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1.2085

  • EN1.2085
  • ENX33CrS16

Plastic mold and holder steel with improved corrosion resistance from 16% Cr and improved machinability from sulphur addition.

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01Material Properties

  • Good corrosion resistance
  • Very good machinability
  • Dimensional stability

02Applications

  • Mold holders for all kinds of plastic injection molds
  • Holders for precision molds
  • Mold holders where corrosion in cooling channels must be avoided
  • Injection molds not requiring high surface polish
  • Rubber molds
  • Machine parts requiring stainless properties

03Delivery Condition

  • Pre-hardened 280–325 HB (29–33 HRC)

04Heat Treatment

Typical values

Delivery condition
Pre-hardened 280–325 HB
Stress relieving
550–600 °C after rough machining; furnace cooling
Re-hardening
1000–1050 °C, oil/air → ≈ 48–50 HRC
Tempering (after re-hardening)
500–600 °C → 30–40 HRC
Nitriding
Not recommended due to sulphur content

Heat treatment cycle (schematic)

0200400600Stress relieve575°1. Stress relieve — 575 °C2. Cool — 25 °CTime (schematic, not to scale)°C
Stages and temperatures are typical values; soaking times depend on section size.

Tempering diagram (approximate)

203040506001002003004005006007000 °C → 50 HRC200 °C → 48 HRC300 °C → 47 HRC400 °C → 46 HRC500 °C → 45 HRC550 °C → 40 HRC600 °C → 34 HRCTempering temperature (°C)Hardness (HRC)
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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