[Rob. Smith]

The trouble with stainless is that it work hardens and the flare face is exceptionally hard....thus it takes excessive force to "seat" the flare to the fitting..the bundy tube and zink coated stuff are soft enough to mould and comply with the flare fittingface....therefore not needing a great force to seat. I might be wrong but stainless can only be flared once...a double flare is not possible as it becomes too hard and cracks. That's what I found when making hydraulic lines for a power tilt on an outboard. The stainless looked fantastic all polished up but leaked at nearly every joint. I fixed it with soft copper "washers" but this was just a tilt drive not a brake line that your life depends on.