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Carburized Steels
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Carburized Steels

Technical Features of Carburized Steels
Carburizing steels are steels which require features such as softness and satiety in the core, and hardness 
and wear resistance on the surface. These steels can be used both alloyed or non-alloyed, and they contain low carbon (0.10-0.25%). 
These steels are used in parts where variable-impact loads and wear are effective, as they are resistant to wear on the surface despite
 their high satiety values.
 
 
1.  CHEMICAL COMPOSITION
Chemical Composition % by Mass
Quality C Simax. Mn Pmax. Smax. Crmax. Momax. Nimax. Cumax. Al B
16MnCr5 0,14 – 0,19 0,40 1,00 – 1,30 0,025 max. 0,035 0,80 – 1,10 – – – – –
16MnCrS5 0,020 – 0, 040
20MnCr5 0,17 – 0,22 0,40 1,10 – 1,40 0,025 max. 0,035 1,00 – 1,30 – – – – –
20MnCrS5 0,020 – 0, 040
20NiCrMo2-2 0,17 – 0,23 0,40 0,65 – 0,95 0,025 max. 0,035 0,35 – 0,70 0,15 – 0,25 0,40 – 0,70 – – –
20NiCrMoS2-2 0,020 – 0, 040
SAE 8620H 0,17 – 0,23 0,15 – 0,35 0,60 – 0,95 – – 0,35 – 0,65 0,15 – 0,25 0,35 – 0,75 – – –
18CrNiMo7-6 0,15 – 0,21 0,40 0,50 – 0,90 0,025 0,035 1,50 – 1,80 0,25 – 0,35 1,40 – 1,70 – – –
16MnCr5MOD 0,14 – 0,18 0,21 – 0,29 1,05 – 1,15 0,025 0,030 0,80 – 0,90 – 0,15 0,10 0,020 – 0,030 0,0030 – 0,0070
19CrNi5 0,16 – 0,21 0,15 – 0,35 0,70 – 1,10 0,035 0,020 – 0,040 0,80 – 1,20 0,10 0,80 – 1,20 0,30 0,020 – 0,050 –
19MnCr5G 0,15 – 0,21 0,15 – 0,35 1,00 – 1,30 0,035 – 0,80 – 1,10 – – 0,30 0,020 – 0,050 –
2. TECHNICAL DELIVERY CONDITIONS
ASTM A304 Standard Specification for Carbon and Alloy Steel Bars Subject to Hardenability Conditions
EN 10277-4: 2008 Bright Steel Material. Technical Delivery Conditions. Carburized Steels.
EN 10084: 2008 Carburized Steels. Technical Delivery Conditions.
3. AREAS OF USE
Carburized steels are usually used in components such as gears, shafts, rollers, bushes, rolling and guide 
bearings, discs, piston pins.
16MnCr5 Carburized Steel Technical Features According to EN10084
Carburizing steels are steels which require features such as softness and satiety in the core, and hardness 
and wear resistance on the surface. These steels can be used both alloyed or non-alloyed, and they contain low carbon (0.10-0.25%). 
These steels are used in parts where variable-impact loads and wear are effective, as they are resistant to wear on the surface despite
 their high satiety values.
 
 
Material Name: Material No: Equivalent Qualities:
16MnCr5 1.7131 SAE 5115
16MnCrS5 1.7139 AFNOR 16MC5
AFNOR 16MC5u
1. CHEMICAL COMPOSITION
Chemical Composition % by Mass
Quality C Simax. Mn Pmax. S Cr Mo Ni
16MnCr5 0,14 – 0,19 0,40 1,00 – 1,30 0,025 max. 0,035 0,80 – 1,10 – –
16MnCrS5 0,020 – 0, 040
2. MECHANICAL FEATURES
Cold Cutability Annealing (+S): –
Soft Annealing (+A): max. 207 HB
Annealing by Hardness Range (+TH): min. 156 HB max. 207 HB
Annealing by Ferrite-Perlite Structure and Hardness Range (+FP): min. 140 HB max. 187 HB
Normalised (+N): min. 138 HB max. 187 HB
Rockwell Class C Hardness Limit Values for Special Steel Qualities with Normal Hardenability Requirements 
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
1,5 3 5 7 9
16MnCr5 +H max. 47 46 44 41 39
16MnCrS5 min. 39 36 31 28 24
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
11 13 15 20 25
16MnCr5 +H max. 37 35 33 31 30
16MnCrS5 min. 21 – – – –
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
30 35 40 45 50
16MnCr5 +H max. 29 28 27 – –
16MnCrS5 min. – – – – –
3. TECHNICAL DELIVERY CONDITIONS
EN 10277-4: 2008 Bright Steel Material. Technical Delivery Conditions. Carburized Steels.
EN 10084: 2008 Carburized Steels. Technical Delivery Conditions.
4. AREAS OF USE
Carburized steels are usually used in components such as gears, shafts, rollers, bushes, rolling and guide 
bearings, discs, piston pins.
20MnCr5 Carburized Steel Technical Features According to EN10084
Carburizing steels are steels which require features such as softness and satiety in the core, and hardness 
and wear resistance on the surface. These steels can be used both alloyed or non-alloyed, and they contain low carbon (0.10-0.25%). 
These steels are used in parts where variable-impact loads and wear are effective, as they are resistant to wear on the surface despite
 their high satiety values.
 
