Mar 31, 2008 #1 nrgent Mechanical Joined Mar 28, 2008 Messages 3 Hi, I would like to know the differace between 4140 to E-4140. What the refers to? Thx
Mar 31, 2008 #2 swall Materials Joined Sep 30, 2003 Messages 2,767 Location US The "E" means it is electric furnace melted rather than basic oxygen furnace melted. Upvote 0 Downvote