15N20 is a high-toughness carbon steel alloy containing nickel and chromium, known for its hardness, lustrous appearance, and corrosion resistance. It is commonly used for applications requiring moderate strength such as machine components, shafts, and gears. This grade can also be used for high-intensity applications like bandsaw blades, knifemaking, and making damascus steel blades when in sheet/plate form due to its ability to resist acid etching.