Hikari Corporation

Last time, I talked about the fact that the hardness and strength of steel change depending on the amount of carbon.

In fact, there are other substances that affect the properties of steel besides carbon.

This time I will introduce you.

 

There is something called "five elements of steel".

Carbon, silicon, manganese, phosphorus and sulfur.

These are always written on the "mill sheet".

A "mill sheet" is like a certificate of quality of steel.

 

① Carbon: Determines the hardness of steel. Without this, it wouldn't be steel.

I will briefly introduce each of them.

② Silicon: Increases strength or is used as a deoxidizer.

③ Manganese: Makes it easier to burn and gives it tenacity.

④ Phosphorus: Harmful to steel. It makes steel brittle when it's cold.

⑤ Sulfur: This is also harmful to steel. Makes steel brittle when heated to red.

 

　　　　　　　　

 

These, in large and small quantities, affect the properties of steel, for better or for worse.