Hard Chrome Plating

Specifications

Rockwell Hardness72 RC
Maximum Plating Temperature140°F
Melting Point1900°C
Density6.9 g/cm3

Hard chrome plating is applied to ferrous and nonferrous materials to improve wear and abrasion resistance, reduce friction, prevent seizing and galling, and to restore the dimensions of undersized parts.

The standard thickness for hard chrome plating applications is .0002 - .0006" (.00508 - .01524 mm). High wear applications should have .001" or more for the best results. Thickness over 1 mil generally requires the plating to be applied thicker than desired, then ground to size

Surface engineering is a hot topic these days, with applications throughout a wide range of industrial sectors. Engineering surface treatments and coatings can bring specialist properties of corrosion and wear resistance, without compromising the characteristics of the substrate or base metal.

Hard chrome measures between 66 to 70 HRC. Hard chrome tends to be thicker than the decorative treatment, typically ranging from 0.075 to 0.25 mm (0.0030 to 0.0098 in), but thinner and thicker layers are not uncommon. Surface defects and roughness are amplified, because hard chrome does not have a leveling effect. Hard chromium plating is subject to different types of quality depending on your substrate.

Hard chrome deposits have a lustrous appearance. The deposit is not largely affected by temperatures to 800F, and it resists corrosion extremely well. Also, it is attacked by few chemicals or substances.

Hard chrome’s main attribute is its low coefficient of friction, being the lowest out of any other metal. Hard chrome has a very low coefficient of friction, approximately one half that of steel. The coefficient against steel of 0.16 lubricated (0.21 dry) makes it ideally suited for an array of applications.

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