The steels used for spring making depend on the
application and type of spring. They range from plain
carbon grades in the range 0.5% to 1.00% C. to
Chromium, Chromium-Vanadium,
Nickel-Chromium-Molybdenum, Silico-Manganese and
Silicon-Manganese-Chromium-Molybdenum types. Full
details can be found in BS5770.