Heat Treating 440c Stainless Steel Knife

Remove the blade from the. 440 c is a high carbon chromium stainless that resists corrosion from fresh water steam crude oil gasoline stains from food acids and fruit. 440c is not a forgiving steel that can be worked and reworked in a forge hammered cooled heated hammered cooled heated repeatedly without substantial damage to the structure and allotropes desired.

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Stresses created in hand forging 440c are destructive and permanent.

Heat treating 440c stainless steel knife.

The excellent wear and resistant qualities of 440 c steel make it the natural choice of knifemakers. Decarburization is the number one reason for bad heat treating results. Therefore i wouldn t recommend it for hard usage a boning knife for example it would be a great knife for the wet environment fishing knife or kitchen knife and it holds an edge for long which is great for an edc knife carry. 440c is a hardenable chromium steel.

I hope this helps others who are trying to heat treat their stainless knifes. It has one of the highest attainable hardnesses of the corrosion and heat resisting grades. Everything i ve been able to pull up on various websites about heat treating 440c is conflicting. Place the blank the unfinished piece that will become your knife blade in the heat treating oven and heat.

This can also be done wit. Place it into the oven and heat slowly to between 1 400 and 1 450 degrees fahrenheit. Hot rolled and annealed typical chemistryc 1 00 mn 45 si 30 cr 17 00. Some say oil quench some say air hardening some say you can do either which i didnt think was possible but ive been wrong before and some on either sides of those spectrums talk about a cryo cycle after hardening.

This grade is magnetic at all times. The method we use to heat treat 440c ss knife blades. How to heat treat 440 stainless step 1. For those applications where superior machinability is desired and where slightly lower corrosion resistance is satisfactory 440c can be supplied.

440c is mid range that used to be a high end stainless steel that offers great corrosion resistance and great wear resistance and will take a great mirror polish so the answer is yes it s a good steel for knives but it has low toughness.

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