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Surface hardness and Nitriding Hardness Depth after Plasma Nitriding

The following table shows steels and irons frequently used in the plasma nitriding process -

# Sintered Steel # Structural Steel # Free Cutting Steel # Case Hardening Steel# Heat Treatment steel (non-alloyed) # Heat Treatment Steel (alloyed) # # Globular Cast Iron # Nitriding Steel # Roller Bearing Steel # Spring Steel # Non-alloyed Tool Steel # High-speed Tool Steel # Cast Iron # Tool Steel for Cold Work # Bright Drawn carbon Steel # Tool Steel for Hot Work # Corrosion and acid resistant Steel # Special Aircraft Industry Steels

Material Group Old Description
Material No.

 New Description

 Surface Hardness after Nitriding in HV1
 Nitriding Depth
(Nht in mm) max..
 White-layer-thickness µm
Structural Steel
 St 33 (St 26)
 1.0035
 S185
 200 - 350
 0,8
 4 - 9
R St 37-2
St 37-3N
 1.0038
1.0116
 S235JRG2
S235J2G3
 200 - 350
 1,0
 4 - 10
St 52-3
 1.0576
 S355J2H
 300 - 550
 0,7
 4 -10
(St 60)
St 60-2
 (1.0062)
1.0060
 E335
 300 - 550
 1,0
 4 - 10
Rfe 160
 1.1011
300 - 400 0,7 4 - 10






Free Cutting Steel 9 S 20 1.0711 10S20 (1.0721)
 200 - 300 1,0
9 SMnPb 28 1.0718 11SMnPb30
 200 - 350 1,0 6 - 10
ETG® 88 (44SMn28)
please refer to data sheet of the Steeltec AG, CH-6021 Emmenbrücke		 1.0762 SAE 1144 respectively  44SMn28 450 - 650 1,0 5 - 10
ETG® 100 (44SMn28)
please refer to data sheet of the Steeltec AG, CH-6021 Emmenbrücke		 1.0762 SAE 1144 respectively  44SMn28 450 - 650 1,0 5 - 10
16 MnCrS 5 1.7139 16 MnCrS 5
 600 - 750 1,0
9 SMn 36
 1.0736
250 - 350

60 S 20
 1.0728
250 - 300







Case Hardening Steel Ck 15 1.1141 C15E
 300 - 400 1,0 4 - 10
C 10
 1.0301
300 - 400
 0,8
 4 - 10
C 15
 1.0401
 ---
 300 - 400
 0,8
 4 - 10
14 NiCr 14
 1.5752
 15NiCr13
 500 - 700
 0,4
 4 - 8
15 CrNi 6 1.5919 ---
 650 - 750 0,5
 4 - 8
16 MnCr 5 / EC 80
 1.7131
 16MnCr5
 650 - 750
 1,0
 4 - 7
17 CrNiMo 6 1.6587 18CrNiMo7-6
 650-750 0,8
18 CrNi8 1.5920
500 - 700 0,5
 4 - 8
20 Mn 5 1.1133
250 - 350 0,6 4 - 8
20 MnCr 5
 1.7147
 20 MnCr5
 650 - 750
 1,0
 4 - 7
21 MnSi 5
 1.0471
350 - 400
 0,6
 4 - 8
21 NiCrMo 2
 1.6523
 20NiCrMo2-2
 500 - 600
1,0






Heat Treatment Steel (non-alloyed) Ck 30 1.1178 C30E
 300 - 450 1,0
Ck 45 1.1191 C45E
 350 - 500 1,0
Ck 60 1.1221 C60E
 350 - 550 1,0
ETG® 88 (44SMn28)
please refer to data sheet of the Steeltec AG, CH-6021 Emmenbrücke 		1.0762 SAE 1144 respectively  44SMn28 450 - 650 1,0 5 - 10
ETG® 100 (44SMn28)
please refer to data sheet of the Steeltec AG, CH-6021 Emmenbrücke 		1.0762 SAE 1144 respectively  44SMn28 450 - 650 1,0 5 - 10












Heat Treatment Steel (alloyed) 24 CrMoV 5-5
 1.7733
650 - 750
 0,5
 4 - 8
25 CrMo 4
 1.7218
550-650
 0,6
 4 - 8
30 CrNiMo 8
 1.6580
 30CrNiMo8
 550 - 750
 0,6
 4 - 8
31 NiCr 14
 1.5755
550 - 750
 0,4
 4 - 8
32 CrMoV 12-10
 1.7765
800 - 950
 0,5
 4 - 8
32 NiCrMo 12-5
 1.6655
550 - 650
 0,4
 4 - 8
34 Cr 4
 1.7033
 34Cr4
 550 - 650
 0,6
 4 - 8
34 CrAl 6
 1.8504
800 - 1000
 0,5
 2 - 10
34 CrAlMo 5
 1.8507
800 - 1000
 0,5
 2 - 10
34 CrMo 4
 1,7220
 34CrMo4
 550 - 650
 0,6
 4 - 8
34 CrNiMo 6
 1.6582
 34CrNiMo6
 500 - 650
 0,6
 4 - 6
37 MnSi 5
 1.5122
400 - 500
 0,6
 4 - 6
39 CrMoV 13-9
 1.8523
800 - 950
 0,5
 4 - 8
41 Cr 4
 1.7035
 41Cr4
 550 - 650
 0,5
 4 - 8
42 CrMo 4 1.7225 42CrMo4
 550 - 650 1,0 4 - 8
50 CrV 4 1.8159 51Cr4
 500 - 650 0,5 4 - 8
53 MnSi 4
 1.5141
400 - 500
 0,6
 4 - 8
58 CrV 4
 1.8161
500 - 650
 0,5
 4 - 8
50 CrV4
 1.8159
 51CrV4
 500 - 650
 0,8
 4 - 10
55 Cr 3
 1.7176









