Mythological characters that can be found on the periodic table include Tantalus (Tantalum, ta) and his daughter Niobe (Niobium, Nb), and Promethius (Promethium, Pm).
元素表中可以找到神话中的角色，比如坦塔罗斯(钽)和他的女儿尼俄伯(铌)，还有普罗米修斯(钷)。
The wear resistance of niobium alloyed cast iron was studied. Result shows that the wea resistance of cast iron containing 0.15-0.4%nb is about 5 times higher than gray iron.
用铌中间合金处理铁水，对所浇注的试样作了耐磨性试验研究表明，当含铌量为0.15 ~ 0.4%时，铌铸铁较普通铸铁耐磨性提高5倍左右。
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