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The steel used to make PUMA German knives is the best knife steel in the world. The proper amount of carbon makes a knife easy to sharpen and hold a cutting edge, but it also allows a knife to rust more easily unless other trace elements are added to protect oxidation. In our 440C steel, we add about 1% carbon for a great edge and about 17% chromium to maintain the temper but inhibit rust. About 0.35% Silicon is also added to the base alloy to deoxidize the steel and further stabilize the blade.
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