15CrMoR
It’s the pressure vessel steel. Belonging to a medium temperature hydrogen steel , origin: Wugang, Shougang, Wuhan Iron and Steel, South Steel, new steel, Xiangtan Steel, Jinan Iron and Steel."15" is a carbon content component 0.15%
"Cr" is a component containing a certain chemical element - chromium
"Mo" is a component containing a certain chemical element - molybdenum
"R" is the first letter of the container board capacity
15CrMoR, heat treatment often used: normalizing plus tempering
Origin: Wugang, Wuhan Iron and Steel, the new steel ---- Wugang Runlu