Mizuno

The Grain Flow Forging process was patented in 1998 – to create a precise iron head through multiple forging stages from a single billet of steel. Begin exploring what makes Grain Flow Forging a unique process…

What is grain flow forged

WHAT IS GRAIN FLOW FORGING?

  • Grain Flow Forging allows for a highly precise iron head to be crafted through multiple forging stages from a single billet of steel.
  • The method uses the metal's natural grain to enhance the head's integrity, consistency and durability.
  • Mizuno is the only company to arrange and control this flow to pass on a performance benefit to the golfer.

CAST VS. FORGED

CAST HEAD

Cast or ‘form forged’ head with loss of internal grain structure

FORGED HEAD

Mizuno Grain Flow Forged with tight, reinforced grain structure.

ONE PIECE & MULTI‐PIECE CONSTRUCTION

One piece Grain Flow Forging
Neck and head are forged from the same single billet of steel, ensuring continuous grain through the head.

Competitor forged iron with welded neck
Unlike a Mizuno Grain Flow Forged iron the iron is made with two parts – with no continuous grain through the head.

SOUND TEST