Nitriding
Steel
Surface Hardness Hv
Case Depth mm
EN3A, 070M20, 080M40, Mild Steels
350 - 500
0.100 – 1.00
EN19, 708M40, 4140, 4340, P20
550 – 850
0.025 – 1.00
EN40, 722M24, 31CrMoV9
750 – 1000
0.025 – 0.70
EN41, 905M39, Nitralloy
750 – 1100
H13, H11, D2, Hot Work Tool Steel
800 - 1200
0.025 – 0.50