Even fluoropolymers are no threat to these barrels, which have a protective layer of nickel-rich boron alloy
containing molybdenum and a matrix of borides and carbides.
This is probably due to the higher metal circulation, which lifts heavier boron alloy
particles to the surface.
Now, a new diluted boron alloy
is available that minimizes aluminum content and combines titanium with rare earths for greater fluidity, eliminating the nozzle-clogging problem.
Caption: The TLX structure includes six different grades of high-strength steel, including USIBOR (a boron alloyed
steel used to produce, via hot stamping, the door opening rings), 980 grade (for applications including the A- and B-pillars)