Here are some typical materials and degrees of overbend we begin our design with:
Cold Rolled Steel/ Soft Materials Rb 45-65 1 degree
Annealed Spring Steel Rb 65-80 3 degrees
Medium Temper ½ Hard Stainless Rc 30-35 5-7 degrees
Hard Temper Full Hard Stainless Rc 40-45 10 degrees