Böhler N690 / 1.4528

Böhler N690 steel or 1.4528 (X105CrCoMo18-2) is a stainless, martensitic chromium steel alloyed with cobalt, molybdenum, and vanadium. 
Ideal 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
• Forgiving during heat treatment

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%

Our "N690" heat treatment recommendation:
Hardening:

• Oxidation protection required
• Hardening temperature: 1040°C - 1080°C
• Quenching medium: air / alternatively oil
• Cryogenic treatment: optional, but beneficial
• Tempering: 180°C - 205°C
• Achievable hardness: 59 - 61 HRC

Annealing: Hold for 2 hours at 800°C - 850°C, then cool slowly

Finish
Laser cut, rolled & annealed
Austrian production