Warheads not causing partial damage to armor blocks.
If warheads do not outright destroy an armor block they will cause 0% damage and no deformation. The only deformation present is on blocks directly touching the armor blocks that are destroyed.
This is easily reproduced by placing a warhead (small or large) next to a brick of HA. Use your welder to check the HP of the blocks within the blast radius. You will find that blocks not destroyed will be at 100% hp.