Material Grouping - Metals (2)

Question 1

Ferrous

Answer 1

The presence of Iron. Divided into groups called “Alloys” based on their chemical make-up.

Question 2

Non-Ferrous

Answer 2

The lack of Iron (Aluminium + Aluminium Alloys)

Question 3

Alloy

Answer 3

A substance composed of two or more elements, where one element is metal.

Question 4

Wrought Iron

Answer 4

High purity iron and Slag

Carbon content = >0.08%

Question 5

Cast Iron

Answer 5

Carbon + Iron

Carbon content = 3-4%

Question 6

Steel

Answer 6

Carbon + Iron

Carbon content = >2%

Question 7

Plain Carbon Steel

Answer 7

Carbon content = 1.8% + other minor elements

Question 8

High Carbon Steel

Answer 8

Carbon content = 0.5-1.6%

Strong, holds shape

Question 9

Medium Carbon Steel

Answer 9

Carbon content = 0.25-0.5%

Ductile, strong, good wear, heat-treatable

Question 10

Low Carbon Steel

Answer 10

Carbon content = up to 0.25%

Maximum Ductility and strength, hardened by Cold-Working, Carburizable

Question 11

Low-Alloying Steel

Answer 11

Alloy = 2-10% , often less than 8%

High temperature, good corrosion resistance, formable, duel phase.

Question 12

High-alloying Steel

Answer 12

Alloy = <8%
Corrosion resistant, heat-resistant, wear-resistant, Tool-Steel, Stainless-Steel, Austenitic Manganese, Special Purpose Steel.

Question 13

Stainless Steels

Answer 13

Available in Cast Iron + Wrought form. Usually no less than 50% iron.

• Ferritic (BCC)
• Martensitic (BCC)
• Austenitic (BCC)
• Duplex
• Precipitation Hardening

Question 14

Tool-Steels

Answer 14

Originally High-Carbon Steels, now mainly highly complex steels are used.

Question 15

Cast-Steels

Answer 15

Mechanical Properties are lower than their Wrought counterpart of the same composition. Lack the directional properties that Wrought-Steels have.