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Grain Flow Forging™

Mizuno's Patented Grain Flow Forging" process enhances the flow and tightness of the grains in the metal, maximizing the strength of the clubhead without sacrificing the soft feel, and ensuring greater consistency from club to club and set to set.

 
Step 1
 
 
Step 2
 
 

 
1025 Select Mild Carbon Steel Billet
Our material meets 6 times tighter specs than the industry standard, optimizing softness and strength.



 
Primary Forging
Primary forging shapes the head and ensures grains are aligned and tightened.
 
Step 3
 

Step 4
   
 


 
Heat Treatment
Aging the head at elevated temperature optimizes strength
and softness.



 
Precision Forging First Shot
Precision forging ensures precise shape, consistent grain structure, and tight tolerance for precise performance.
 
Step 5
 

Step 6
 
 


 
Precision Forging Second Shot
Modified U-grooves are hydraulically forged into the clubface for optimal spin rate.

 
Finished Product
Final polishing and double nickel chrome plating complete the process.