SAE-AISI 4150 steel and PA 6 belong to fundamentally different material chemistries. SAE-AISI 4150 steel is a metal, while PA 6 is a polymeric material. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 4 material properties with values for both materials. Properties with values for just one material (35, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 4150 steel and the bottom bar is PA 6.