One of the first questions that must be determined in a motion to suppress hearing is whether the defendant had standing to object to the search. This is a question of legal or equitable ownership and is determined under the doctrine of standing.
In contrast to Rock types, Steel types can hold up to many attacks because of their typically high Defense. Due to their high capability of defending, all three of the Steel type's weaknesses (Fighting, Ground and Fire) are often used against this type. Prior to Generation VI, Steel was the only type that did not have a neutral type match-up with any of the seventeen existing types, considering both the offense and defense of both types. 2  In Generation VI, it was changed so that Steel no longer resisted Dark-or Ghost-type moves.
However, if the steel was heated to a high enough temperature, as could be caused by a thermitic attack, and then if the attacked area was persuaded by a small concussive charge to move aside then what we saw would match the event. As you say, steel fails under heat, but not from an office desk and a hat-stand burning.