Sentence:  Stowey Rummel was internationally famous , a crafter of a genuine Americana in foreign eyes , an original designer whose inventive childishness with <WSD>steel</WSD> and concrete was made even more believably sincere by his personality . 
Meaning of the word marked with <WSD> tags:  an alloy of iron with small amounts of carbon; widely used in construction; mechanical properties can be varied over a wide range