Knowde Enhanced TDS
Identification & Functionality
- Product Type
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
Applications & Uses
- Applications
- Application Area
- Application Method
- Compatible Substrates & Surfaces
- Applications
Hardide-W has been developed for advanced engineering applications which will benefit from the coating’s chemical and corrosion resistance, ductility, extremely high melting temperature, strong adhesion and non-porous structure, but which do not require high hardness and wear resistance. Hardide-W consists of high purity metal tungsten with small amounts of special alloying elements which enhance the material’s mechanical properties. It is a REACH-compliant replacement for cadmium plating.
Hardide-W properties include:
• The coating technology achieves high deposition rates and low residual stresses enabling the production of thick coatings in excess of 100 microns and is also suitable for producing very thin conformal coatings of a few microns thickness. This expands the range of applications covering a wide variety of coating thicknesses.
• Can be applied to internal and external surfaces and complex shapes uniformly
• Pore-free coating has enhanced chemical resistance and is an excellent barrier against corrosion
• Can be applied to a wide range of metals including various grades of stainless steel, tool and alloy steels, nickel, copper and cobalt-based alloys Hardide Coatings’ UK and USA manufacturing sites are approved to ISO 9001 and aerospace AS 9100 certification. The UK site is also accredited to Nadcap and ISO 14001.
Examples of Hardide-W applications include:
• A corrosion barrier coating with enhanced anti-galling properties replacing toxic cadmium plating on aircraft components
• Coating on anodes which generate X-rays while dissipating the heat and ensuring excellent electrical conductivity even in thermal shock and thermal cycling conditions
• Coating on graphite components and tooling for high temperature vacuum reactors used in semiconductor manufacturing
Properties
- Typical Properties
- Key Properties
Coating Thickness Ranging from 5 to 100 microns (0.0002 - 0.004”)
Thicker or thinner coatings can be produced, ask for details.Coating Toughness Excellent. Good resistance to thermal shockStrain to Fracture Higher than 0.3% (3000 microstrain)Adhesion Tensile Bond Strength Better than 70 MPa or 10,000 psi
Under standard bond test ASTM C633-01, the Hardide coating adhesion bond is proven to be higher than the adhesive ultimate strength of 70 MPa (10,000 psi)
Note that the Hardide coating has a smooth and pore-free surface, so ASTM C633 results can vary due to the bond strength of the adhesive used. Typically results between 50 and 70 MPa are considered acceptable as long as the coating shows no adhesive or cohesive failures.Coating Composition Metal tungsten with small amounts of alloying elements
Does not contain Cobalt or other metal binder materials used in Cemented Carbides and thermal spray coatingsCoating Porosity < 0.5% as measured in accordance with ASTM E2109Appearance Coating as applied is light gray
Finishes to a high metallic luster when polishedFinishing Operations Grinding, Honing, Lapping, Polishing, Super-finishingSurface finish As coated 0.4 - 0.6 microns Ra / 16 - 24 μin
Can be polished to 0.2 - 0.3 microns Ra / 8 - 12 μin
Can be super finished to 0.02 microns Ra / 0.8 μinCorrosion Resistance Resistant to acids, H2S and some aggressive chemicalsCoating Temperature Typically 460°- 520°C / 860°- 968°F dependent on substrate
| Value | Units | Test Method / Conditions | |
| Electrical Resistivity (20°C) | 5.5 | microhm-cm | — |
| Linear Coefficient of Expansion | 4.3 x 10-⁶ | ºC | — |
| Density (20ºC) | 19.3 | gm/cc | — |
| Thermal Conductivity @ 20oC | 174.0 | W/m·K | — |
| Specific Heat Capacity @ 20oC | 0.132 | J/g·K | — |
| Microhardness (Hv) | 400 - 500 Hv | kgf/mm2 | — |
Regulatory & Compliance
- Certifications & Compliance