| 摘要 |
<p>PURPOSE: To provide a golf club head which is much more excellent than a conventional stainless steel or titanium alloy head in strength (durability) enables manufacture of a lightweight and large head and utilizes age hardened material of Ni system marageing steel. CONSTITUTION: In a metallic golf club head comprising a face portion, a neck portion, a sole portion and a top portion, at least part of the face portion is constituted of age hardened material of Ni system marageing steel.</p> |
