3.1 material certified in fasteners
We got such of project for Fasteners in construction or building,bridge,certain wall...Not only detail requirements for screws items size,material,finish treatments,heat treatments,package,and labels,but also detail of documents. All the material will be certified with certificate tayp 3.1 according to the standard.It may be the different standard for welding supplies. In general all the surface treatments of final delivered product must withstand at least 480 hours in a SST salt spray test without the appearance of white or red oxide. Meantime any detail even with Hot-dipped galvanization, chrome-plating ,paint,Non-electrolytic zinc flake coatings,or electrodeposited coating of zinc. What is the 3.1Material? Some purchasers require their purchased material to have specific kinds of material certificates. The BSEN 10204 standard helps these purchasers by identifying a simple code. There are several types of material test report certificates, but the most important are 3.1