different steel types

[oconeedan]

I was looking at steel supplier, they offer 1095 in 3 different forms, I was wondering what the difference is.
Hot rolled P&O spheroidized
Cold rolled spheroidezed
Hot rolled as rolled

Thanks in advance. Dan

 

[mete]

P&O ? Pickled and oiled ? scale is removed by acid pickling and oiled to prevent rust.

Hot rolled would have a pearlite structure suitable if you will forge it but it's difficult to machine or grind.

Spheroidized is a structure where the carbide is spheroidized and it is easy to machine and grind.
Cold rolled has tighter dimensions [than hot rolled] as it is rolled after spheroidizing to desired dimensions.

 

[Darrin Sanders]

If you're gonna forge it get the cheapest. If you're gonna do stock removal get the cold rolled and spheroidized annealed. CRA (cold rolled annealed) will have a nice clean finish and save a lot of time for stock removal.

 

[oconeedan]

Thanks!
Dan