| Grade | IS 4367:1991 (Reaffirmed 2001) 15Cr3 / IS 4367 15Cr3 |
| Standard | IS 4367:1991 (Reaffirmed 2001) |
| Description | Low carbon chromium case hardening steel with good surface hardness after carburising. Used for small gears, pins, bushings and lightly stressed fasteners. |
| Applications | Low-alloy chromium case-hardening steel; used for gears, shafts, and transmission components requiring higher core strength and wear resistance than plain carbon case-hardening grades |