Explanatory notes
… by weight over each of the other elements and which do not comply with the chemical composition of steel as defined in … Concentric hollow products, of uniform cross‑section with only one enclosed void along their whole length, having … inner and outer surfaces of the same form. Steel tubes are mainly of circular, oval, rectangular (including square) …Legal note
… by weight over each of the other elements and which do not comply with the chemical composition of steel as defined in …