Qualitative beta titanium. 3, tungsten: tungsten density is quite large, about 4.5cheap golf clubs
times of titanium, more for stem head counterweight. Tungsten (19.5) 4, mild steel: soft iron in casting iron. When in stainless steel, add the 2 to 4% of the carbon that becomes very hard; Callaway RAZR Hawk Driver
Forging, add 0.1 ~ 0.3% of carbon, can become soft; Stainless steel, stainless steel, 5-sus630 (added 17% 4% chromium and nickel)-more for casting, earlier for the PING famous back empty type cast iron, now widely used in iron and wood pole. -sus304 (added 18%
chromium and nickel 8%), it sus630 than soft. 6, other materials: beryllium copper: (copper + 1% ~ 2.5% in the beryllium), than stainless steel weighing about 6-7%-often used to make
dig up stem. Aluminum alloy: (+ 4%-6% aluminum lead and 2% 3% magnesium),
lighter, stronger and easy processing, also used in the manufacture of DRIVER stem head. 7, push rod materials: stainless steel, copper, bronze, copper, polymer, polyurethane, aluminum, stainless steel