GB/T 69955 steel is a high carbon structural steel with good wear resistance and high hardness after heat treatment. The grade is suitable for springs and high-strength mechanical parts.
55 steel is a high carbon structural steel with good wear resistance and high hardness after heat treatment. The grade is suitable for springs and high-strength mechanical parts.
Applications
Used for springs, wear plates, shafts, rollers, high-strength pins, and machine tools.