C18000 Copper Chromium Nickel Silicon

The C18000 Copper Chromium Nickel Silicon is the copper base alloy which is heat treatable, high in strength and conductivity. The properties of this alloy can fairly be obtained after its heat treatment. The alloy is rich on properties like high hardness, strength and wear resistance with relatively high electrical and thermal conductivity.


  • Resistance Welding Tips, Wheels and Fixtures
  • Stud Welding Collets and Tips
  • Sprue Bushing
  • Cavities for Injection Molds
  • Hot runner Systems for Injection Molds
  • Welding Dies for Wire and Flash
  • Blow Pins
  • Pinch Offs
  • Mold Cavities for Bold Molds
  • Blow Pins
  • Pinch Offs
  • Mold Cavities for Bold Molds
  • Cores, Core and Ejector Pins for Injection Molds
  • Plunger Tips for Metal Die Casting Machines
  • Heat Sink Inserts in Steel Plastic Molds

Chemical Composition:

  Cr Cu Fe Ni Si
Min/Max 0.10 – 0.8 Rem 0.15 1.8 – 3.0 0.4 – 0.8
Nominals 0.45 2.4 0.6

Physical Properties:

Product Property US Customary Metric
Coefficient of Thermal Expansion 9.7 ppm/°F (17.5 ppm/°C)
Coefficient of Thermal Expansion
Density .318 lb/in3 (8.81 g/cm3)
Electrical Conductivity 45% IACS (26 MS/m) minimum
Electrical Resistivity
Melting Point Liquid US
Melting Point Solid US 1900°F (1040°C)
Modulas of Elasticity in Tension 18.5×106 psi (128 GPa)
Modulas of Rigidity
Specific Gravity
Specific Heat Capacity at 70°F (20°C) – 0.092 BTU/lb °F (385 J/kg K)
Thermal Conductivity at 212°F (100°C) – 120 BTU/hr ft °F (208 W/m K)

Sizes Available:

HOLLOW RODS Min Bore Size 20 mm and Max OD 100 mm
ROUND RODS 8mm To 100 mm
HEX 10mm To 60mm
SQUARE 10mm To 60mm
FLAT 10mm Min Thickness and max Width 120mm
BILLETS Up to 200 mm
INGOTS As per Specification

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Shree Extrusions Ltd


Shree Extrusions Ltd

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