Catalogue 2 - STAUFF Connect

T 330 www.stauff.com/2/en/#330 Catalogue 2 § Edition 03/2024 Technical Appendix Tube Fitting Materials and Surface Finishings Layers ¡ Sealing ¡ Passivation ¡ Zinc/Nickel ¡ Steel STAUFF Zinc/Nickel Coating Fitting bodies of the STAUFF Connect range are usually machined from drawn or forged steel in accordance with DIN 3859-1 (Technical Specification for Tube Fittings). Union nuts are either cold-pressed or hot-pressed. Unless otherwise stated, all metal parts of the STAUFF Connect range of tube fittings are made of Steel with standard Zinc/Nickel coating (material code: W3), that offers excellent surface protection far beyond the market standard. One of the few exceptions, weld fittings are made of Steel, phosphated (material code: W2). Alternative surface coatings are available upon request. Do not hesitate to contact STAUFF for further information. Main Advantages of the STAUFF Zinc/Nickel Coating ¡ Premium long-life surface protection against corrosion with more than 1200 hours resistance to red rust / base metal corrosion in the salt-spray test according to DIN EN ISO 9227 ¡ Free of hexavalent chrome Cr(VI) ¡ ELV compliant according to 2000/53/EC (End of Life Vehicles Directive) ¡ REACH compliant according to 1907/2006/EC (Registration, Evaluation, Authorisation and Restriction of Chemicals) ¡ RoHS compliant according to 2002/95/EC (Restrictions of the Use of Hazardous Substances) ¡ Easily surpassing the requirements of the corrosion protection class K5 (360 hours resistance to white rust / 720 hours resistance to red rust) as defined by the VDMA, the German Engineering Association (VDMA Standard Sheet 24576 „Fluid Power - Requirements and designations for corrosion-protection coatings free of hexavalent chrome“) ¡ Significantly reduced tendency to corrosion by contact with other metals such as Aluminium and Stainless Steel ¡ High abrasion resistance due to the ductility / plastic deformability of the coating ¡ Appealing colour scheme with a bright semi-gloss surface finish – comparable to Stainless Steel ¡ Surface is paintable with good paint adhesion properties (However, a painting test and, if necessary, degreasing of the surfaces to be painted are highly recommended) ¡ Little to no risk of triggering allergies, as the Zinc/Nickel base layer with a nickel content of 12-15 % is covered by both a passivation and a sealing layer to avoid the release of nickel and any direct physical contact ¡ Resistant against all commonly used hydraulic media