The minus sign in front of what 40 galvanized flat steel
Refers to the galvanized flat steel, width 12-300mm, thickness 4-60mm, cross section is rectangular and with pure edge of galvanized steel. Galvanized flat steel can be finished steel, also can be galvanized pipe blank and galvanized belt.
Also called hot galvanized and hot dip galvanizing: hot dip galvanizing is an effective way of metal corrosion, mainly used for metal structure on the facilities of the industry. The steel piece after being cleaned is dipped into the molten zinc liquid at about 500 DEG C so that the zinc coating is adhered on the surface of the steel member so as to prevent corrosion.
In front of a small cross is not a minus sign, but on behalf of the flat symbol. For example, the meaning of "-40*4" galvanized flat steel is: 40 is the width of the section steel, 4 is the thickness of the steel, and the unit is mm.
