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1.2316

  • EN1.2316
  • ENX38CrMo16

Pre-hardened plastic mold steel with high corrosion resistance thanks to 16% Cr.

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01Material Properties

  • Very high corrosion resistance
  • Good toughness
  • Pre-hardened yet easy to machine (sulphur addition)
  • Optimum wear resistance
  • Not suitable for nitriding

02Applications

  • Extrusion and injection molds for corrosive polymers such as PVC
  • Mold holders and calibration blocks
  • Mold bolsters
  • Machine parts

03Heat Treatment

Typical values

Delivery condition
Pre-hardened 280–325 HB
Stress relieving
550–600 °C after rough machining; furnace cooling
Re-hardening
1000–1030 °C, oil/air → ≈ 50–52 HRC
Tempering (after re-hardening)
180–250 °C → 48–50 HRC or 550–600 °C → 30–34 HRC
Nitriding
Not recommended (reduces corrosion resistance)

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 → 51 HRC200 °C → 49 HRC300 °C → 47.5 HRC400 °C → 46 HRC500 °C → 45 HRC550 °C → 40 HRC600 °C → 33 HRC650 °C → 28 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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