Difference between "Hot-Rolled Bar" and "Hot-Rolled Billet"

[pogoGo]

If you have a square "Hot-Rolled Billet" and a square "Hot-Rolled Bar" of the same cross section dimensions, what are the actual differences between the two? Is it a question of length? Does one have more work in it than the other?

 

[SnTMan]

Well, here is one take on it. Apparently billet has received less processing than bar.

I expect we will get a more definitive answer shortly

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[r6155]

See definitions in SA-29
Regards
r6155

 

[metengr]

The difference boils down to the work reduction ratio between the two product forms. In some applications you can have strand cast bars with little work reduction needed. In other cases you have bars made from billets that are typically produced from ingots so you can have more work reduction.

 

[dhengr]

PogoGo:
A steel billet is a less worked precursor, with a larger cross-sectional sized than the finished rolled bar. The rolling process reduces the billet cross-sectional area, while increasing the length of the volume of steel. Finished bars of many sizes and shapes are made this way.

 

[r6155]

"....of the same cross section dimensions what are the actual differences between the two?

The differences are the permissible variations for dimensions is for hot-wrought carbon and alloy steel bars, not for billets. See SA-29.

Regards
r6155