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Carburizing steel

Fields of use

Bolts, shafts, gear wheels, etc. with hard surface and tough core.

Description

Carburizing steels have a carbon content of less than 0.25% and small levels of alloying elements, which aid through-tempering (Cr, Mn, Ni, Mo) on one hand and form hard carbides (Cr, Mo) with the introduced carbon on the other hand, which increases the abrasion resistance.

Properties

Outstanding combination of properties such as durability, high abrasion resistance, resistance to flexural stress and impact loading. Very good endurance limit due to compressive strength in the hard surface. Tough, low-carbon core.

Welding:
Cannot be welded (C15 can be welded very well before carburizing)
Distortion:
Distortion particularly in parts made of unalloyed steels (water-hardening) and/or with complicated form.
Necessary postprocessing:
By grinding certain functional sections, negative properties (e.g. radial deviation) are reduced and tolerances and surface roughness can be diminished.

Product offers from Stahl-Contor from the Embrach service centre

Material

number

   Description

Delivery

condition

Dimensions off the shelf

Typical applications

1.1141

  C15 E

+U

20mm to 300mm

Small mechanical engineering components with low core strength such as levers, joints, connectors, bolts, pins, joints, attachments

1.5752

  14NiCr14

  15NiCr13

+A

20mm to 400mm

Heavy-duty gear shafts, gear wheels, bevelled wheels and crown wheels, Cardan joints, articulated shafts, bolts, pins, etc.

1.6587

 18CrNiM7-6

  17CrNiMo6

  +A

25mm to 360mm

Heaviest duty gear parts, particularly crown wheels, driving pinions of larger dimensions and similar consumable parts.

1.7139

  16MnCrS5

+TH

20mm to 330mm

Gear wheels and shafts in gear and vehicle manufacturing, control parts, Cardan joints, bolts, pins, etc.

1.7139

 16MnCrS5-  STC-MX_MB®

+TH

30mm to 180mm

Same as 16MnCrS5, but with better machining. Suitable for parts with a major level of machining.

 

Carburization

Tough components are obtained through the use of low-carbon steels. However, these only adopt a low level of hardness during the quenching process. For this reason, carbon is applied to the peripheral area using diffusion, so that a layer of temperable steel with approx. 0.8% carbon is created. During the quenching process, the core is tempered and the peripheral layer is hardened. This hardening procedure is made up of two processes, the carburizing and the actual hardening.