Hobs are often made from oil-hardened tool steels containing a high percentage of____.
A) nickel
B) aluminum
C) chromium
D) copper alloy

Question

Quizplus · Accepted Answer

Hobs, which are tools used for cutting gears, are often made from oil-hardened tool steels that contain a high percentage of chromium. Chromium is added to steel to increase hardness, toughness, and wear resistance, which are essential properties for tools that are used in cutting applications.

Hobs Are Often Made from Oil-Hardened Tool Steels Containing a High