Böhler K390 Microclean

The Böhler K390 Microclean is a powder-metallurgically produced cold-work steel of the highest purity. It is perfect for products with high requirements for wear, toughness and compressive strength. The steel has a very even distribution of carbides. - good machinability and grindability - insensitive to overheating and long holding times during heat treatment Use: high-performance cutting tools, as blade steel for knife blades for high-quality (non-stainless) knives.

C: 2.45 Si: 0.55 Cr: 4.15 Mo: 3.75 V: 9.0 W: 1.0 Co: 2.00
Delivery condition:
-hot/cross rolled
-annealed
-laser cut (therefore no bending/curvature due to the cutting process!)
-relaxed
Achievable final hardness: 58-64 HRC
Heat treatment:
-Hardening at 1030 – 1180°C in oil/gas (vacuum)
(holding time: approx. 20-30 minutes for hardening temperature 1030 -1150°C)
(holding time: approx. 10 minutes for hardening temperature 1180°C)
-Slow heating to tempering temperature after hardening
-Tempering at 550°C (at least 2 hours)
-3x starting is recommended