DME University

How Is Phosphorus Used Within Steel Alloys?


Phosphorus is a highly reactive, poisonous, non-metallic element occurring naturally in phosphates. It is used in safety matches, pyrotechnics, incendiary shells, fertilizers, glass, as well as in steel.

Effects of Phosphorus in steel alloys
Phosphorus is only used in small amounts, less than .05%, in carbon steels because it will affect the shock and vibration resistance of the steel. It is used primarily to eliminate blow holes that may develop during the smelting process. Phosphorus can also help reduce shrinkage and improves machinability.

  • (+) Eliminates blow holes.
  • (+) Improves machinability.
  • (-) Decreases shock and vibration resistance.



Page 8 of 30

Share On Linkedin