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||140,000/965||91,500/631||NiColoy® has higher tensile strength than Nickel|
|Yield Strength (psi/MPa)||185,000/1275||100,000/690||61,000/420||NiColoy® resists permanent deformation better than Nickel|
|Hardness, RC||45 - 55||35 - 45||< 20||
|Modulus of Elasticity in Bending (Kpsi/MPa)||24,000/165,000||22,500/155,000||21,000/145,000||NiColoy® has higher elasticity than Nickel|
|Shear Modulus (Kpsi/MPa)||9,200/63.4||8,400/57.9||8,000/55.2||
|Elongation at Break ( % )||0.25 - 2||1.5 - 5||15 - 25||
|Typical Composition||Nickel 95% Min.
Cobalt - balance
|Nickel 90% Min.
Cobalt - balance
|Nickel - 99.5% Min.||
|Max Temp Rating (°F/°C)||660-925/350-500*||660-925/350-500*||350/177||NiColoy® withstands substantially higher temperatures than electroformed Nickel|
|Coefficient of Thermal Expansion, mean linear at 20 °C, µm/m/°C, at 25°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 ° 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 material's suitability for a particular use or application.