Böhler N690 / 1.4528

Böhler N690 steel or 1.4528 (X105CrCoMo18-2) is a stainless, martensitic chromium steel alloyed with cobalt, molybdenum, and vanadium. 
For hardened tools and components requiring very high hardness. 
Required surface finish: fine ground or polished.

Properties

• High wear resistance
• Good corrosion resistance
• High hardness

Recommended applications

• European chef’s knives
• Hunting knives
• Outdoor knives (robust geometry)

Chemical composition

• C: 1,08%
• Si: 0,4%
• Mn: 0,4%
• Cr: 17,3%
• Mo: 1,1%
• V: 0,1%
• Co: 1,5%

Heat treatment: Hardening Böhler N690:

Böhler N690 should be hardened using foil, protective gas, or vacuum.

• Hardening temperature: 1070°C (air)
• Tempering: 2 hours at 200°C
• Annealing: 800°C - 850°C
• Hardness: 60 - 61 HRC

Finish
Laser cut, rolled & annealed