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Can I use a 60pt carbide blades (RAS) to cut steel bar? I'm cutting a 1/2" square tube and need 4 pieces exactly the same size. I can cut it with a hacksaw, then grind it to the same size, but cutting in on my RAS would be faster and more accurate.

No. Carbide tipped blades are for use on non-ferrous metals only.
Brass, aluminum, etc.

Carbide tips are brittle -- they shatter if they hit anything steel.

Get a new hacksaw blade and tension it right. Mark the cut well and grind to fit.

Thanks. Knew I couldn't cut threaded rod, wasn't sure about tubing.

Cutoff wheel on a angle grinder.      Roly

If you are going to make a habit of this, consider a cordless portable bandsaw.  Drop hints to Santa.  They are the cats adze for work like that.

(11-27-2016, 08:42 PM)blackhat Wrote: [ -> ]If you are going to make a habit of this, consider a cordless portable bandsaw.  Drop hints to Santa.  They are the cats adze for work like that.

I have a bandsaw, what type of blade would you suggest?

(11-27-2016, 04:17 PM)Scouter Wrote: [ -> ]Can I use a 60pt carbide blades (RAS) to cut steel bar? I'm cutting a 1/2" square tube and need 4 pieces exactly the same size. I can cut it with a hacksaw, then grind it to the same size, but cutting in on my RAS would be faster and more accurate.

Porta band not a WW bandsaw 



12-14 TPI works on this saw

The make a table accessory for the saw Joe posted.  I have that saw but the table is another $250 and I haven't come across a deal on one yet

(11-27-2016, 08:27 PM)Roly Wrote: [ -> ]Cutoff wheel on a angle grinder.      Roly

+1