No, brass, like similar non ferrous metals of that type, will take 'normal' fluxes like Fluxite, Bakers soldering fluid, Sifbronze etc. You can also use traditional solders such as electricians multicore or plumbers tin/lead alloy or lead free. Make sure everything is spotlessly clean and you can solder brass to copper, steel etc - but not aluminium, naturally.
John, May 2009