| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a golf club head that helps a user increase a carry while securing strength withstanding impact of striking a ball. SOLUTION: The gold club head is characterized by the Young's modulus x of 3,000 to 16,000 (kgf/mm2) and the tensile strength y of 105 to 400 (kgf/mm2) when at least a part 2 of the face portion of which is made of a metal material meeting the relationship of y>=0.006x+60 and Young's modulus is x (kgf/mm2) and tensile strength y is (kgf/mm2).</p> |
