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What is SK4 Steel?SK4 steel is a carbon tool steel, an alloy of chromium, vanadium, and molybdenum, and it stands out because of its high hardenability and toughness. Sk4 steel is a water hardening tool steel just like AISI W1 steel and belongs to the Sk family of steel comprising SK3, SK4, SK5 SK6… SK4 steel is not stainless steel because it contains very low amounts of chromium in its composition (0.30%), it is thus…

Sk5 steel is a low-end, modern Japanese Carbon steel. It is considered an equivalent to the 1080 steel from America. The name is derived from Steel Kuogu (SK), which means steel tool, and the number “5” represents the impurity levels. SK5 steel is not stainless steel because it contains low chromium in its composition, meaning it is poor in corrosion resistance. Some users skip knives made from this steel because it is not stainless steel.…

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