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GCSE Design and Technology · key term
Steel containing more carbon than mild steel, giving high hardness and wear resistance but greater brittleness.
Used by Edexcel
Specification 2.2.1 · Paper 1
Revise: Ferrous MetalsMild steel has little carbon; high carbon steel has more. Stainless steel contains chromium, often with nickel, while tungsten steel contains tungsten. Cast iron has a higher carbon content than steels and good casting properties.
Justify a material choice by linking a property to the product’s requirements: ‘High carbon steel is hard and wear-resistant, so a saw blade can retain its cutting edge.’
Do not confuse high carbon steel with tungsten steel. Both suit cutting tools, but tungsten-containing high-speed steel is especially useful when cutting generates heat.
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