Question

Hard steel contains

(a) 2 to 5% carbon

(b) 0.5 to 1.5% carbon 

(c) 0.1 to 0.4% carbon 

(d) 0.01 to 0.04% carbon

Answer 1

(b) 0.5 to 1.5% carbon 

Hard steel is a type of carbon steel that contains more than 0.3% carbon. This makes it a much harder material than mild steel, which contains less carbon. Hard steel is also known as high-carbon steel or tool steel.