Patent ID: 11946129
Assignee: DOWA METALTECH CO., LTD.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 1:
2. The copper alloy sheet material according to claim 1, wherein an average crystal particle diameter in a sheet thickness direction defined by the following (B) is 50.0 μm or less,
(B) a straight line is randomly drawn in the sheet thickness direction on an optical micrograph obtained through observation of a cross section (C cross section) perpendicular to a rolling direction, and an average cut length of crystal particles cut by the straight line is designated as the average crystal particle diameter in the sheet thickness direction, provided that on one or plural observation view fields, plural straight lines that do not redundantly cut the same crystal particle are randomly set, and the total number of crystal particles that are cut by the plural straight lines is 100 or more.