Podcast
Questions and Answers
Which of the following is NOT a ferrous metal?
Which of the following is NOT a ferrous metal?
- Medium Carbon Steel
- Low Carbon Steel
- Cast Iron
- Aluminium (correct)
Low Carbon Steel rusts easily and requires surface coating or galvanization to prevent corrosion.
Low Carbon Steel rusts easily and requires surface coating or galvanization to prevent corrosion.
True (A)
What is a disadvantage of using Duralumin in aircraft parts?
What is a disadvantage of using Duralumin in aircraft parts?
- It is too lightweight.
- It work hardens and can become brittle. (correct)
- It is difficult to machinate.
- It is not ductile.
Brass is a malleable alloy that is used in the manufacturing of musical instruments.
Brass is a malleable alloy that is used in the manufacturing of musical instruments.
What are High Speed Steel cutting tools primarily used for?
What are High Speed Steel cutting tools primarily used for?
Duralumin is very similar to _________ in appearance.
Duralumin is very similar to _________ in appearance.
Match the alloy with its respective use:
Match the alloy with its respective use:
What is a primary advantage of recycling steel compared to making it from iron ore?
What is a primary advantage of recycling steel compared to making it from iron ore?
Aluminium can be recycled indefinitely without losing its properties.
Aluminium can be recycled indefinitely without losing its properties.
Name one use of medium carbon steel.
Name one use of medium carbon steel.
_____ is a silvery white non-ferrous metal often used to plate steel cans.
_____ is a silvery white non-ferrous metal often used to plate steel cans.
Match the following non-ferrous metals with their primary characteristics:
Match the following non-ferrous metals with their primary characteristics:
Which characteristic is NOT true for medium carbon steel?
Which characteristic is NOT true for medium carbon steel?
Non-ferrous metals are magnetic and contain iron.
Non-ferrous metals are magnetic and contain iron.
What is the primary use of zinc in construction?
What is the primary use of zinc in construction?
A common alloy of copper and zinc is called _____ .
A common alloy of copper and zinc is called _____ .
Match the following alloys with their composition:
Match the following alloys with their composition:
Flashcards
Cast Iron
Cast Iron
A type of iron with a carbon content of 2.4-4%. It is known for being hard but brittle, making it suitable for casting into intricate shapes.
Low Carbon Steel (Mild Steel)
Low Carbon Steel (Mild Steel)
A type of steel containing a low percentage of carbon (0.05-0.3%). It exhibits high tensile strength, making it a versatile material.
High Carbon Steel
High Carbon Steel
A type of steel containing a higher percentage of carbon (0.6-1.5%). This results in increased hardness and strength compared to low carbon steel.
Ferrous Metal
Ferrous Metal
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What is the chemical symbol for Iron?
What is the chemical symbol for Iron?
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Duralumin
Duralumin
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Brass
Brass
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High Speed Steel
High Speed Steel
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Metal Packaging
Metal Packaging
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Malleability
Malleability
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Medium Carbon Steel
Medium Carbon Steel
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Steel Production
Steel Production
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Alloy
Alloy
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Stainless Steel
Stainless Steel
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Aluminum (Aluminium)
Aluminum (Aluminium)
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Tin
Tin
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Copper
Copper
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Zinc
Zinc
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Study Notes
Metals Theory
-
Ferrous Metals: These metals contain iron, ferrite, or other substances like carbon. Most are magnetic
- Low carbon steel (mild steel): Alloy of iron and 0.05-0.3% carbon.
- Cast iron: Carbon content of 2.4-4%, making it hard but brittle in thin sections. Use: kitchen pots and pans, machine bases.
- Medium carbon steel: Similar to mild steel but doesn't rust easily and keeps an edge well. Use: Tools, blades, scissors.
- High carbon steel: Alloy of iron and 0.6 - 1.5% carbon.
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Non-ferrous Metals: These do not contain iron and are not magnetic
- Aluminum: Extracted from bauxite ore, 100% recyclable, light-weight, soft, ductile, malleable, good conductor, corrosion resistant, but difficult to weld. Uses: Pots, pans, car bodies.
- Copper: Light reddish-brown, polishes well, oxidizes to a green/silvery color. Malleable, ductile, good conductor, corrosion-resistant, easily joined by soldering. Uses: Plumbing supplies, electrical wire, roofing.
- Tin: Silvery white, often plated onto steel. Soft, ductile, malleable, corrosion-resistant, low melting point, good electrical conductor. Uses: Food cans (plating), soft solder, bronze.
- Zinc: Silvery grey with a bluish-white hue, matt finish. Fair electrical conductivity, malleability, and ductility; improved when alloyed with other metals. Uses: Galvanizing steel (preventing rust), galvanized screws.
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Alloys: Mixtures of two or more pure metals, designed to enhance properties
- Stainless steel: Alloy of carbon steel with 13% chromium and 8% nickel. Silver hue, resists rust. Uses: Cutlery, kitchen equipment, medical equipment.
- Brass: Alloy of 65% copper and 35% zinc. Yellowish gold, oxidizes to dark brown. Malleable, easy to cast and machine, low friction. Uses: Musical instruments, plumbing, door handles, boat fittings.
- Duralumin: Alloy of 4% copper, 1% magnesium and manganese. Similar to aluminum, very lightweight and strong, ductile, malleable, excellent machining characteristics, but work-hardens (becomes hard and brittle). Uses: Aircraft parts, vehicle parts.
- High Speed Steel: Varies depending on combination of metals. Able to withstand high temperatures during machining, keeps a cutting edge well. Use: Cutting tools (drill bits, cutters, taps).
Recycling Ferrous Metals
- More environmentally friendly.
- Requires 75% less energy to recycle steel.
- Easy to sort using electromagnets.
- Approximately 50% of steel is recycled.
Metals in Commercial Packaging
- Advantages:
- Added security (tamper-proof).
- Variety of standard sizes.
- Embossing or de-bossing capabilities.
- Direct printing or labeling.
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