Wrought Iron

Question 1

What is Wrought Iron?

Answer 1

Most purest form of iron (Carbon content ≤ 0.15%)

Question 2

Where is Wrought Iron manufactured?

Answer 2

Reverberatory / Puddling furnace

Question 3

What are the four main steps in manufacturing Wrought Iron?

Answer 3

1. Refining, 2. Puddling, 3. Shingling, 4. Rolling

Question 4

What is Refining in Wrought Iron manufacturing?

Answer 4

The molten material is stirred continuously to form Refined Pig Iron (Refined PI)

Question 5

What is Puddling in Wrought Iron manufacturing?

Answer 5

The process in which Pig Iron is converted to Wrought Iron

Question 6

Where does the Puddling process take place?

Answer 6

Reverberatory / Puddling furnace

Question 7

What are the white spongy balls formed at the end of the puddling process called?

Answer 7

Puddle balls

Question 8

What is Shingling in Wrought Iron manufacturing?

Answer 8

Process of removal of impurities by forging the balls

Question 9

What is the end product after shingling called?

Answer 9

Bloom

Question 10

What happens during the Rolling process in Wrought Iron manufacturing?

Answer 10

The bloom is passed through rollers to form Wrought Iron bars (WI bars)

Question 11

What is an alternative method for Wrought Iron manufacturing?

Answer 11

Aston’s process

Question 12

What are common defects in Wrought Iron?

Answer 12

Cold short
Red short

Question 13

What is ‘cold short’ in the context of Wrought Iron defects?

Answer 13

It is brittle at cold conditions and workable at high temperatures

Question 14

What is the cause of cold shortness in Wrought Iron?

Answer 14

Due to the presence of phosphorus

Question 15

What is ‘red short’ in the context of Wrought Iron defects?

Answer 15

Brittle under red heat, workable at cold conditions.

Question 16

What causes red shortness in Wrought Iron?

Answer 16

Due to the presence of sulphur.

Question 17

Is Wrought Iron suitable for welding?

Answer 17

Not suitable for welding.

The properties of wrought iron make it difficult to weld effectively.

Question 18

What is the fusing temperature of Wrought Iron?

Answer 18

1500°C

Question 19

What is the specific gravity of Wrought Iron?

Answer 19

7.8.

.

Question 20

What are some key mechanical properties of Wrought Iron?

Answer 20

• High tensile strength
• Can be forged
• Can be welded
• Malleable
• Ductile
• Tough

Question 21

What are some other characteristics of Wrought Iron?

Answer 21

• Can be used for making temporary magnets
• Corrosion resistant
• Fuses with difficulty and hence not used for casting