Abstract: This hot-rolled copper alloy sheet contains Mg: 0.2 mass % or more and 2.1 mass % or less, and Al: 0.4 mass % or more and 5.7 mass % or less, with a remainder being Cu and inevitable impurities, among the inevitable impurities, an amount of Fe is 0.0020 mass % or less, an amount of O is 0.0020 mass % or less, an amount of S is 0.0030 mass % or less, and an amount of P is 0.0010 mass % or less, a special grain boundary length ratio (L?/L) which is a ratio of a sum L? of lengths of grain boundaries with 3???29 to a length L of all measured crystal grain boundaries by an EBSD method is 20% or more, and an average crystal grain size ?A in a sheet-thickness central portion is 40 ?m or less.

Abstract: This hot-rolled copper alloy sheet contains Mg: 0.2 mass % or more and 2.1 mass % or less, Al: 0.4 mass % or more and 5.7 mass % or less, and Ag: 0.01 mass % or less, with a remainder being Cu and inevitable impurities, an area ratio of Cube orientation (area ratio of crystal orientation) measured by an EBSD method is 5% or less, an average KAM value when a boundary between adjacent pixels where an orientation difference between the pixels is 5° or more is regarded as a crystal grain boundary is 2.0 or less, and an average crystal grain size ? in a sheet-thickness central portion is 40 ?m or less.

Abstract: This copper alloy wire is a copper alloy wire which is made of a precipitation hardening-type copper alloy containing Co, P, and Sn and is manufactured using a continuous cast-rolling method or cold working of a continuous cast wire rod manufactured using a continuous casting method, in which the copper alloy wire has a composition including Co: more than or equal to 0.20 mass % and less than or equal to 0.35 mass %, P: more than 0.095 mass % and less than or equal to 0.15 mass %, and Sn: more than or equal to 0.01 mass % and less than or equal to 0.5 mass % with a balance being Cu and inevitable impurities.

Abstract: This copper alloy wire is a copper alloy wire which is made of a precipitation hardening-type copper alloy containing Co, P, and Sn and is manufactured using a continuous cast-rolling method or cold working of a continuous cast wire rod manufactured using a continuous casting method, in which the copper alloy wire has a composition including Co: more than or equal to 0.20 mass % and less than or equal to 0.35 mass %, P: more than 0.095 mass % and less than or equal to 0.15 mass %, and Sn: more than or equal to 0.01 mass % and less than or equal to 0.5 mass % with a balance being Cu and inevitable impurities.