* Rang of application( material)

C Si Mn Cr Mo P S

0. 25-0. 30 0. 20-0. 40 1. 0-1. 40 0. 8-1. 20 0. 1-0. 15 0. 025 0. 025

Mechanical properties:

* Hardness : HRC48-52

* Toughness: 20J/cm 2