What is hot dip galvanizing steel?
Hot dip galvanizing is to first pickling the steel to remove the iron oxide on the surface of the steel, after pickling, through ammonium chloride or zinc chloride aqueous solution or ammonium chloride and zinc chloride mixed aqueous solution for cleaning, and then into the hot dip plating tank to complete galvanizing. The molten zinc reacts with the iron matrix to form an alloy layer, which binds the substrate to the coating. Usually used in construction, home appliances, automobiles, power industry and other fields.

| Thick | 0.3 ~3.0 mm |
| Width | 600-1500 mm |
| Zinc Coating | 30~275G/M2 |
| Coil ID | 508 / 610MM |
| Coil Weight | 3-5 Tons |
| Standard | ASTM-A653; JIS G3302; EN10147; EN10326etc |
| Payment Terms | T/T, LC,DP. |
| Regular Order | 25 tons or one container, for less quantity, to contact with us for details |
| Hardness | Soft hard(HRB60),medium hard(HRB60-85),full hard(HRB85-95) |
| Surface Structure | Regular spangle,Minimum spangle, Zero spangle, Big spangle |
| Surface Treatment | Chromated/Non-Chromated, Oiled/Non-oiled, Skin pass |
1.Standard
| Content | |||
| Material: | SG550/SG280/SG350DX51D+Z | SGCC/ CS TYPE | |
| Finish | NBMinimized Spangle (M) | ||
| Surface Treatment | Chemically Passivated (C) | ||
| Oil | Not Oiled | ||
| Zinc | Z30--275 | ||
| Thickness tolerances | Normal thickness tolerances | 0.40 < thickness ≤ 0.60 | ± 0.060 |
| 0.60 < thickness ≤ 0.80 | ± 0.070 | ||
| 0.80 < thickness ≤ 1.00 | ± 0.080 | ||
| 1.00 < thickness ≤ 1.20 | |||
| Width tolerances | 1200 < width ≤ 1500 | 6 ~ 0 | |
2. Chemical composition
| Designation | Chemical composition % by mass max. | ||||||
| Steel grade | C | Si | Mn | P | S | TI | |
| Steel name | Symbols for the types of available coatings | ||||||
| DX51D | +Z | 0.18 | 0.5 | 1.2 | 0.12 | 0.045 | 0.3 |
