U10A grade refers to high quality steels. The letter "U" at the beginning of the marking means "carbon steel", The letter "A" at the end - high quality steel.
Chemical composition: - 0.95 carbon, 1.09, silicon - 0.2, manganese - 0.20, sulfur - phosphorus - 0.025
U10a is the so-called light steel, steel without halloy bands inside, chrome extrusions, etc., it is suitable for differential quenching, the low manganese content makes it possible to obtain many details (choji).
- Has good hardenability during heat treatment
- It has a high surface hardness
- Good stability after heat treatment.