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CuCoNiBe

  • ENCW103C
  • DIN2.1285
  • UNSC17540
  • RWMAClass III

Copper-cobalt-nickel-beryllium alloy with a conductivity and strength balance similar to CuCo2Be. Used in resistance welding and permanent mold casting.

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01Applications

  • Spot welding electrodes
  • Seam welding wheels
  • Projection and butt welding electrodes
  • Welding of stainless steel
  • Permanent molds for brass and bronze casting
  • Plastic injection mold components
  • Plungers for aluminium die casting machines
  • Electrode holders and seam welding shafts

02Heat Treatment

Typical values

Solution treatment
900–980 °C; water quench
Ageing
450–480 °C, 2–3 h
After ageing
≈ 200–240 HB
Electrical conductivity
≈ 45–50 % IACS
Delivery condition
Mill-hardened (TF00)

Heat treatment cycle (schematic)

02004006008001000Solution treat940°1. Solution treat — 940 °C2. Quench — 25 °CAge465°3. Age — 465 °C4. Cool — 25 °CTime (schematic, not to scale)°C
Stages and temperatures are typical values; soaking times depend on section size.

Ageing diagram (approximate)

5010015020025030001002003004005006007000 °C → 110 HB400 °C → 195 HB450 °C → 230 HB480 °C → 240 HB500 °C → 230 HB550 °C → 205 HB240 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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