Size Range



Copper Properties

Primary Metals and Alloys sources and stocks a full range of copper with different grades and extrusions.

  • Tinned and bare busbar (110 grade)
  • 110 grade and 147 grade (sulphur copper) copper rods
  • Roofing coil and copper sheet
  • Copper hollows/tubes
Description Measurement
Density at 20 ° C 8.94g/cm³
Melting point 1083°C
Coefficient of thermal expansion at:
25-100°C 0.000 016 8 per°C
25-300°C 0.000 017 7 per°C
Thermal conductivity at:
20°C 395 W/Km
0.94 cal, cm/cm2s°C
Electrical conductivity at:
20°C soft annealed 58.00-58.9 m/ohm mm²
20°C fully cold worked 58.3-56.6 m/ohm mm²
Electrical resistivity at:
20°C soft annealed Max 17.241 nΩm
20°C fully cold worked 17.86-17.65 nΩm
Temperature coefficient of electrical resistance at:
20°C soft annealed 0.003 93 per °C
100% IACS
20°C fully cold worked 0.003 81 per °C
97% IACS
Modulus of elasticity (tension) at:
20°C annealed 118kN/mm²
Modulus of rigidity at:
20°C annealed 44kN/mm²


  • High electrical conductivity (min. 100 IACS)
  • Good forming properties
  • Bendability to a minimum of 90°
  • Tight dimensional tolerances and
  • Excellent surface quality


Copper rods and bars are used for:

  • Power distribution
  • Power generation
  • Semiconductors and
  • Electronic applications
  • Applications
  • Heat sinks
  • Vacuum interrupters
  • Injector sleeves in diesel engines
  • Switchboards
  • Switchgear
  • Power distribution panels
  • Electrical motors and generators