Sulphur in steel | EXAMIANS

Engineering Materials
Sulphur in steel

Acts as deoxidiser

Lowers the toughness and transverse ductility

Decreases tensile strength and hardness

Reduces the grain size

Acts as deoxidiser

Lowers the toughness and transverse ductility

Decreases tensile strength and hardness

Reduces the grain size

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Engineering Materials
Steel contains

80% or more iron

Elements like phosphorus, sulphur and silicon in varying quantities

50% or more iron

Alloying elements like chromium, tungsten nickel and copper

80% or more iron

Elements like phosphorus, sulphur and silicon in varying quantities

50% or more iron

Alloying elements like chromium, tungsten nickel and copper

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Engineering Materials
The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is

1050°C

770°C

910°C

Below recrystallization temperature

1050°C

770°C

910°C

Below recrystallization temperature

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Engineering Materials
In a hardening process, the hypo-eutectoid steel is

Heated from 30°C to 50°C above the upper critical temperature and then cooled suddenly in a suitable cooling medium

Heated from 30°C to 50°C above the upper critical temperature and then cooled slowly in the furnace

Heated below or closes to the lower critical temperature and then cooled slowly

Heated from 30°C to 50°C above the upper critical temperature and then cooled in still air

Heated from 30°C to 50°C above the upper critical temperature and then cooled suddenly in a suitable cooling medium

Heated from 30°C to 50°C above the upper critical temperature and then cooled slowly in the furnace

Heated below or closes to the lower critical temperature and then cooled slowly

Heated from 30°C to 50°C above the upper critical temperature and then cooled in still air

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Engineering Materials
Malleable cast iron

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

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

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

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

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

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

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
The crystal structure of brass is

H.C.P.

Orthorhombic crystalline structure

C.C.

F.C.C.

H.C.P.

Orthorhombic crystalline structure

C.C.

F.C.C.

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Engineering Materials

Engineering Materials Sulphur in steel

Engineering Materials Steel contains

Engineering Materials The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is

Engineering Materials In a hardening process, the hypo-eutectoid steel is

Engineering Materials Malleable cast iron

Engineering Materials The crystal structure of brass is

Engineering Materials
Sulphur in steel

Engineering Materials
Steel contains

Engineering Materials
The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is

Engineering Materials
In a hardening process, the hypo-eutectoid steel is

Engineering Materials
Malleable cast iron

Engineering Materials
The crystal structure of brass is