1/8″ x 2″ x 36″ O1 Tool Steel

O1 tool steel is a low alloy cold work tool steel that must be oil-quenched in heat treatment. O1 contains small amounts of manganese, tungsten, and chromium, giving O1 adequate toughness for normal tool & die uses. O1 has deep hardening properties with fine grain structure with unusual toughness. O1 has good response to heat treatment with small dimensional changes.

Composition

0.90% C, 1.0–1.4% Mn, 0.50% Cr, 0.50% Ni, 0.50% W