Hot Rolled Steel Classification
Is Hot rolled steel considered a mild steel ?
Amd is there a recomended TPI for cutting it with a horizontal saw ?
No-Material shape and thickness is determining factor. Rule of thumb is minimum of three teeth in the cut. Fine pitch for tubing, coarse for chip clearance in solids.
The Yahoo bandsaw group have a printable speed label for bandsaws.
Hot rolled steel is often taken to mean just a mild steel. But, all hot rolled really means is that the material just hasn't been pickled to remove the bark.
For example, I've bought 4140 in both hot rolled and pickled and cold rolled rolled conditions. So you do need to know what the material is.
I have used a variable pitch blade on my bandsaw for several years now and it seems to solve the problem of changing blades for thick or thin wall materials. I think mine is a 10-14 variable pitch. I cut all alloys with it and it lasts for years.
Originally Posted by dalee100
I have a piece that you can have fun with...... looks innocent enough, but if you try to machine it it will eat cutters if you give it half a chance. Let anything think about rubbing and that spot is instantly too hard for carbide to cut.
I don't think it is 1020
Yep, hot rolled is just what it says on the tin...rolled as hot. But yeah, usually it implies mild steel (S235, S355).
Tip: If you happen to cut tubing in the bandsaw, put a small flat bar behind the tube in the vise so that the blade always has 3-5 teeth in the cut Doesn't slow down that much and keeps the blade in good condition.