Prominent Alloy Steels

1. Silicon Steel
2. Silicon Manganese steel
3. Nickel Steel
4. Chrome-Nickel Steel
5. Chrome-Vanadium Steel
6. Molybdenum Steel
7. Chrome-Molybdenum Steel
8. Chrome Steel
9. Manganese Steel
10. Tungsten Steel
11. Vanadium Steel
12. Cobalt Steel

1. Silicon steel:

          Silicon steel contains C 0.10%, Mn 0.60% and Si 1.00%.   

• Silicon imparts strength and fatigue resistance and improves electrical properties of steel
• This steel is also called silicon structural steel. It is stronger than carbon steel of equal ductility.

   2.    Silicon - Manganese Steel:

           It contains C 0.40% -0.55%, Si 0.04% -1.8%, Mn 0.9 - 1.0%

• This type of steel is used for springs in the hardened and tempered condition (55 Si 2 Mn 90 Steel), and for making punches and chisels.

  3.    Nickel Steel:

         It contains  C 0.35% and Ni 3.5%.

• It increase strength without proportionate decrease of ductility
• They are used for storage cylinders and for other low temperature applications.
• They are used for heavy forgings, turbine blades, highly stressed screws, bolts and nuts

  4.    Chrome-Nickel Steel:

         It contains  C 0.35% , Ni 1.25% , Cr 0.60%

• Chrome-nickel steel have same strength and ductility as 3.5%
• It combines the effect of nickel ( in increasing the toughness and ductility) and chromium ( in improving hardenability and wear resistance)

 5.   Chrome-Vanadium Steel:

       It contains  C 0.26% , Cr 0.92% and V 0.20%.

• Chromium and vanadium are added to low alloy steel to increase its hardenability and to impart a grain structure that is finer than that of the standard chromium low-alloy steels.
• It is used for making axles and shafts of automobiles, aeroplanes and locomotives.