyanishi, Kei Tokyo , JP 34 61
Mizuno, Atsushi Tokyo , JP 39 449

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