18CrNiMo7-6 | 18NiCrMo5 | 1.6587 | Case-hardening steel

18CrNiMo7-6 | 18NiCrMo5 | 1.6587 |

Case-hardening steel

It is characterised by high case hardness and depth combined with excellent core strength. Recently the grade has been developed further by slightly increasing Carbon and Manganese content and this led to the new designation 18CrNiMo7-6, which is the current official designation for this steel under Euronorm EN 10084, which supersedes DIN17210.

Chemical Composition

Mechanical Properties

Physical Properties

Welding 

18CrNiMo7-6 Pre-heat welding area to 250-450°C and maintain this temperature while welding with a low hydrogen electrode. Cool at a maximum rate of 100°C per hour. Weld before carburising.

Applications 

18CrNiMo7-6 Gear parts exposed to highest stresses and wear conditions. Typical components include gears, planetary gears, plate wheels, drive pinions and shafts.