HSN CodeHSN Description

3810Pickling preparations for metal surfaces; fluxes and other auxiliary preparations for soldering, brazing or welding;soldering, brazing or welding powders and pastes consisting of metal and other materials; preparations of a kind used as cores or coatings for welding electrodes or rods

730120Sheet piling of iron or steel, whether or not drilled, punched or made from assembled elements; welded angles, shapes and sections, of iron or steel. - angles, shapes and sections

730793Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or steel.
cast fittings: - butt welding fittings

73081000Structures (excluding prefabricated buildings of heading 9406) and parts of structures (for example, bridges and bridge-sections, lock-gates, towers, lattice masts, roofs, roofing frame-works, doors and windows and their frames and thresholds for doors, shutters, balustrades, pillars and columns), of iron or steel; plates, rods, angles, shapes, sections, tubes and the like, prepared for use in structures, of iron or steel - bridges and bridge-sections

73251000Other cast articles of iron or steel - of non-malleable cast iron