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Chemical Engineering Basics - Engineering

Q1:

What is the percentage of chromium in 18-4-1 high speed steel ?

A 1

B 4

C 18

D 23

ANS:B - 4

In the designation "18-4-1" high-speed steel, the numbers typically represent the percentage composition of various alloying elements in the steel.

  • The first number (18) indicates the percentage of chromium.
  • The second number (4) represents the percentage of tungsten.
  • The third number (1) represents the percentage of vanadium.
Therefore, the percentage of chromium in 18-4-1 high-speed steel is 18%.