On Thu, 28 Jul 2011 21:47:32 -0500, Ignoramus6004
wrote:

I bought a grill to put into the compressor that I aom converting into
a grill/pig roaster.

It is described as "stainless", but I recall that Chinese grill
stainless steel is something special.

As I may need to alter it a little bit, add tabs or drill holes, I
want to know what kind of stainless is it and what kind of welding rod
to use on it, and also, how can I drill it.

i
Chinese "anything" is a crap-shoot. Drilling stainless requires a
sharp bit, a slow cutting speed,and lots of pressure. You want the bit
to bite ALL the time. If it slides and heats, you are finished -
generally speaking.
As for welding, using the same alloy as the project works best - but
any stainless rod will likely be "good enough" since it is not
something that needs to look good close up. Best to stay with either
magnetic or non-magnetic, whichever the project is.
I'm not a professional welder - nor do I play one on TV - but I have
done some welding - including stainless - and a good friend of mine is
a real tig artist with SS.