... . Grade:G100 to G1000 3. Size: 1/8" to 7/8" 4. Hardness: 58-62HRC We've been concentrated on ... Chemical elements:C: 0.5-0.6, S: 0.04MAX, Mn: 0.6-1.0, P: 0.04MAX, Si: 0.2-0.4, Cr: 0.25MAX.Speciality:High ... Chemical elements:C: 0.72-0.92, S: 0.04MAX, Mn: 0.7-0.9, P: 0.04MAX, Si: 0.17-0.37, Cr: 0.4-0.6.Speciality:High hardness ... 8" 5/32" 3/16" 5/16" 7/32" 1/4" 3/8" -7/8" 1"Grade: G100 to G1000 Hardness: ...