Wholesale 9.53mm 3/8″ 0.375″ OD Copper Nickel (Cunifer/Kunifer) Tubing – Cupro Nickel (CuNi) 90/10

Copper Nickel 90/10; 3/8" 0.375" 9.53mm OD, 0.7mm 0.028" wall; MOQ 200 coils.

SKU: EI616CUN25 Category:
General Details

This copper nickel (also called cupro-nickel, cunifer, kunifer) tubing is made of 90% copper and 10% nickel, made by giant Chinese copper tube manufacturers that are ISO 9001 certified.

  • Much more softer than steel tubing
  • Extremely easy to bend and flare
  • Absolutely rust free
  • Meets SAE J1677 Surface Vehicle Standard
  • Suitable for ISO/DIN bubble flare,  ISO/SAE double flare (inverted flare), and single flare.

Properties

OD8.00+/-0.08mm
Wall0.7+/-0.08mm
Tensile Strength40 ksi (275MPa)
Yield Strength15 ksi (105MPa)
Expansion30% min
Theoretical Burst Pressure4522 psi i.e. 31.2MPa min

NOTE:

  1. We can also supply tubing of 0.75mm, or even thicker wall , to further increase pressure resistance.
  2. Burst pressure calculation could vary according to the stress limit applied to the formula.

Pb=1.155*σs*(2-σs/σb)*lnK
K=D0/(D0-2δ)

Where

Pb Burst pressure, MPa
σs Yield strength, MPa
σb Tensile strength, MPa
D0 Outside diameter, mm
δ Wall thickness, mm

Inspections

  1. Eddy Current (Non-Destructive)
  2. Flattening Test
  3. Expansion Test
  4. Tension Test
  5. Pressure Proof Test
  6. Mercurous Nitrate Test
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