1. The Titanium sponge comes in six grades, i.e. level 0 to level 5. The level 0 grade Titanium sponge is the best material to produce Titanium raw materials because it has low impurities and lower hardness compared to other sponge grades.
2. As the Titanium reacts violently with oxygen and other gases, Vacuum welding, instead of plasma arc welding of compacted briquettes during the Titanium ingot manufacturing, prevents Titanium from reacting with ambient gases.
3. To assure reduced impurity levels, Titanium ingots must be melted three times in a vacuum arc re-melting furnace.
4. The Titanium alloy must be according to ASTM F136 & ISO 5832-3, and CP Titanium must be as per ASTM F67 & ISO 5832-2 standard, which doesn't permit an alpha case layer.
5. While the above standard doesn't define the hardness range of Titanium materials, our research shows that the hardness of Titanium alloy between 29 and 35 HRC should be ideal.
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