1.2842 (O 2/BO 2)
  
 

Cold-working tool steel for the production of tools, measuring instruments, devices, templates, guideways and components of all types.

This material can be obtained tailored to your specifications as standard material for machine components and hardened guideways with a thickness of less than 40 mm.

When thermal treating the material, it should be noted that 1.2842 is a fully-hardened material whose volume may change by approx. 1 ‰, although it exhibits little distortion. As a consequence, workpieces with cross sections over 40 mm can have lower hardening grades than 58-62 HRc. For larger component cross sections of guideways we recommend 1.2363 or the gluing of hardened guideways, for wear parts we also recommend 1.2379.

We ensure easy and trouble-free machining of the material.
 
Tempering chart
Tempering temperature: 810°C
Specimen cross section: square 20mm
 
Heat treatment chart
 
Repair welding
There is a general tendency for tool steel to develop cracks from welding.
 
Continuous cooling TTT curves
 
Chemical composition % C
0,90		 Si
0,20		 Mn
2,00		 Cr
0,40		 V
0,10
 

Austenitizing temperature: 820°C
Holding time: 15 minutes

Vickers hardness
5...100 phase percentage
0,03...7,18 cooling parameter, i.e. cooling period from 800 - 500°C
in s x 102
B...Bainite
 
Quantitative phase diagram
B...Bainite
 
Isothermal TTT curves
Chemical composition % C
0,90		 Si
0,20		 Mn
2,00		 Cr
0,40		 V
0,10
Austenitizing temperature: 820°C
Holding time 15 minutes
 
Influence of work diameter on core hardness hardness penetration
Hardening temperature: 820°C
Hardening agent: oil