High Carbon Steel Strip.

High carbon steels contain from 0.7 to 1.00% C with manganese ranging from 0.5% to 0.9% This steels are commonly known as spring steel. These steels are generally operated at very high stresses and heat-treated to obtain the maximum elastic limits and fatigue resistance without becoming sufficiently brittle to cause sudden failure in service. Hardenability of spring steel is very important because only fully hardened springs have the maximum resistance to take a permanent set (sagging).