Shandong Duohe Import And Export Co., Ltd.
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What is the difference between GI and hot-dip galvanized?
The key difference between galvanized and hot dip galvanized is that most galvanized materials have a smooth
and sharp finishing, whereas hot sip galvanized structures have a rough finishing. Galvanization is a process
of preventing metal surfaces from corrosion.
Which is better galvanized or hot dipped galvanized?
As mentioned, pre-galvanized components are usually only immersed in the galvanizing bath for a very short time, resulting in a relatively thin coating. The thicker zinc coating produced by hot dip galvanization offers improved rust and corrosion protection versus pre-galvanization.
Product description
| Grade | DX51D, DX52D, DX53D, DX54D S220GD, S250GD, S280GD, S350GD, S350GD, S550GD SGCC, SGHC, SGCH, SGH340, SGH400, SGH440, SGH490,SGH540, SGCD1, SGCD2, SGCD3, SGC340, SGC340 , SGC490, SGC570 SQ CR22 (230), SQ CR22 (255), SQ CR40 (275), SQ CR50 (340), SQ CR80(550), CQ, FS, DDS, EDDS, SQ CR33 (230), SQ CR37 (255), SQCR40 (275), SQ CR50 (340), SQ CR80 (550) |
| Width | 600-1200mm or as required |
| Thickness | 0.12-4mm |
| Zinc coating | 30-275g/m2 |
| Surface treatment | Passivation(C), Oiling(O), Lacquer sealing(L), Phosphating(P), Untreated(U) |
| Hardness | Soft hard(HRB60), Medium hard(HRB60-85), Full hard(HRB85-95) |
| Spangle | zero spangle / minimized spangle / regular spangle/ big spangle |
| ID coil | 508mm or 610mm |
| Coil weight | 2-8 MT per coil. According to the customer's requirements |
| Package: | Standard export package (Plastic film in the first layer,second layer is Kraft paper. Third layer is galvanized sheet) |
| Application: | Construction, light industry, automobile, agriculture, animal husbandry, fishery and commercial industries |
| Chemical Composition | ||||||
| GRADE | C | Si | Mn | P | S | Ti |
| SGCC/DX51D+Z | ≤0.10 | ≤0.50 | ≤0.60 | ≤0.10 | ≤0.030 | ≤0.020 |
| DX52D+Z | ≤0.10 | ≤0.50 | ≤0.60 | ≤0.10 | ≤0.030 | ≤0.020 |
| SGCD/DX53D+Z | ≤0.10 | ≤0.30 | ≤0.50 | ≤0.05 | ≤0.030 | ≤0.020 |
| SGCE/DX54D+Z | ≤0.10 | ≤0.30 | ≤0.30 | ≤0.03 | ≤0.020 | ≤0.020 |
| DX56D+Z | ≤0.10 | ≤0.30 | ≤0.30 | ≤0.03 | ≤0.020 | ≤0.020 |
| Structural | ≤0.20 | ≤0.60 | ≤1.70 | ≤0.10 | ≤0.045 | |
| Mechanical Properties | ||||||
| GRADE | Yield Strength MPa | Tensile Strength MPa | Elongation % | |||
| SGCC(DX51D+Z) | ≥205 | ≥270 | - | |||
| SGCD(DX53D+Z) | - | ≥270 | 38 | |||
| SGCE(DX54D+Z) | - | ≥270 | 40 | |||
| DX56D+Z | - | ≥270 | 42 | |||
