Talk:Armor/@comment-72.201.246.173-20130914051510/@comment-10343758-20130914180548

Beyond Steel Fiber rank 6 (70%), the amount of damage reduction you gain from the mod for each successive rank (7,8,9,10) decreases. It took 6 ranks to get 30% damage reduction from Steel Fiber; the next 4 ranks (rank 10) get you 40% -- a smaller increase across the spread of ranks.

However, you will still gain benefit from using Steel Fiber all the way to max rank. You don't stop gaining damage reduction -- it continues to increase, just not as fast as the earlier ranks.