Is Austenitic 303 NACE compliant?

[awol]

I have a copy of MR0175 and section 3.5 describes Austenitic SS. But Table 1 doesn't list 303. Why? 302 and 304 is listed and OK per NACE if Rc<22 in the annealed condition.
Was it left out for a reason or just left out. I have a part to make that may see H2S service. Can I use annealed 303? Thanks for the help. -awol

 

[boo1]

Austenitic - A family of alloys containing chromium and nickel (and manganese and nitrogen when nickel levels are reduced), generally built around the type 302 chemistry of 18% Cr, 8% Ni, and balance mostly Fe. These alloys are not hardenable by heat treatment. Of these 303 is one of the most popular of all the free machining stainless steels, which has the effect of lowering slightly its corrosion resistance. But has very limited resistance to acids.

We do not use 303 at all.

The “L” grades are used to provide extra corrosion resistance after welding. The letter “L” after a stainless steel type indicates low carbon (as in 304L). The carbon is kept to .03% or under to avoid carbide precipitation.

 

[bruv]

Mcguire's answer in thread338-28402 might give you some clues why 303 doesn't appear in MR0175