Abstract: Embodiments of golf club heads with a plurality stress zones and methods to manufacture golf club heads are generally described herein. Other embodiments may be described and claimed.

Abstract: A set of at least three iron-type golf club heads where each golf club head includes a forward wall having a front surface arranged for impacting a golf ball, a back surface disposed generally parallel to the front surface and a thickness dimension measured between the front and back surfaces. A rearward wall is spaced from the forward wall, and a pocket is defined between the back surface of the forward wall and an inner surface of the rearward wall. A weight member is disposed in the pocket. The forward wall thickness dimension of a first golf club head with a medium loft angle such as a six iron is greater than the forward wall thickness dimension of a second golf club head with a low loft angle such as a three iron but less than the forward wall thickness dimension of a third golf club head with a high loft angle such as a nine iron.

Abstract: A golf club head with a front wall, a rear wall and a reinforced crown includes ribs in the crown that are spaced more closely together near the front wall than near the rear wall. Preferably, the ribs radiate from a point in space located forward of the front wall. This arrangement of ribs significantly increases the fundamental structural frequency of the club head and significantly reduces the peak stress in the crown of the club head when compared with ribs extending perpendicular to the front wall and parallel to each other.