If a person pray Asr salah on the time of hanafi madhab, is this haram or not?

Assalamualaikum, I actually wanted to know, is praying salah on the time of hanafi madhab Haram? I heard shiekh Assim Al Hakeem say that this is not how Prophet Muhammad SA used to pray and they used to pray on the time of other madhabs told, so will this be sinful? Edit : I want to know whether this would be haram or not because it's not the way of prophet Muhammad.