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Questions and Answers
Which type of steel is known for having the highest carbon content?
Which type of steel is known for having the highest carbon content?
- Low carbon steel
- Medium carbon steel
- Stainless steel
- Cast iron (correct)
Stainless steel is known for its poor resistance to corrosion.
Stainless steel is known for its poor resistance to corrosion.
False (B)
What is a common use for low carbon steel?
What is a common use for low carbon steel?
nuts and screws
High speed steel contains 18% ______ and 4% chromium.
High speed steel contains 18% ______ and 4% chromium.
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Match the following ferrous materials with their characteristics:
Match the following ferrous materials with their characteristics:
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What is the melting temperature of medium carbon steel?
What is the melting temperature of medium carbon steel?
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Study Notes
Ferrous Materials
-
Low Carbon Steel
- Characteristics: Ductile, high tensile strength, tough, malleable
- Corrosion resistance: Poor
- Carbon content: 0.15-0.30%
- Melting temperature: 1430°C
- Common uses: Nuts, screws
-
Medium Carbon Steel
- Characteristics: Harder than low carbon steel but less ductile, malleable, tough
- Carbon content: 0.30-0.70%
- Melting temperature: 1420°C
- Common uses: Gardening tools such as forks
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Cast Iron
- Structure: Hard outer skin with a brittle core
- Performance: Good under compression
- Carbon content: 3.5%
- Melting temperature: 1150°C
- Common uses: Machine parts
Ferrous Alloys
-
Stainless Steel
- Key feature: Corrosion resistant
- Composition: 18% chromium, 8% nickel
- Melting temperature: 1510°C
- Common uses: Sink materials, cutlery
-
High Speed Steel (HSS)
- Key feature: High resistance to frictional heat
- Composition: 18% tungsten, 4% chromium, 1% vanadium, 0.5-0.8% carbon
- Common uses: Drill bits, router bits
-
Die Steel (Tool Steel)
- Typically categorized as hard and tough materials suitable for tooling applications.
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