topic 1.2 Flashcards
(27 cards)
What are ferrous metals?
Metals that contain iron, usually magnetic, and prone to rust
Examples include mild steel, medium carbon steel, high carbon steel, and cast iron.
What is the typical use of mild steel?
Car bodies, nuts/bolts, engineering
Mild steel is tough, ductile, and malleable but has poor corrosion resistance.
What properties characterize medium carbon steel?
Harder than mild steel, less ductile
Commonly used for garden tools and springs.
What is high carbon steel also known as?
Tool steel
It is very hard, brittle, and strong, typically used for cutting tools and drills.
What are the typical uses of cast iron?
Engine blocks, manhole covers
Cast iron has a hard skin and a brittle core with good compressive strength.
What are non-ferrous metals?
Metals that do not contain iron, non-magnetic, and resistant to corrosion
Examples include aluminium, copper, zinc, and tin.
What is a typical use of aluminium?
Aircraft, cans, window frames
Aluminium is lightweight, corrosion-resistant, and a good conductor.
What properties make copper valuable for wiring?
Excellent conductor, ductile, malleable
These properties contribute to its widespread use in electrical applications.
Fill in the blank: Zinc is known for its _______ and low melting point.
corrosion-resistance
What is the composition of stainless steel?
Iron + chromium + nickel
It is tough, hard, corrosion-resistant, and shiny, used for cutlery and kitchenware.
What are the typical uses of brass?
Instruments, taps, fittings
Brass is made of copper and zinc and is known for its malleability and good acoustic properties.
What properties characterize bronze?
Tough, corrosion-resistant
Bronze is an alloy of copper and tin, commonly used for bearings, medals, and sculptures.
What is duralumin composed of?
Aluminium + copper + manganese
It is strong, lightweight, and hard, making it suitable for aircraft parts.
What does strength mean in relation to metals?
Withstands applied force without breaking or deforming
What is hardness in metals?
Resists scratching, wear, and indentation
What does toughness refer to in metals?
Absorbs sudden impact without fracturing
What is malleability?
Can be hammered or pressed into shape without cracking
What does ductility mean in metals?
Can be drawn out into thin wire
What is conductivity in terms of metals?
Transfers heat and electricity, especially in copper and aluminium
What does corrosion resistance indicate?
Resists rust or decay due to environmental exposure
What is one method of enhancing metal performance?
Surface finishes
Examples include painting, galvanising, anodising, and electroplating.
Fill in the blank: Alloying metals changes their _______.
properties
What is the purpose of a tensile test?
Measures how much force metal can take when stretched
What does a hardness test measure?
Resistance to indentation/scratching
