No, the times for tube processing will not work for tray processing. When developing in tubes, the film is under constant agitation (unless you use stand development - never used that, can't really comment on it) as opposed to mild agitation with tray development.

You would therefore have to increase the tray development time to obtain the same contrast. I would suggest 20% as a starting point. My times for developing HP5 in P-HD EI 320 20C was something like 13 minutes - try for 15 minutes in trays, and adjust accordingly.