 
Material Name: Material No: Equivalent Qualities:
20MnCr5 1.7147 SAE 5120
20MnCrS5 1.7149 AFNOR 20MC5
AFNOR 20MC5u
1. CHEMICAL COMPOSITION
Chemical Composition % by Mass
Kalite C Simax. Mn Pmax. S Cr Mo Ni
20MnCr5 0,17 – 0,22 0,40 1,10 – 1,40 0,025 max. 0,035 1,00 – 1,30 – –
20MnCrS5 0,020 – 0, 040
2. MECHANICAL FEATURES
Cold Cutability Annealing (+S): max. 255 HB
Soft Annealing (+A): max. 217 HB
Annealing by Hardness Range (+TH): min. 170 HB max. 217 HB
Annealing by Ferrite-Perlite Structure and Hardness Range (+FP): min. 152 HB max. 201 HB
Normalised (+N): min. 140 HB max. 201 HB
Rockwell Class C Hardness Limit Values for Special Steel Qualities with Normal Hardenability Requirements 
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
1,5 3 5 7 9
20MnCr5 +H max. 49 49 48 46 43
20MnCrS5 min. 41 39 36 33 30
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
11 13 15 20 25
20MnCr5 +H max. 42 41 39 37 35
20MnCrS5 min. 28 26 25 23 21
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
30 35 40 45 50
20MnCr5 +H max. 34 33 32 – –
20MnCrS5 min. – – – – –
3. TECHNICAL DELIVERY CONDITIONS
EN 10277-4: 2008 Bright Steel Material. Technical Delivery Conditions. Carburized Steels.
EN 10084: 2008 Carburized Steels. Technical Delivery Conditions.
4. AREAS OF USE
Carburized steels are usually used in components such as gears, shafts, rollers, bushes, rolling and guide 
bearings, discs, piston pins.
20NiCrMo2-2 Carburized Steel Technical Features According to EN10084
Carburizing steels are steels which require features such as softness and satiety in the core, and hardness 
and wear resistance on the surface. These steels can be used both alloyed or non-alloyed, and they contain low carbon (0.10-0.25%). 
These steels are used in parts where variable-impact loads and wear are effective, as they are resistant to wear on the surface despite
 their high satiety values.
 
 
Material Name: Material No: Equivalent Qualities:
20NiCrMo2-2 1.6523 SAE 8620
20NiCrMoS2-2 1.6526 AFNOR 20NCD2
AFNOR 20NCD2u
1. CHEMICAL COMPOSITION
Chemical Composition % by Mass
Quality C Simax. Mn Pmax. S Cr Mo Ni
20NiCrMo2-2 0,17 – 0,23 0,40 0,65 – 0,95 0,025 max. 0,035 0,35 – 0,70 0,15 – 0,25 0,40 – 0,70
20NiCrMoS2-2 0,020 – 0, 040
2. MECHANICAL FEATURES
Cold Cutability Annealing (+S): –
Soft Annealing (+A): max. 212 HB
Annealing by Hardness Range (+TH): min. 161 HB max. 212 HB
Annealing by Ferrite-Perlite Structure and Hardness Range (+FP): min. 149 HB max. 194 HB
Normalised (+N): – –
Rockwell Class C Hardness Limit Values for Special Steel Qualities with Normal Hardenability Requirements 
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
1,5 3 5 7 9
20NiCrMo2-2 +H max. 49 48 45 42 36
20NiCrMoS2-2 min. 41 37 31 25 22
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
11 13 15 20 25
20NiCrMo2-2 +H max. 33 31 30 27 25
20NiCrMoS2-2 min. 20 – – – –
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
30 35 40 45 50
20NiCrMo2-2 +H max. 24 24 23 – –
20NiCrMoS2-2 min. – – – – –
3. TECHNICAL DELIVERY CONDITIONS
EN 10277-4: 2008 Bright Steel Material. Technical Delivery Conditions. Carburized Steels.
EN 10084: 2008 Carburized Steels. Technical Delivery Conditions.
4. AREAS OF USE
Carburized steels are usually used in components such as gears, shafts, rollers, bushes, rolling and guide 
bearings, discs, piston pins.
8620H Carburized Steel Technical Features According to ASTM A304
Carburizing steels are steels which require features such as softness and satiety in the core, and hardness 
and wear resistance on the surface. These steels can be used both alloyed or non-alloyed, and they contain low carbon (0.10-0.25%). 
These steels are used in parts where variable-impact loads and wear are effective, as they are resistant to wear on the surface despite
 their high satiety values.
 
