Does mercury amalgamate with Brass or Steel?

Does mercury amalgamate with Brass & Steel ?

Details: I am designing a micro pump to dispense mercury in micro quantities ($\mathrm{300-700}\ \pu{mg}$). I am planning to use 2 check valves with syringe to suck mercury from a mercury reservoir and push it for dispensing. The problem is that all the high quality check valves are mostly Brass & I am not sure if mercury amalgamates with it.