Cupronickel 75-25, UNS C71300 Copper Coinage Alloy

CuNi20 (B19) C71000 Copper Nickel Alloy Strip, Copper Tube C71000 suppliers

Exporter of C71000 copper bus bar rod, C71000 Copper Nickel Sheet and C71000 Copper Nickel Plate supplier

Cupronickel 75-25 Tube


Cupronickel 75-25 Tube

C71000 Copper Nickel Alloy Strip


C71000 Copper Nickel Alloy Strip

ASME SB466 CuNi UNS C71000 Seamless Pipe


ASME SB466 CuNi UNS C71000 Seamless Pipe

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Cupronickel 75-25 is a Non-Marine Alloys. Its also known as 75-25 Copper-Nickel and UNS C71300 Copper Coinage Alloy.

Non-Marine Alloys
75-25 Copper-Nickel UNS C71300

Cupronickel Materials
Materials Alloy number SM UNS
CuNi25 067 C71300

Aluminium Bronzes
Materials Alloy number SM UNS
CuAI8 083 -
CuAI6Ni2 085 C61550
CuAl5Zn5Sn1/Nordic Gold 086 -
CuNi6Al2 088 -

Nickel Brass Materials
Materials Alloy number SM UNS
CuZn20Ni1 025 -
CuZn20Ni2 225 -
CuZn15Ni5 325 -
CuZn20Ni5 525 -
CuZn24.5Ni5.5 625 -
CuZn25Ni5 825 -

Nickel Silver
Materials Alloy number SM UNS
CuNi12Zn29 073 C76200
CuNi12Zn24 074 C75700
CuNi10Zn25 374 C74500
CuNi15Zn20 075 C75400
CuNi18Zn20 076 C76400
CuNi18Zn17 077 C75200
CuNi18Zn27 078 C77700

Dimensions
Coil width up to max. 1.250 mm
Coil thickness max. 2,5 mm / min 1,0 mm
Ringgewicht up to 15 kg/mm
Temper as rolled or soft annealed


75-25 Copper-Nickel Properties:

  • Density
  • Hardness, Rockwell B, Hard Drawn (H80 - for Tubing) or Rolled (H04 for Flat Products)
  • Tensile Strength, Ultimate, Annealed
  • Tensile Strength, Ultimate, Hard Drawn (H80 - for Tubing) or Rolled (H04 for Flat Products)
  • Tensile Strength, Yield, Annealed
  • Elongation at Break, Hard Drawn (H80 - for Tubing) or Rolled (H04 for Flat Products)
  • Elongation at Break, Annealed
  • Tensile Modulus, (C71500 Annealed)
  • Poissons Ratio, (C71500 Annealed)
  • Machinability, Based on Free cutting brass = 100%
  • Shear Modulus, (C71500 Annealed)
  • Electrical Resistivity
  • CTE, linear
  • Specific Heat Capacity
  • Thermal Conductivity
  • Melting Point
  • Solidus
  • Liquidus
  • Copper, Cu, As Remainder
  • Iron, Fe
  • Lead, Pb
  • Manganese, Mn
  • Nickel, Ni
  • Zinc, Zn


UNS C71300 Copper Coinage Alloy Chemical Composition

Element Content (%)
Cu 71.25-76.5
Fe ≤ 0.20
Pb ≤0.050
Mn ≤ 1.0
Ni 23.5-26.5
Zn ≤ 1.0


Physical Properties of UNS C71300 copper nickel alloy

Properties Metric Imperial
Density 8.94 g/cm3 0.323 lb/in³


UNS C71300 copper nickel alloy Mechanical Properties

Properties Metric Imperial
Hardness, Rockwell B (hard drawn-H80 for tubing / rolled-H04 for flat products) 69 69
Tensile strength (annealed) 359 MPa 52000 psi
Tensile strength (hard drawn-H80 for tubing / rolled-H04 for flat products) 538 MPa 78000 psi
Yield strength (annealed) 103 MPa 15000 psi
Elongation at break (hard drawn-H80 for tubing / rolled-H04 for flat products) 11.00% 11.00%
Elongation at break (annealed) 40% 40%
Elastic modulus (C71500 annealed) 152 GPa 22000 ksi
Poisson’s ratio (C71500 annealed) 0.325 0.325
Machinability (based on free-cutting brass = 100) 20 20
Shear modulus (C71500 annealed) 57.2 GPa 8300 ksi

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