 
Material Name: Material No: Equivalent Qualities:
SAE 8620H – 20NiCrMo2-2
AFNOR 20NCD2
1. CHEMICAL COMPOSITION
Chemical Composition % by Mass
Quality C Si Mn Pmax. S Cr Mo Ni
SAE 8620H 0,17 – 0,23 0,15 – 0,35 0,60 – 0,95 – – 0,35 – 0,65 0,15 – 0,25 0,35 – 0,75
2. MECHANICAL FEATURES
Cold Cutability Annealing (+S): –
Soft Annealing (+A): max. 255 HB
Rockwell Class C Hardness Limit Values for Special Steel Qualities with Normal Hardenability Requirements 
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
1,5 3 5 7 9
SAE 8620H +H max. 49 48 45 42 36
min. 41 37 31 25 22
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
11 13 15 20 25
SAE 8620H +H max. 33 31 30 27 25
min. 20 – – – –
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
30 35 40 45 50
SAE 8620H +H max. 24 24 23 – –
min. – – – – –
3. TECHNICAL DELIVERY CONDITIONS
ASTM A304 Standard Specification for Carbon and Alloy Steel Bars Subject to Hardenability Conditions
4. AREAS OF USE
Carburized steels are usually used in components such as gears, shafts, rollers, bushes, rolling and guide 
bearings, discs, piston pins.
18CrNiMo7-6 Carburized Steel Technical Features According to EN10084
Carburizing steels are steels which require features such as softness and satiety in the core, and hardness 
and wear resistance on the surface. These steels can be used both alloyed or non-alloyed, and they contain low carbon (0.10-0.25%). 
These steels are used in parts where variable-impact loads and wear are effective, as they are resistant to wear on the surface despite
 their high satiety values.
 
 
Material Name: Material No: Equivalent Qualities:
18CrNiMo7-6 1.6587 17NiCrMo6-4
AFNOR 18NCD6
1. CHEMICAL COMPOSITION
Chemical Composition % by Mass
Quality C Simax. Mn Pmax. Smax. Cr Mo Ni
18CrNiMo7-6 0,15 – 0,21 0,40 0,50 – 0,90 0,025 0,035 1,50 – 1,80 0,25 – 0,35 1,40 – 1,70
2. MECHANICAL FEATURES
Cold Cutability Annealing (+S): max. 255 HB
Soft Annealing (+A): max. 229 HB
Annealing by Hardness Range (+TH): min. 179 HB max. 229 HB
Annealing by Ferrite-Perlite Structure and Hardness Range (+FP): min. 159 HB max. 207 HB
Normalised (+N): – –
Rockwell Class C Hardness Limit Values for Special Steel Qualities with Normal Hardenability Requirements 
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
1,5 3 5 7 9
18CrNiMo7-6 +H max. 48 48 48 48 47
min. 40 40 39 38 37
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
11 13 15 20 25
18CrNiMo7-6 +H max. 47 46 46 44 43
min. 36 35 34 32 31
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
30 35 40 45 50
18CrNiMo7-6 +H max. 42 41 41 – –
min. 30 29 29 – –
3. TECHNICAL DELIVERY CONDITIONS
EN 10277-4: 2008 Bright Steel Material. Technical Delivery Conditions. Carburized Steels.
EN 10084: 2008 Carburized Steels. Technical Delivery Conditions.
4. KULLANIM ALANLARI
Carburized steels are usually used in components such as gears, shafts, rollers, bushes, rolling and guide 
bearings, discs, piston pins.
16MnCr5MOD Carburized Steel Technical Features Suitable for Özkan Demir Çelik Production Cold Forging
Carburizing steels are steels which require features such as softness and satiety in the core, and hardness 
and wear resistance on the surface. These steels can be used both alloyed or non-alloyed, and they contain low carbon (0.10-0.25%). 
These steels are used in parts where variable-impact loads and wear are effective, as they are resistant to wear on the surface despite
 their high satiety values.
 
