We have a crew doing an field project out-of-town and they have to weld 7 ga. 304 SS to 304 using MIG and tri-mix gas.  Unfortunately someone packed the wrong wire, they took 309L instead of 308.  Should they proceed with the 309L wire or should we find the correct wire and switch?  Not a pressure or structural weld, I'm just worried about cracking of the welds.

Advice on this would be appreciated!