3810 Metal-pickling preparations; fluxes etc for soldering, brazing; welding powders, pastes of metal and other materials; preparations used as cores or coatings for welding electrodes or rods

3810.10 Pickling preparations for metal surfaces; soldering, brazing or welding powders and pastes consisting of metal and other materials

• 3810.10.00.10 Tin or zinc based, halide free, surface mount technology processing solder paste: -with metal contents of 87,5 % or more, but not more than 90,1 % by weight, -with an alloy solidus temperature of 210°c or more, -with a viscosity of 178 pa·s or more, but not more than 235 pa·s, -with a particle size of 40 µm or less, -with a silver content either of 3,15 % or more, but not more than 3,5 % by weight for tin based paste or of 0,25 % or more, but not more than 0,28 % by weight for zinc based paste, -with or without bismuth content of 2,55 % or more, but not more than 2,71 % by weight, -with or without copper content of 0,6 % or more, but not more than 0,7 % by weightFree
• 3810.10.00.90 OtherFree

3810.90 Fluxes and other auxiliary preparations; for soldering, brazing or welding, or preparations used as cores or coatings for welding electrodes or rods

• 3810.90.10.00 Preparations of a kind used as cores or coatings for welding electrodes and rodsFree
• 3810.90.90.00 OtherFree