Patent ID: 11959161
Assignee: FURUKAWA TECHNO MATERIAL CO., LTD.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 2:
3. The copper-based alloy material according to claim 1, wherein in the alloy material, a direction of working which is a direction of rolling or a direction of wire drawing is a direction of extension, a cross section is circular or polygonal and an elongated shape is provided as a whole, and
when a semi-circumferential surface obtained by partitioning an entire circumferential surface which is a surface other than both end surfaces of the alloy material with a pair of end edge half portions which are respectively located in end edges of both the end surfaces and which have a semi-circumferential length corresponding to a length of half an entire circumference of the end edges and a pair of extension line portions which respectively couples both ends of the pair of end edge half portions and which are generatrices or ridge lines of the alloy material is seen,
a crystal grain boundary does not exist on the semi-circumferential surface or an existence frequency of the crystal grain boundary is equal to or less than 0.2 even when the crystal grain boundary exists.