Stainless steel M390
M390 is a martensitic, high-vanadium, high-chromium, and stainless super steel manufactured by Bohler-Uddeholm.
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The M390 – A quick look
According to the manufacturer, the M390 is a “micro-clean” super steel that offers superior edge retention and extraordinary wear/corrosion resistance.
Technically, the M390 is a tool steel, meaning that the steel is well equipped to withstand heavy uses for a long time.It can achieve a near-perfect mirror finish, giving your blades a cool outlook. The blade is also used to make screws, injection molding, and barrels.
Edge retention M390
The higher volume of Vanadium and Chromium used in the steel; combined with an advanced heat tempering technology, provides amazing-quality edge retention over time.
M390 Toughness
One of the few areas in which M390 is markedly superior to other steels is toughness.
The chipping resistance of M390 is higher than most other premium steels, even those with the same Rockwell hardness rating.M390 Corrosion Resistance
This super steel can withstand the harshest weather, including salt water and extremely wet environments. The M390 also has a trace amount of Manganese and Silicon, which increases the corrosion resistance and tensile strength.
The material composition of M390 steel is as follows:
The high concentration of chromium gives the steel toughness, while silicon and manganese give it tensile strength.
Material Concentration (%) Effect Chromium (Cr) 20.00 Increases corrosion resistance and toughness Vanadium (V) 4.00 Improves toughness and wear resistance Carbon (C) 1.90 Develops tensile strength Molybdenum (Mo) 1.00 Improves strength, hardness, and toughness Silicon (S) 0.70 Introduces corrosion resistance and strength Tungsten 
0.60 Develops hardenability and toughness Manganese (Mn) 0.30 Elevates tensile strength and hardenability
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