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CuCrZr Chromium Zirconium Copper

CuCrZr

  • ENCW106C
  • DIN2.1293
  • UNSC18150
  • RWMAClass II

Copper-chromium-zirconium alloy combining high conductivity with resistance to softening at elevated temperature. A common choice for resistance welding electrodes and continuous casting molds.

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01Applications

  • Resistance welding electrodes
  • Seam welding wheels
  • Continuous casting molds (ferrous and non-ferrous)
  • Rotor bars and rings for AC motors
  • Electronic circuits, nuclear physics applications
  • Vacuum electronic circuit applications
  • EDM applications

02Heat Treatment

Typical values

Solution treatment
950–1000 °C; water quench
Ageing
450–500 °C, 2–4 h
After ageing
≈ 140–180 HB
Electrical conductivity
≈ 75–85 % IACS
Delivery condition
Solution treated + aged (and cold worked)

Heat treatment cycle (schematic)

02004006008001000Solution treat975°1. Solution treat — 975 °C2. Quench — 25 °CAge475°3. Age — 475 °C4. Cool — 25 °CTime (schematic, not to scale)°C
Stages and temperatures are typical values; soaking times depend on section size.

Ageing diagram (approximate)

05010015020001002003004005006007000 °C → 70 HB400 °C → 140 HB450 °C → 165 HB475 °C → 170 HB500 °C → 165 HB550 °C → 140 HB600 °C → 100 HB170 HBAgeing temperature (°C)Hardness (HB)
Approximate hardness versus ageing temperature after solution treatment (0 °C = solution-treated condition).

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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