Nikkei Mc Aluminium Co., Ltd.

Mazda Motor Corporation

Yutaro Kitaki

Hiroshi Horikawa

Naoaki Yamamoto

Katsumi Fukaya

Tsutomu Masuda

Makoto Otsuka

Makato Otsuka

An Al&#x2014;Si&#x2014;Mg aluminum alloy is provided. The Al&#x2014;Si&#x2014;Mg aluminum alloy includes: 5 mass % or larger and 10 mass % or smaller of Si; 0.2 mass % or larger and 1.0 mass% or smaller of Mg, 0.03 mass % or larger and 0.5 mass % or smaller of Sb; 0.0004 mass % or larger and 0.0026 mass % or smaller of Be; and a remainder having an alloy composition including Al and unavoidable impurities. In L*a*b* color system, a value of L* that indicates lightness of a surface thereof is 55 or larger.

Al&#x2014;Si&#x2014;Mg aluminum alloy

A method for manufacturing an Al&#x2014;Si&#x2014;Mg aluminum alloy casting material is provided. The method for manufacturing an Al&#x2014;Si&#x2014;Mg aluminum alloy casting material includes performing heat treatment on an Al&#x2014;Si&#x2014;Mg aluminum alloy casting material containing 5 mass % or larger and 10 mass % or smaller of Si, 0.2 mass % or larger and 1.0 mass % or smaller of Mg, 0.03 mass % or larger and 0.5 mass % or smaller of Sb, and 0.0004 mass % or larger and 0.0026 mass % or smaller of Be, and a remainder having an alloy composition including Al and unavoidable impurities.

Method for manufacturing Al&#x2014;Si&#x2014;Mg aluminum alloy cast material

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Tokyo, Japan

Yutaro Kitaki