The concept of "strongest steel" is complex, as different steel alloys are designed to excel in specific applications and properties. Steel strength can be measured in various ways, including tensile strength, yield strength, hardness, and impact resistance. Here are a few examples of steel alloys known for their exceptional strength in different contexts:

1. Carbon Steels: High-carbon steels like 1095 and 5160 are known for their high tensile strength and hardness. These steels are often used in applications where hardness, edge retention, and strength are critical, such as knife blades and tools.
2. Tool Steels: Tool steels, such as D2 and M2, are designed to have high hardness, wear resistance, and strength, making them suitable for demanding applications like cutting tools, molds, and dies.
3. Stainless Steels: Certain stainless steel alloys, such as 440C and S30V, are known for their high tensile strength, hardness, and corrosion resistance. These steels find applications in the production of high-quality knives and tools.
4. Maraging Steels: Maraging steels, such as Maraging 300 and Maraging 350, are low-carbon, nickel-rich steels known for their exceptional strength and toughness. They are often used in aerospace and high-performance applications.
5. Alloy Steels: Various alloy steels, such as 4340 and 4140, are designed to have a combination of high strength, toughness, and wear resistance. These steels find applications in industries like automotive, aerospace, and machinery.

It's important to note that the "strongest steel" for a particular application depends on the specific requirements, such as the load, environment, and intended use. Different steel alloys are optimized for different properties, and the choice of the strongest steel will vary based on those factors.