steel DC53 Tool Steel: Modified D2 with Secondary Hardening — High Toughness Cold-Work Die Steel
DC53 is a modified D2-type cold-work die steel with 8% Cr and secondary hardening at 520°C — delivers SKD11-level wear resistance at ~2× toughness. Full guide: composition, heat treatment, EDM performance, and when DC53 outperforms SKD11.