Metals (Types & Properties)

Question 1

composed mainly of iron with small additions of other metals and substances

Answer 1

Ferrous Metals

Question 2

• ferrous metal
• iron + traces of silicate
• easily worked; tough and ductile
• uses: decorative works (screens & gates)

Answer 2

Wrought Iron

Question 3

• ferrous metal
• iron + small amounts of carbon, silicon, sulfur; does not rust easily
• uses: cylinder blocks, piston rings, vice/vise bodies, fire backs, manhole covers

Answer 3

Cast Iron

Question 4

• ferrous metal
• iron + 0.3% carbon
• cheap, easy to form, ductile, easily recycled.
• uses: general purpose metal used in bar, rods,
sheets, rolled section; nuts, bolts, screws

Answer 4

Mild Steel

Question 5

• ferrous metal
• steel + chromium and nickel
• corrosion resistant; no need to apply any finish.
• uses: cutlery, furniture frames

Answer 5

Stainless Steel

Question 6

• ferrous metal
• addition of different elements (nickel, chromium, copper & manganese) to molten steel
• uses: saws, chisels, plane irons, scissors, knives, hammer heads, springs

Answer 6

Tool and Alloy Steel

Question 7

• ferrous metal
• high resistance to corrosion
• uses: making sheet steel and metal
lathe

Answer 7

Copper-bearing Steel

Question 8

contains little to no iron

Answer 8

Non-ferrous Metal

Question 9

• non-ferrous metal
• lustrous, silver-white, magnetic, lightweight;
• super conductor, good thermal
 & electrical conductivity; less maintenance
• uses: kitchen utensils, furniture and fittings

Answer 9

Aluminum

Question 10

• non-ferrous metal
• pure metal; reddish-brown metal; highly ductile and malleable
• excellent workability; good conductor of heat & electricity
• uses: hot water piper, electrical parts, decorative work

Answer 10

Copper

Question 11

• non-ferrous metal
• pure metal; soft, malleable, heavy metal
• toxic; low melting point
• uses: plumbing, flashings, container linings, weighting objects

Answer 11

Lead

Question 12

• non-ferrous metal

- pure metal; uses; substitute for lead in flashings and linings; plating

Answer 12

Zinc

Question 13

• non-ferrous metal
• pure metal; lustrous white, soft and malleable
• low melting point; unaffected by exposure to air; does not tarnish easily
• uses for: base for alloys and coating for mild steel.

Answer 13

Tin

Question 14

protective coating of zinc on steel to prevent rusting

Answer 14

Galvanization

Question 15

combination of 2 or more metals and other substances

Answer 15

Alloys

Question 16

• alloy
• copper + 12% tin + other metals
• dull gold color; harder than copper
• uses: pump units, marine fittings, gears and bearings

Answer 16

Bronze

Question 17

• alloy
• aluminum + copper + other metals; susceptible to corrosion
• uses: shelving systems, chair legs, pulleys, bolts, rivets, cladding

Answer 17

Duralumin

Question 18

• alloy
• copper + zinc
• uses: cabinet hardware, screws, decorative work

Answer 18

Brass

Question 19

• property of metal

- slow hardening process; takes place in certain alloys

Answer 19

Age-hardening

Question 20

• property of metal

- ability to break under a sharp blow

Answer 20

Brittleness

Question 21

• property of metal

- capacity to transmit heat and electricity

Answer 21

Conductivity

Question 22

• property of metal

- ability to be stretched into fine wire without fracture

Answer 22

Ductility

Question 23

• property of metal

- ability to regain original shape after deformation

Answer 23

Elasticity

Question 24

• property of metal

- property of becoming liquid when heated

Answer 24

Fusibility

Question 25

• property of metal

- resistance to deformation

Answer 25

Hardness

Question 26

• property of metal

- capacity to be extended in all directions without fracturing by rolling, hammering or beating

Answer 26

Malleability

Question 27

• property of metal

- resistance to a pulling force

Answer 27

Tenacity or cohesion

Question 28

• property of metal

- hardening of metal white being hammered or bent

Answer 28

Work-hardening