| jerrys |
i think the hardness is just determined by the marerial
paizo.com/pathfinderRPG/prd/additionalRules.html#_table-7-13-substance-hard ness-and-hit-points
hit points, there's also a table there
paizo.com/pathfinderRPG/prd/additionalRules.html#_table-7-12-common-armor-w eapon-and-shield-hardness-and-hit-points
-- if your thing is not on the list you might have to wing that a bit.
note in the footnote there - magic weapons and armor have additional +2 hardness per point of enhancement bonus. so e.g. a +3 mithril armor (15+6=21 hardness) is good because it doesn't let the adamantite guy completely blast through it.
I don't think they have break DCs, but that is interesting.