Excellent corrosion resistance.
Hiperchromium 200 is a bar with a chrome layer of 20 µm, able to guarantee a rating 10 after 150 hours and a rating 9 after 200 hours. Tested according to the norm ISO 9227 (natural salt spray test).
regarding the evaluation of results obtained. (ISO 10.289)
Diameters up to 20 mm, Chromelayer 14 μm min, tolerance f8
Diameters over 20 mm, Chromelayer 20 μm min, tolerance f7
Chrome layer 20 µm min, tolerance f7
Chromelayer hardness HRC 66-69
(HV 0,1 / HV 850-1000)
Roughness Ra max. 0,20 µm
150 HOURS RATING 10 AND 200 HOURS RATING MINIMUM 9 IN NAURAL SALT SPRAY
The HIPERCROMIUM® technology is in use for chromium plating:
LABORATORY TEST according to ISO 9227 (NSS)
Results evaluation according to ISO 10.289
DIAMETERS > 20 mm
|Straightness||Better than 0,5 / 2000 m|
|Tolerance||According to ISO f7|
|Out of Roundness||Within ½ of ISO tolerance field|
|Surface Roughness Rt 3 μm max.||Ra < 0,2 μm|
Rt < 3 μm max
|Chromium Layer Hardness||HRC 66 - 69 (HV 0,1 / HV850-1000)|
|Steel Grades||CK 45, 18MnV5 / 20MnV6|
|Induction Hardening||CK 45/50,|
Gauss distribution of corrosion tests results.
Stelmi: Rating ≥ 9 minimum
Competition: rating 9 as anaverage.
The graphic shows the substantial difference between what Stelmi declares about the evaluation of the corrosion resistance (Rating) and what is often declared by other producers. Gauss distribution of
corrosion tests results »
The HIPERCHROMIUM technology has established new standards in the fluidpower industry: 200, 500 and 1000 hours of corrosion resistance in Neutral Salt Spray test ( in compliance with ISO 9227 standard) with a minimum rating ) ( according to ISO 10289 standard).
A technological milestone than many companes still try to reach.
Thousands tests in our quality laboratory confirmed by indipendent laboratories and by the most prestigious Customers around the world proved the reliability of this technology.
The HIPERCHROMIUM TECHNOLOGY is fully developed in our R&R Department: mone than 35 years of technological know-how, proudly MADE IN ITALY.
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