
AISI D4 Oil-Hardening Cold-Work Tool Steel
AISI D4 (UNS T30404) — tungsten-modified D3, slightly better hot hardness. Compare with D2, D3, D5 for slitter blades at elevated cutting-edge temperatures.

AISI D4 (UNS T30404) — tungsten-modified D3, slightly better hot hardness. Compare with D2, D3, D5 for slitter blades at elevated cutting-edge temperatures.