Which material is used when high hardness is needed for tools such as screwdrivers and hammers?

Which material is used when high hardness is needed for tools such as screwdrivers and hammers?

• A. High carbon steel
• B. Mild Steel
• C. Stainless steel
• D. Iron

Answer: (A)

High hardness in hand tools comes from steel whose carbon content allows it to be hardened by heat treatment. High carbon steel has enough carbon that, when quenched and tempered, its structure transforms to hard martensite, giving a surface that resists wear and holds an edge. This makes it well suited for tools like screwdrivers and hammer faces, where you need the material to be hard and wear-resistant but still tough enough to absorb impacts. Mild steel contains too little carbon, so it stays soft and deforms easily under use. Stainless steel, while corrosion resistant, is more expensive and its alloys don’t always give the same combination of hardness and toughness for hammer or screwdriver applications as carbon steel. Iron by itself is too soft to maintain a sharp edge or endure repeated impacts.

High hardness in hand tools comes from steel whose carbon content allows it to be hardened by heat treatment. High carbon steel has enough carbon that, when quenched and tempered, its structure transforms to hard martensite, giving a surface that resists wear and holds an edge. This makes it well suited for tools like screwdrivers and hammer faces, where you need the material to be hard and wear-resistant but still tough enough to absorb impacts.

Mild steel contains too little carbon, so it stays soft and deforms easily under use. Stainless steel, while corrosion resistant, is more expensive and its alloys don’t always give the same combination of hardness and toughness for hammer or screwdriver applications as carbon steel. Iron by itself is too soft to maintain a sharp edge or endure repeated impacts.