Plasma cutting galv

[leadpig]

Can you use plasma on galv box section.
I have 9 mitre cuts on 4/5mm 100mm square ️ steel.
My 5 inch grinder was not happy at all.
Or would I be better of trying to get hold of a portable band saw

 

[Bornfree]

9" grinder with thin discs will slice that like a hot knife through butter.

 

[Bladevane]

On the basis that plasma vaporises the material being cut I would strongly suggest you do not use plasma to cut galvanised unless you have exceedingly efficient extraction that filters out particles rather than just dumping them onto your neighbours or inside your workshop.

 

[James1979]

Both valid points.

The other thing is that the plasma cut edge is covered in dross and welds like crap. Full of porosity. You need to get it back to good steel so allow for that in your cut.

As bornfree says, a 9” disk is the way for a few cuts.

Do you know anyone at a local fab place who’d stick it in the bandsaw after work for beer tokens?

 

[premmington]

Both valid points.

The other thing is that the plasma cut edge is covered in dross and welds like crap. Full of porosity. You need to get it back to good steel so allow for that in your cut.

As bornfree says, a 9” disk is the way for a few cuts.

Do you know anyone at a local fab place who’d stick it in the bandsaw after work for beer tokens?

+1 for a 9"

Galv' will self heal up to a certain thickness - if cut with disc - not a plasma cutter (don't ask me why? or how?)

 

[MetalMonkey]

I've found a portable bandsaw is the easiest, quickest, neatest and most accurate free-hand way of cutting thin box so far.
Probably not really a viable option for 9 cuts though if you don't have one.

 

[RWD3M]

Can you use plasma on galv box section.
I have 9 mitre cuts on 4/5mm 100mm square ️ steel.
My 5 inch grinder was not happy at all.
Or would I be better of trying to get hold of a portable band saw

What's wrong with a hacksaw?!!!

 

[leadpig]

Well carriers forgot to ship my compressor ffs plasma was no longer a option, so used my mains metabo 5" in the end, handled it way better than the cordless dewalt lol

 

[leadpig]

Carefully removing the galv near the cut would be recommended, before plasma cutting!

A bandsaw would be more accurate than anything hand-held. Could still be portable, of course. Mine is.

Keeping my eye out for a portable band saw. Was going to get the dewalt xr but no where near big enough
I have a feeling I will be making a few more stoves lol

 

[Hitch]

5" grinder would be my choice on that every time.

Plasma would be my last option, maybe second to last, last being one of those wooden fork things from from chippy.