Case Hardening Steels

Case Hardening Steel

Steels designed for the hardening of the surface layer

Carburized steels, with a low carbon content, allow pieces to be obtained that, after the mechanical processing and carburizing treatment, combine a high surface hardness with a good core toughness.

Thanks to the high surface hardness that can be obtained with the carburizing treatment, these steels are used to create those mechanical bodies for which a considerable surface hardness is necessary, such as gears, pins, bushes, shafts, and everything necessary for the transmission of motion. The versatility of the range of carburized steels allows a vast range of uses to be covered, from the smallest gears to motor shafts of considerable size.

The heat treatments available for this type of steel – to be checked on a case-by-case basis according to the different qualities – are: rolled natural, workable annealed, isothermal annealed, globular annealed, normalized, and quenched and tempered.

Range of Production

  Execution Profile Range
[mm]
Finish Tolerances
Bars Rolled Round 20-200 Raw
Peeled
Drawn Round
Hexagonal
Square

3-70
3-70
4-60

Polished EN 10278
h9
h10
h11
Peeled
Rolled
Round 20-100 Polished EN 10278
h9
h10
h11
Ground Round 5-60 Polished EN 10278
h7
h8
h9
h10
h11
Coils Drawn

Round 
Hexagonal 
Square

2-22
3-12
4-12

Polished
Phosphated
EN 10278
h9
h10
h11
  Execution Profile Range
[mm]
Finish Tolerances
Bars Rolled Round 20-200 Raw
Peeled
Drawn Round
Hexagonal
Square

3-70
3-70
4-60

Polished EN 10278
h9
h10
h11
Peeled
Rolled
Round 20-100 Polished EN 10278
h9
h10
h11
Ground Round 5-60 Polished EN 10278
h7
h8
h9
h10
h11
Coils Drawn

Round 
Hexagonal 
Square

2-22
3-12
4-12

Polished
Phosphated
EN 10278
h9
h10
h11
Quality WNr. Description Pdf
C10E
C10R
C10Pb
1.1121
1.1207
Low carbon non-alloy carburized steel. Temperable in water.
C15E
C15RPb
1.1141 Non-alloy carburized steel with slightly more carbon than the previous one. Temperable in water.
Quality WNr. Description Pdf
16MnCr5
16MnCrS5
16MnCrS5Pb
1.7131
1.7139
Manganese and chromium steel suitable for small or medium sized pieces.
20MnCr5
20MnCrS5
1.7147
1.7149
Manganese and chromium steel with a content of alloy elements slightly higher than the previous type, suitable for large pieces.
12NiCr3 Steel with a low chrome, nickel, and carbon content. Suitable for small pieces. It has a good cold deformability at the globular annealed state.
16NiCr4
16NiCrS4
16NiCrS4Pb
1.5714
1.5715
Steel with the addition of chromium and nickel in higher quantities than 12NiCr3. Used for pins and gears.
20CrNi4 Steel that originated in the automobile industry, no longer present in the international standards. Thanks to its high nickel content, it is used for pieces that are particularly subject to fatigue and vibrations.
20NiCrMo2-2
20NiCrMoS2-2
1.6523
1.6526
Steel with chromium, nickel, and molybdenum, suitable for pieces of a complex shape with good core tenacity.
17NiCrMo6-4
17NiCrMoS6-4
17NiCrMoS6-4Pb
1.6566
1.6569
Alloy steel with chromium, nickel, and molybdenum. This is a carburized steel with excellent temperability that is often used to obtain pieces with high requirements and complex shapes such as gears and large shafts subject to fatigue and vibrations.
Quality WNr. Description Pdf
C10E
C10R
C10Pb
1.1121
1.1207
Low carbon non-alloy carburized steel. Temperable in water.
C15E
C15RPb
1.1141 Non-alloy carburized steel with slightly more carbon than the previous one. Temperable in water.
Quality WNr. Description Pdf
16MnCr5
16MnCrS5
16MnCrS5Pb
1.7131
1.7139
Manganese and chromium steel suitable for small or medium sized pieces.
20MnCr5
20MnCrS5
1.7147
1.7149
Manganese and chromium steel with a content of alloy elements slightly higher than the previous type, suitable for large pieces.
12NiCr3 Steel with a low chrome, nickel, and carbon content. Suitable for small pieces. It has a good cold deformability at the globular annealed state.
16NiCr4
16NiCrS4
16NiCrS4Pb
1.5714
1.5715
Steel with the addition of chromium and nickel in higher quantities than 12NiCr3. Used for pins and gears.
20CrNi4 Steel that originated in the automobile industry, no longer present in the international standards. Thanks to its high nickel content, it is used for pieces that are particularly subject to fatigue and vibrations.
20NiCrMo2-2
20NiCrMoS2-2
1.6523
1.6526
Steel with chromium, nickel, and molybdenum, suitable for pieces of a complex shape with good core tenacity.
17NiCrMo6-4
17NiCrMoS6-4
17NiCrMoS6-4Pb
1.6566
1.6569
Alloy steel with chromium, nickel, and molybdenum. This is a carburized steel with excellent temperability that is often used to obtain pieces with high requirements and complex shapes such as gears and large shafts subject to fatigue and vibrations.

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