Question

Steel containing up-to 0.15% carbon, is known as

• A. mild steel
• B. dead mild steel
• C. medium carbon steel
• D. high carbon steel

Answer 1

Answer:

A. mild steel

Steel with up to 0.15% carbon is known as mild steel. Dead mild steel has a carbon content of 0.05 to 0.15% and is very ductile. Mild steel has a carbon content of 0.15 to 0.3% and is soft and ductile, Medium carbon steel has a carbon percentage of 0.3 to 0.8% and has better strength than mild steel, but is less ductile. High carbon steel has a carbon percentage of 0.8 to 1.5% and is very hard and strong. High- speed steel is a high alloy steel used for cutting tools with a composition of 18-4-1 (tungsten 18%, chromium 4%, vanadium 1%).