Name

Percentage

Properties

Uses

Stainless steel

Fe = 73%, Cr = 18%,

Ni = 8% and carbon

Resists corrosion

For making utensils, cutlery and ornamental pieces.

Manganese steel

Fe = 86%, Mn = 13% and carbon

Very hard, resistant to wear and tear.

For Making rock drills, safes etc.

Tungsten steel

Fe = 94%, W = 5% and carbon

Retains hardness even at high temperatures

For making high speed cutting tools.

Invar

Fe = 64%, Ni = 36%

Practically no coefficient of expansion.

For making watches, meter scales, pendulum rods etc.

 Nickel steel

Fe = 98-96%, Ni = 2-4%

Resistant to corrosion, hard and elastic.

For making wire cables, gears, drive shafts etc.

Permalloy

Fe = 21%, Ni = 78% and carbon

Strongly magnetised by electric current, loses magnetism when current is cut off.

For making electromagnets, ocean cables etc.

Chrome steel

Fe = 98-96%, Cr = 2-4%

High tensile strength

For making axles, ball bearings and cutting tools such as files.

Alnico

Fe = 60%, Al =12%,

Ni = 20%, Co = 8%

Highly magnetic

For making permanent magnents.