Tungsten carbide boring bar is made from tungsten carbide based high density alloy or steel. Alloy steel shank is the most common material, there are some tungsten carbide bar manufacturers using AISI 1144 carbon high speed steel.Regardless of the grade of steel and alloy steel, has the same modulus of elasticity: E = 30 × 106psi. A common misconception is that high hardness or high-quality steel boring bars can reduce the amount of deflection. And the deflection is calculated from the formula can be seen, the deflection of the variable determining the elastic modulus is not hardness.
Tungsten carbide boring bars made of the amount of deflection is very small, because of its much higher elastic modulus than steel and high-density tungsten alloy. Tungsten carbide boring bars typical content produced carbide grade is 90% to 94% cobalt content of 10% to 6%, according to industry coding requirements, such brands belong to C-1 (E = 82 × 106 ~ 84 × 106psi), C-2 (E = 85 × 106 ~ 87 × 106psi) or C-3 (E = 89 × 106psi) series.
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