Question

The correct sequence of elements of 18-4-1 HSS tool is:

• A. W, Cr, V
• B. Mo, Cr, V
• C. Cr, Ni, C
• D. Cu, Zn, Sn

Hint:

The 18-4-1 HSS contains 18\% Tungsten, 4\% Chromium, and 1\% Vanadium, which enhances its cutting capabilities.

Answer 1

The Correct Option is A

1. HSS Tool Composition:
High-Speed Steel (HSS) is an alloy commonly used for cutting tools. The 18-4-1 designation refers to the composition of the alloy, which includes the percentage of Tungsten (W), Chromium (Cr), and Vanadium (V).
2. Correct Sequence:
18% W (Tungsten), 4% Cr (Chromium), and 1% V (Vanadium).
These elements improve the hardness, wear resistance, and heat resistance of the tool.
3. Other Compositions:
Option 2 (Mo, Cr, V): Mo is molybdenum, which is used in some HSS but is not in the 18-4-1 grade.
Option 3 (Cr, Ni, C): This combination is found in stainless steels, not HSS.
Option 4 (Cu, Zn, Sn): These elements are typically found in brass alloys, not in HSS.