Tantalum, niobium, and zirconium can resist boiling hydrobromic acid of 48%, but niobium may suffer from hydrogen embrittlement. When free bromine exists in the system, titanium can also be used.
R60702 zirconium 702 flanges
Pure hydrobromic acid is not corrosive. When 30% dilute hydrobromic acid is at room temperature, super stainless steel 904L N08904 materials are corrosive. In this state, pure titanium GR1 and titanium GR2 is a good choice.
Titanium expansion joint (Flange resistant ultimate vacuum compensator)
