If you have ever seen this notation on a blueprint for automotive fasteners, hydraulic fittings, or stamped steel parts, you know it dictates a specific type of zinc electroplating. But what does each character mean? What is the difference between "8" and "12"? And crucially, what does the lowercase signify for your application?
is a German technical specification for electroplated zinc coatings on iron or steel. It is often used in conjunction with ISO 2081 , which has largely superseded or supplemented it for modern industrial requirements. Specification Breakdown din 50961 fe zn 8b
: The minimum local thickness of the zinc coating, which is 8 micrometers ( ) (approximately 0.00031 inches). If you have ever seen this notation on
Even with a proper DIN 50961 Fe Zn 8b specification, things go wrong. And crucially, what does the lowercase signify for
The designation DIN 50961 Fe/Zn 8b describes a specific electroplated zinc coating on steel (or iron) parts. The standard (DIN 50961, now largely superseded by DIN EN ISO 4041 but still widely used in industry) defines the coating thickness, corrosion resistance requirements, and post-treatment (chromating).