How to Harden Steel


Need to case harden steel? Sometimes you do! This gets a tough edge on whatever you need.

How many times have you wished that you could put a tough edge on an ordinary nail and drive it through a piece of—say, 1/8-in. steel plate?

Now, using a non-poisonous alloy powder developed by Samuel D. Necamp, known as Hi-Speed-It you can do just that. The powder fuses into the metal and increases the hardness in a matter of seconds.