 
Material Name: Material No: Equivalent Qualities:
16MnCr5MOD – –
1. CHEMICAL COMPOSITION
Chemical Composition % by Mass
Quality C Si Mn Pmax. Smax. Cr Mo Nimax.
16MnCr5MOD 0,14 – 0,18 0,21 – 0,29 1,05 – 1,15 0,025 0,030 0,80 – 0,90 – 0,15
Cumax. Al B
0,10 0,020 – 0,030 0,0030 – 0,0070
2. MECHANICAL FEATURES  
Cold Cutability Annealing (+S): –
Soft Annealing (+A): max. 255 HB
Rockwell Class C Hardness Limit Values for Special Steel Qualities with Normal Hardenability Requirements 
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
1,5 3 5 7 9
16MnCr5MOD +H max. 47 46 44 41 39
min. 39 36 31 28 24
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
11 13 15 20 25
16MnCr5MOD +H max. 37 35 33 31 30
min. 21 – – – –
3. TECHNICAL DELIVERY CONDITIONS
Özkan Demir Çelik Special Specification
4. AREAS OF USE
Carburized steels are usually used in components such as gears, shafts, rollers, bushes, rolling and guide 
bearings, discs, piston pins. 16MnCr5MOD material is suitable for cold forging applications.
Özkan Demir Çelik Production 19CrNi5  Carburized Steel Technical Features
Carburizing steels are steels which require features such as softness and satiety in the core, and hardness 
and wear resistance on the surface. These steels can be used both alloyed or non-alloyed, and they contain low carbon (0.10-0.25%). 
These steels are used in parts where variable-impact loads and wear are effective, as they are resistant to wear on the surface despite
 their high satiety values.
 
 
Material Name: Material No: Equivalent Qualities:
19CrNi5 – 19CN5
1. CHEMICAL COMPOSITION
Chemical Composition % by Mass
Quality C Si Mn Pmax. Smax. Cr Momax. Ni
19CrNi5 0,16 – 0,21 0,15 – 0,35 0,70 – 1,10 0,035 0,020 – 0,040 0,80 – 1,20 0,10 0,80 – 1,20
Cumax. Al
0,30 0,020 – 0,050
2. MECHANICAL FEATURES  
Cold Cutability Annealing (+S): –
Soft Annealing (+A): max. 260 HB
Rockwell Class C Hardness Limit Values for Special Steel Qualities with Normal Hardenability Requirements 
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
1,5 3 5 7 9
19CrNi5 +H max. 47 46,50 45,50 41 43,50
min. 41,50 40 37 35 33
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
11 13 15 20 25
19CrNi5 +H max. 43 41,50 40 36,50 33,50
min. 31 28,50 27 23,50 22
3. TECHNICAL DELIVERY CONDITIONS
Özkan Demir Çelik Special Specification
4. AREAS OF USE
Carburized steels are usually used in components such as gears, shafts, rollers, bushes, rolling and guide 
bearings, discs, piston pins.
Özkan Demir Çelik Production 19MnCr5G  Carburized Steel Technical Features
Carburizing steels are steels which require features such as softness and satiety in the core, and hardness 
and wear resistance on the surface. These steels can be used both alloyed or non-alloyed, and they contain low carbon (0.10-0.25%). 
These steels are used in parts where variable-impact loads and wear are effective, as they are resistant to wear on the surface despite
 their high satiety values.
 
 
Material Name: Material No: Equivalent Qualities:
19MnCr5G – –
1. CHEMICAL COMPOSITION
Chemical Composition % by Mass
Quality C Si Mn Pmax. Smax. Cr Momax. Ni
19MnCr5G 0,15 – 0,21 0,15 – 0,35 1,00 – 1,30 0,035 – 0,80 – 1,10 – –
Cumax. Al
0,30 0,020 – 0,050
2. MECHANICAL FEATURES  
Cold Cutability Annealing (+S): –
Soft Annealing (+A): max. 260 HB
Rockwell Class C Hardness Limit Values for Special Steel Qualities with Normal Hardenability Requirements 
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
1,5 3 5 7 9
19MnCr5G +H max. 44 43 41 37 34
min. 40 38 35 32 29
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
11 13 15 20 25
19MnCr5G +H max. 32 30 28 27 26
min. 26 24 22 – –
3. TECHNICAL DELIVERY CONDITIONS
Özkan Demir Çelik Special Specification
4. AREAS OF USE
Carburized steels are usually used in components such as gears, shafts, rollers, bushes, rolling and guide 
bearings, discs, piston pins.

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