規格番号：ASTM A389/A389M
タイトル：Standard Specification for Steel Castings, Alloy, Specially Heat-Treated, for Pressure-Containing Parts, Suitable for High-Temperature Service
耐熱部品に適した特殊鋳鉄用合金、特に熱処理された合金の標準仕様
http://www.astm.org/cgi-bin/resolver.cgi?A389A389M