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1.2067 | 102Cr6 +QO +T Hardened and tempered at 150 °C (quenchant: oil)

Numeric designation1.2067 | SAE52100 | AMS6440
Chemical designation102Cr6
State+QO +T Hardened and tempered at 150 °C (quenchant: oil)
Etching3% Nital

This hypereutectoid steel (bar stock with ⌀ = 16 mm) was austenitized at 840 °C for 30 min, quenched in oil and then tempered at 150 °C for 2 hours. The microstructure consists of martensite with finely distributed, brightly shining carbides. At low magnification, a slightly network-like structure is still visible.

The core hardness averages 780 ± 4 HV1.

Condition:
840 °C / 30 min / oil – 150 °C / 2 h / air