I need to braze together some 300 series stainless steel tubing to a 300 series stainless header.  The tubing will be exposed to sulfurized oil used in a machining application.  Several suppliers have suggesed using Bag-24 brazing rod (50% Ag, 20%Cu, 28%Zn, 2% Ni).   No one can tell me if this brazing material will hold up to the sulfur in the oil.  I know the sulfur in the oil will eat through pure copper very quickly.  This is a production application, so I really would rather not Tig weld each tube (very slow). 

Any suggestions on where to find a rating?  Any suggetions on a better material?

Thanks in advance,

Joe K.