Some Special Steels



Steel Composition Properties Uses
Stainless Steel Fe=75%

Cr=18%

Ni=8%

C=1%

Have very high chemical resistance. in using ornamental pieces, cutleries, utensils, etc.
Manganese Steel Fe=86%

Mn=135

C=1%

Very hard and resistant to wear and tear. Railway tracks, safes, safety helmets.
Tungsten Steel Fe=94%

W=5%

C=1%

Very hard. Many high speed cutting tools.
Invar Fe=64%

Ni=36%

Have very small coefficient of linear expansively. in making clock hands , pendulum rods, meter scales, etc.
Nickel Steel Fe=96-98%

Ni=2-4%

Resistant to corrosion and is elastic. wire cables, gears, drive shafts, etc.
Perm alley Fe=21%

Ni=78%

C=1%

Strongly magnetized by electric field and gets demagnetized when current is switched off. used in making electromagnet.