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What is NiColoy®

   
 


NiColoy® is NiCoForm, Inc.'s class of proprietary electrodeposited Nickel-Cobalt alloys distinguished by the following combination of features:

  • Leveled, smooth matte to semi bright deposit with low internal stress
  • High tensile strength
  • Medium-to-high hardness
  • High modulus of elasticity
  • High corrosion resistance
  • High purity
  • Amenable to soldering, brazing and welding

We produce two modifications of NiColoy® - high strength and high hardness, depending on the target application. The harder deposit is more suitable for mold inserts and mold repair applications. The high strength deposit exhibits a unique combination of elasticity and plasticity and is used to electroform bellows, diaphragms and other dynamic components. Please see the accompanying table and charts for a comparison of properties of the two types of NiColoy®.

As can be seen from the charts, the high strength alloy possesses
 a higher elongation than the high hardness one, and a somewhat lower strength and hardness. Such metals are conventionally described as 'ductile'. When stressed over its yield limit, the high strength alloy will plastically deform, rather than snap or crack in a brittle mode.

The high hardness alloy exhibits greater hardness and tensile strength, but lower elongation. This material's mechanical properties are closer to those of hardened tool steels, which dictates its application for mold inserts.


Comparative Properties of NiColoy® and Nickel


Property

High Hardness, NiColoy® - H

High Strength, NiColoy® - E

Electroformed Nickel

Comments

Ultimate Tensile Strength (psi/MPa)

210,000/1448

150,000/1034

91,500/631

NiColoy® exhibits greater tensile strength than Nickel

Yield Strength (psi/MPa)

185,000/1275

110,000/758

61,000/420

NiColoy® resists permanent deformation better than Nickel

Hardness, RC

45 - 55

30 - 40

 < 20  

Modulus of Elasticity in Bending (Kpsi/MPa)

24,000/165,000

22,500/155,000

21,000/145,000

NiColoy® exhibits greater elasticity than Nickel

Poisson’s Ratio

0.31

0.31

0.31

 

Shear Modulus (Kpsi/MPa)

9,200/63.4

8,400/57.9

8,000/55.2

 

Elongation at Break

0.25 - 2%

3 - 5%

15 - 25%

 

Typical Composition

Nickel – 95% Min.
Cobalt – balance

Nickel – 85% Min.
Cobalt – balance

Nickel - 99.5% Min.

 

Max Temp Rating (°F/°C)

660-925350-500 *

660-925350-500 *

350175 

NiColoy® withstands substantially higher temperatures than electroformed Nickel

Coefficient of Thermal Expansion, mean linear at 20 °C, μm/m/°C, at 25 Deg. C

13.3 13.3  no data  
Thermal Conductivity, W/m*K 87.5 87.5  no data  

* The listed mechanical performance is maintained up to 350 Deg. C. Higher temperatures will result in temperature-dependent reduction in performance characteristics

Data contained in this table is for informational purposes only and may be revised at any time without prior notice. Nothing contained in this document should be construed as guaranteeing the materials suitability for a particular use or application.

 

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