Delaying Fajr prayer beyond the proper time
Question

                I always pray Fajr namaz at 7 in the morning, so do I have to pray sunnath too? or only faraz?
Praise be to Allah.
    If you are praying Fajr prayer before the sun rises, then the 
    Sunnah in your case is to pray the regular Sunnah of Fajr which is two 
    rak’ahs. If you miss Fajr and do not wake up until after the sun has risen, 
    then you should pray Sunnah and then Fard (obligatory prayer). But if you 
    always delay Fajr prayer until after the sun has risen, this is a serious 
    problem. In this case, before you ask about the Sunnah prayer you have to 
    pause and ask yourself what you will say when you stand before Allaah on the 
    Day of Resurrection, and He calls you to account for neglecting Fajr 
    prayer. 

    See also question no. 266.