Question

High speed steel tool material contains carbon
1. 0.6% - 1.0%
2. 2.0% - 4.3%
3. 0.6% - 4.3%
4. 6% - 10%

Answer 1

Correct Answer - Option 1 : 0.6% - 1.0%

Explanation:

• The composition of high speed tools or high speed steel (HSS) is 18% W, 4% Cr, 1% V, 0.7% C and rest Fe.
• High-speed tool steels are used for most of the common types of cutting tools including single-point lathe tools, drills, reamers, taps, milling cutters, end mills, hobs, saws, and broaches.
• Properties of HSS:
  • High working hardness
  • High wear resistance
  • Excellent toughness
  • High retention of hardness and hot hardness.