Böhler K720 / 1.2842 manganese steel

Böhler K720 steel or 1.2842 / AISI O2 (90MnCrV8) is a carbon-manganese cold work steel/carbon steel (tool steel).

Properties

• Suitable steel for forging damascus (forge welding).
  Etches very dark/black in damascus patterns
• Very high sharpness
• Good edge retention / wear resistance
• Easy hardening

Recommended applications

• European chef’s knives
• Hunting knives
• Outdoor, survival & bushcraft knives

Chemical composition

• C: 0,90%
• Cr: 0,35%
• Mn: 2,00%
• Si: 0,25%
• V: 0,10%

Heat treatment: Böhler K720 hardening:

• Hardening: 820°C (oil)
• Tempering: 2 hours at 200°C
• Annealing: 680 to 720°C
• Hardness: ~62 HRC

Finish
Laser cut, rolled & annealed