In machining and industrial hardware supply, after customers finish confirming RoHS, REACH, and PFAS Free, the next question that often comes up is: “Do you have an EN 10204 3.1 material certificate?” For many suppliers, this document looks like just an English report—but in reality, it often becomes a key factor in whether the customer will move forward with cooperation. --- 1. What Is EN 10204—What Does It Actually Control? EN 10204 is a document standard established by the