Which neutral elements do not form carbides?

Q.  Which of the following neutral elements neither form carbides nor cause graphitization?
- Published on 11 Sep 15

a. Aluminium
b. Chromium
c. Cobalt
d. Copper

ANSWER: Cobalt


  • Tauseef Ahmed Shaikh Mukhtar   -Posted on 18 Apr 17
    It best for our knowledge and to enhance our subject ?knowledge i think it is very best
  • Sravanthi   -Posted on 21 Nov 15
    - Alloys steels are obtained when elements such as nickel, chromium, manganese, vanadium, etc. are added to carbon steels.

    - These elements impart fine grain size to steel, to improve casehardening properties and elasticity, etc.

    - These alloying elements are classified as:

    1) Carbide forming elements: Alloy carbides are hard and increases abrasion resistance. Carbides such as chromium and vanadium have maximum hardness during tempering of high alloy tool steels.

    2) Neutral elements: The element which neither forms carbides nor causes graphitization is Cobalt. Cobalt refines graphite and pearlite and also improves heat resistance. It contributes to red-hardness by hardening ferrite and improves mechanical properties like tensile strength, fatigue strength and hardness.

    3) Graphitizing elements: These elements are used to decompose carbides into graphite.

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