15CrMoR is a steel for pressure vessels.
Ingredient introduction: "15" is the carbon content of 0.15% "Cr" is the ingredient containing a certain chemical element - chromium "Mo" is the ingredient containing a certain chemical element - molybdenum "R" is the first letter of the container plate capacity 15CrMoR.
Heat treatment is often used: normalizing + tempering. When the temperature is below 550, it has higher durability strength.
