EN 10305-1 (DIN 2391)
Steel grade: E355 (St-52) / 1.0580
Delivery condition: +SR (BK+S)
Tolerance: ISO f7
Roughness: Ra máx. 0,25μm
Roundness: within ½ of ISO tolerance.
Chrome layer thickness: min. 20μm
Surface hardness: min. 900 HV0.1 (66 HRC)
Corrosion resistance: min. 72h in Neutral Salt Spray testing according to ISO 9227 or its equivalents, combined with evaluation according to ISO 10289. Min. rating ≥ 9.
Fields of application: chrome-plated tubes are primarily used for the manufacturing of hydraulic and pneumatic cylinders where low weight is a major concern.
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