Explanatory notes
… it is resistant to corrosion, hard and brittle unless very pure. Ferro‑titanium and ferro‑silicon‑titanium (Chapter 72) … making, e.g., vats, agitators, heat exchangers, valves and pumps for the chemical industry, for the desalination of … XVI or XVII ), such as helicopter rotors, propeller blades, pumps or valves. The classification of the carbide follows …