D3 Tool Steel

1.2080

EN1.2080
ENX210Cr12
AISID3

Cold work tool steel with 12% chromium. The dense hard carbides in its structure give high wear resistance. Due to its sensitivity to tensile stresses and low toughness it has largely been replaced by other grades depending on the application.

01Heat Treatment

Typical values

Soft annealing: 800–840 °C; max. 250 HB
Stress relieving: 600–650 °C
Preheating: 650 °C (and 850 °C)
Hardening: 940–970 °C; 15–30 min
Quenching medium: Oil or 500–550 °C salt bath + air
As-quenched hardness: ≈ 63–65 HRC
Tempering: 150–250 °C, twice
Working hardness: 58–63 HRC
Note: No high-temperature (secondary hardening) tempering

Heat treatment cycle (schematic)

Stages and temperatures are typical values; soaking times depend on section size.

Tempering diagram (approximate)

Approximate hardness versus tempering temperature after hardening from the typical austenitising temperature.

Values are approximate and for information only; they vary with section size, heat and furnace conditions. Binding values are determined from the manufacturer’s data under laboratory conditions.

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