1.0 Materials - Metals

Question 1

What is the difference between ferrous metals and non-ferrous metals?

Answer 1

Ferrous metals contain Iron, are magnetic and can rust. Non-ferrous metals are not.

Question 2

Name at least 3 non ferrous metals.

Answer 2

Aluminium, Copper, Lead, Zinc and Tin

Question 3

Name 2 common ferrous metals.

Answer 3

Iron, steel.

Question 4

Name 3 non ferrous alloys.

Answer 4

Brass, Bronze and duralumin

Question 5

Stainless steel, High speed steel and Die (tool) steel all come under what category?

Answer 5

Ferrous alloys.

Question 6

Mild steel is a ferrous metal. What are its properties?

Answer 6

Ductile, tough, easy to form and weld. Used in nuts, bolts and screws.

Question 7

High carbon steel is a ferrous metal. What are its properties?

Answer 7

Hard and brittle. Good thermal and electrical conductivity. Used in tools - screwdrivers and chisels.

Question 8

Cast iron is a ferrous metal. What are its properties?

Answer 8

Can be brittle if thin. Can be cast in a mold. Used in manhole covers and vices.

Question 9

Aluminium is a non ferrous metal. What are some of its properties?

Answer 9

Lightweight and malleable, yet strong. Corrosion resistant. Used in bicycle frames.

Question 10

Copper is a non ferrous metal. What are some of its properties?

Answer 10

Good conductor of electricity. Very malleable. Turns green when oxidised. Used in electrical wiring.

Question 11

Zinc is a non ferrous metal. What are some of its uses?

Answer 11

Good heat conductivity. Used for galvanising (protecting metals such as steel)

Question 12

Gold is a non ferrous metal. What are some of its properties?

Answer 12

Malleable, dense and very unreactive. Used in jewelry.

Question 13

Silver is a non ferrous metal. What are some of its properties?

Answer 13

Corrosion resistant, soft and malleable when heated. Used in jewelry.

Question 14

Titanium is a non ferrous metal. What are some of its properties?

Answer 14

Strong, lightweight and good strength. (used in drill bits)

Question 15

Nitinol is a non ferrous alloy. What are some of its properties?

Answer 15

It is a shape memory alloy. Nickel and titanium.

Question 16

Brass is a non ferrous alloy. What are some of its properties?

Answer 16

Casts well, darkens when oxidised. Taps, screws and locks. Copper and zinc.

Question 17

Duralumin is a non ferrous alloy. What are some of its properties?

Answer 17

It has good strength and machinability. Used in wire, bars and rods. Aluminium and copper.

Question 18

Pewter is a non ferrous alloy. What are some of its properties?

Answer 18

Malleable, ductile. Used in decorative items. Tin, antimony and copper (+ sometimes bismuth) (+ sometimes silver)

Question 19

Stainless steel is a ferrous alloy. What are some of its properties?

Answer 19

Hard, tough and good corrosion resistance. Used in Cutlery and surgical equipment. Steel, chromium, nickel and magnesium.

Question 20

High speed steel is a ferrous alloy. What are some of its properties?

Answer 20

Works for a long time without losing its hardness. Used In power equipment. Carbon steel + tungsten.

Question 21

Die (tool) steel is a ferrous alloy. What are some of its properties?

Answer 21

Hardness, abrasion resistant. Used in tools - Chisels, drill bits. Tungsten, chromium, vanadium and molybdenum.