The lower critical temperature

Engineering Materials
The lower critical temperature

Depends upon the rate of heating

Is same for all steels

Decreases as the carbon content in steel increases

Increases as the carbon content in steel increases

Depends upon the rate of heating

Is same for all steels

Decreases as the carbon content in steel increases

Increases as the carbon content in steel increases

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Engineering Materials
Aluminium bronze contains aluminium and copper in the ratio of

0.47916666666667

2.1180555555556

2.5277777777778

40 : 60

0.47916666666667

2.1180555555556

2.5277777777778

40 : 60

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Engineering Materials
Gamma iron exits at following temperature

Room temperature

Near melting point

Between 1400°C and 1539°C

Between 910°C and 1400°C

Room temperature

Near melting point

Between 1400°C and 1539°C

Between 910°C and 1400°C

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Engineering Materials
When low carbon steel is heated up to lower critical temperature

The grain size first increases and then decreases very rapidly

The grain size increases very rapidly

There is no change in grain size

The average grain size is a minimum

The grain size first increases and then decreases very rapidly

The grain size increases very rapidly

There is no change in grain size

The average grain size is a minimum

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Engineering Materials
Steel containing ferrite and pearlite is

Hard

Hard and tough

Tough

Soft

Hard

Hard and tough

Tough

Soft

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Engineering Materials
Malleable cast iron

Is produced by annealing process. It is soft, tough, and easily machined metal

Contains 1.7 to 3.5% carbon in Free State and is obtained by the slow cooling of molten cast iron

Is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable

Is produced by small additions of magnesium (or cerium) in the ladle. Graphite is in the nodular or spheroidal form and is well dispersed throughout the material

Is produced by annealing process. It is soft, tough, and easily machined metal

Contains 1.7 to 3.5% carbon in Free State and is obtained by the slow cooling of molten cast iron

Is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable

Is produced by small additions of magnesium (or cerium) in the ladle. Graphite is in the nodular or spheroidal form and is well dispersed throughout the material

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Engineering Materials

Engineering Materials The lower critical temperature

Engineering Materials Aluminium bronze contains aluminium and copper in the ratio of

Engineering Materials Gamma iron exits at following temperature

Engineering Materials When low carbon steel is heated up to lower critical temperature

Engineering Materials Steel containing ferrite and pearlite is

Engineering Materials Malleable cast iron

Engineering Materials
The lower critical temperature

Engineering Materials
Aluminium bronze contains aluminium and copper in the ratio of

Engineering Materials
Gamma iron exits at following temperature

Engineering Materials
When low carbon steel is heated up to lower critical temperature

Engineering Materials
Steel containing ferrite and pearlite is

Engineering Materials
Malleable cast iron