Tactics: The Centurion Devastator Squad have a decent statline for a heavy infantry unit. ... This actually gives each centurion a decent level of anti-infantry firepower. At range, a squad of 3 Centurions will put out 18 Heavy Bolter shots and 18 Bolter shots (going up to 36 Bolter shots at rapid fire range).

Do Centurions get bolter discipline?

Don't forget centurions lost the bolter discipline rule as well which lowers their hurricane bolter firepower.

Can Blood Angels use centurions?

You take the Centurions as part of an Auxiliary support detachment for 2CP. They can't have the Blood Angels Keyword nor gain any detachment abilities.