1070 Steel is a simple carbon steel with good toughness and shock resistance. It also has an easy heat treatment cycle and is a good starter steel. It is also known as CS70 spring steel.
C: 0.65 - 0.75%
Heat Treatment Information
Heat to 788 - 829 degrees centigrade
Temper for 2 hours at 200 degrees centigrade for approx 59/60 HRc