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Message: <blockquote data-quote="Treebore" data-source="post: 1501294" data-attributes="member: 10177">Some of you may enjoy looking up the history of steel making. It has been a found-lost-found again "technology" for a very long time. Of course steel has become over a 100 times stronger/durable than it was just 90 years ago. Any bridge engineers familiar with the history of metal and the evolution of bridge design?Also, the 20% rule applies under the best of conditions. Of course for simple swords and armor the metals will probably never be exposed to the stresses found in modern machines of war, such as tanks and ships, or bridges/hi-rise buildings. So the tendency to fragment under high stress conditions would never be duplicated under those (D&D) kinds of combat conditions.The rule for gold and silver is more for maintaining the color and lustre of the metal when re-cast than for any strength/durability issues.Edit: Any world with dwarves/elves in it would have a seriously altered history of metal anyways. Like thousands of more years of steel history.</blockquote>