Jfe Steel Corporation

Hanyou Sou

Yusuke Nakagawa

Yoichiro Yamanaka

Takeshi Suzuki

Katsumi Kojima

Mikito Suto

Yuya Baba

Shunsuke Tokui

A steel sheet for can making and methods for manufacturing the same. The steel sheet includes, in order from a steel sheet side, an iron-nickel diffusion layer, a metallic chromium layer, and a chromium oxide layer. The iron-nickel diffusion layer has a nickel coating weight of 50 mg/mto 500 mg/mper surface of the steel sheet and a thickness of 0.060 μm to 0.500 μm per surface of the steel sheet. The metallic chromium layer includes a flat-like metallic chromium sublayer and a granular metallic chromium sublayer placed on a surface of the flat-like metallic chromium sublayer. The total chromium coating weight of both sublayers per surface of the steel sheet is 60 mg/mto 200 mg/m. The chromium oxide layer has a chromium coating weight 3 mg/mto 10 mg/mper surface of the steel sheet in terms of metallic chromium.

Steel sheet for can making and method for manufacturing the same

A steel sheet for cans which exhibits excellent weldability; and a production method therefor include a steel sheet for cans with the surface of a steel sheet in order from the steel sheet side, a chromium metal layer and a hydrous chromium oxide layer. The deposited amount of the chromium metal layer is 65-200 mg/m. The deposited amount of the hydrous chromium oxide layer in terms of chromium is 3-30 mg/m. The chromium metal layer includes: a base part having a thickness of 7.0 nm or higher; and granular protrusions which are on the base part, have a maximum grain size of 100 nm or lower, and have a number density per unit area of at least 200 per &#x3bc;m.

Steel sheet for cans, and production method therefor

A steel sheet for cans which exhibits excellent weldability; and a production method therefore include the surface of a steel sheet in order from the steel sheet side, a chromium metal layer and a hydrous chromium oxide layer. The deposited amount of the chromium metal layer is 50-200 mg/m. The deposited amount of the hydrous chromium oxide layer in terms of chromium is 3-30 mg/m. The chromium metal layer includes: a base part having a thickness of 7.0 nm or higher; and granular protrusions which are on the base part, have a maximum grain size of 200 nm or lower, and have a number density per unit area of at least 30 per &#x3bc;m.

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Tokyo, Japan

Hanyou Sou