Nitriding Steel 14 CrMoV 6-9
 1.7735
550 - 750

30 CrMoV 9
 1.7707
850 - 950
 0,8
 4 - 8
31 CrMo 12
 1.8515
950 - 1150

31 CrMoV 9
 1.8519
850  - 950
 0,8
31 CrMoV9 V
(also Heat Treatment Steel)		 1.8519



34 CrAl6
 1.8504
950 - 1150
 0,8
34 CrAlS 5
 1.8506
950 - 1150

34 CrAlMo 5 1.8507
950 - 1150 0,8
34 CrAlNi 7
 1.8550
950 - 1150
 0,8
 4 - 10
34 CrAlV 9

950 - 1150

39 CrMoV 13-9 1.8523
950 - 1200 0,5 4 - 8
41 CrAlMo 7
 1.8509
950 - 1200







Roller Bearing Steel 100 Cr 6 1.3505
550-650 0,8
X 102 CrMo 17 1.3543
1000-1200 0,2






Spring Steel Ck 75 1.1248
500-600 1,0 4 - 10
60 SiMn 5 1.5142
500-600 1,0 4 - 10
67 SiCr 5
 1.7103


4 - 10
58 CrV 4 1.8161
600-700 0,8 4 - 10






Non-alloyed Tool Steel C 105 W 1 1.1545
550-650 1,0 4 - 10
C 80 W 2 1.1625
550-650 1,0 4 - 10






High-speed Tool steel
 S 12-1-4 1.3302
1000-1250 0,2 2 - 6
S 6-5-2 1.3343
1000-1250 0,2 2 - 6
S 18-0-1 1.3355
1000-1250 0,2 2 - 6






Tool steel for Cold Work X 165 CrV 12 1.2201
1000-1200 0,2 4 - 8
29 CrMoV 9 1.2307
850-950 0,4 4 - 10
40 CrMnMo 7 1.2311
600-700 0,8 4 - 10
40 CrMnMoS 8-7 1.2312
600-700 0,8 4 - 10
X 100 CrMoV 5-1 1.2363
800-900 0,4 4 - 10
X 155 CrVMo 12-1 1.2379
1000-1200 0,2 4 - 10
X 45 NiCrMo 4 1.2767
600-700 0,8 4 - 10
90 MnCrV 8 1.2842
550-650 0,8 4 - 10
X 37CrMoW 5-1
 1.2606
900 - 1050
 0,4
 4 - 10






Tool Steel for Hot Work X 42 Cr 13 1.2083
1000-1200 0,2 4 - 8
X 40 CrMoV 5-1 1.2344
900 - 1200 0,2 4 - 8
X 60 WCrMoV 9-4 1.2622
800 - 900 0,2 4 - 8
55 NiCrMoV 6 1.2713
500-650 0,6
 4 - 8
X 15 CrCoMoV 10-10-5 1.2886
1000-1200 0,2
 4 - 8






Corrosion and acid resistant Steell X 30 Cr 13 1.4028 X30Cr13
 950 - 1200 0,2 4 - 8
X 14 CrMoS 17 1.4104 X14CrMoS17
 950 - 1200 0,2 4 - 8
X 90 CrMoV 18 1.4112 X90CrMoV18
 950 - 1200 0,2 4 - 8
X 38 CrMoV 15 1.4117 ---
 950 - 1200 0,2 4 - 8
X 5 CrNi 18 10 1.4301 X5CrNi18-10
 950 - 1200 0,2 4 - 8
X 10 CrNiS 18 9 1.4305 X8CrNiS18-6 950 - 1200 0,2 4 - 8
X 5 CrNiMo 17 12 2 1.4401 X5CrNiMo17-12-2
 950 - 1200 0,2 4 - 8
X 90 CrCoMoV 17 1.4535
950 - 1200 0,2 4 - 8
X20 Cr 13
 1.4021
900 - 1200
 0,2
 4 - 8
X 39 CrMo 17-1
 1.4122
 X35CrMo17
 950 - 1200
 0,2
 4 - 8
X 3 NiCoMoTi 18-9-5
 1.2709
850 - 1000
 0,2
 4 - 8
X 12 CrNi 18-9
 1.4300
950 - 1200
 0,2
 4 - 8






Cast Iron GG 25 CrMo .
600 - 700 0,6 4 - 10
GG 25 0.6025
300 - 400 0,6 4 - 10
GG 30 0.6030
350 - 450 0,6 4 - 10






Globular Cast Iron GGG 40 .0.7040
400 - 500 0,6
 4 - 10
GGG 60 0.7060.
500 - 600 0,6 4 - 10
GGG 70 0.7070.
400 - 650 0,6 4 - 10






Sintered Steel
 Astaloy Mo
 .
400 - 500


Sint D 30

270 - 350







Bright drawn
carbon steel
1.2210
 115CrV 3
 250 - 350

Special Aircraft Industry Steels

 15 CDV 6Astaloy Mo . similar with 15CrMoV 6 9  - 1.7734



1.4545
 X8CrNiNb 14-5

1-5

1.4546
 X8CrNiNb 14-5


1-5

1.6604
 similar with 1.6655 / 32 NiCrMo 12-5
 800 - 900
6 - 12

1.6354 similar with 1.6351 / GX2NiCoMoTi 17-10
900 - 1100

6-12

1.7734
 similar with 1.7735 / 14CrMoV 6-9
 900 - 1000
   6-12

AerMet 100

850 - 950

Nittralloy N

1000 - 1200