It's certainly a possibility that Hank will suspect him eventually, and even inevitable, but I think at this point Hank doesn't consider Walt a suspect at all. Everything in his demeanor speaks to that. Walt keeps doing and saying dumb shit and slowly leading Hank to him, so there's no doubt Hank will eventually catch a sniff. But particularly now, Hank is purely focused on Gus, who he is convinced is Heisenberg.
Later on, he'll start putting things together - Walt being a chemistry genius, Walt having cancer and perhaps wanting to raise money, the missing lab equipment from the school, the Dodge Challenger, etc. But right now Hank isn't putting all those connections together at all, since he's got tunnel vision due to Gus.