What Kind Of Steel Is A Saw Blade? Is It Suitable For Knives?

Saw blades are typically made of high-speed steel (HSS), alloy tool steel, or carbide steel, depending on the application. High-speed steel saw blades (such as M2 and M42) contain alloying elements such as tungsten and molybdenum, offering high heat resistance and suitable for cutting metals. Alloy tool steel saw blades (such as 9CrSi and Cr12MoV) achieve high hardness through heat treatment and are commonly used for cutting wood or plastics. Carbide saw blades (tungsten steel) use tungsten carbide as a matrix and offer excellent wear resistance, often used for precision machining. Technically, saw blade materials must balance hardness, toughness, and heat resistance. High-speed steel maintains its hardness at temperatures up to 600°C, making it suitable for continuous cutting. Alloy tool steel can reach a hardness of HRC60 or above through quenching and tempering, but it is more brittle. Carbide can reach a hardness of HRA90, but offers less impact resistance. Industry standards typically specify a hardness of HRC58-62 for metal cutting saw blades and HRC52-56 for wood saw blades. Whether a material is suitable for making knives depends on the specific situation. When a high-speed steel saw blade is converted into a cutting tool, its high hardness and heat resistance can meet some requirements, but it requires resharpening and adjustment of the heat treatment process (such as low-temperature tempering to reduce brittleness). Alloy tool steel saw blades with a moderate carbon content (such as 0.9%-1.3%) can be made into high-performance cutting tools through forging and quenching, but attention should be paid to stress relief. Carbide saw blades are generally not suitable for direct knives due to their high brittleness, unless used in special scenarios (such as engraving knives). In practical applications, there are two major issues to be addressed when converting saw blades: one is material uniformity (saw blades are mostly coils or forgings, which may have segregation); the other is geometric accuracy (saw blades are generally thin and require stacking or sandwiching). Overall, some saw blade materials (such as high-speed steel and alloy tool steel) can be made into knives after modification, but they require professional processing and heat treatment, and their performance may not be as good as specialized tool steels.