GALVANZIED STEEL COIL
Hangzhou kaihao technology co.,Ltd can supply galvanized steel in coil form with thickness up to 6.0mm.
The pre-galvanizing coating mass can reach 600g/㎡.
With sheets, post-galvanizing coating mass can reach 6000g/㎡.
Highest tensile strength can be over 1200 MPa.
30000 tons daily stock with nearly all grades, fast delivery.
Contact:
Chris Fang：
Mob / Whatsapp / Wechat :0086 139 6807 7915 kaihaotech6@163.com
Galvanized Steel Coil
Galvanized steel coil (GI) is a flat-rolled metal sheet that has been coated with a layer of zinc through a process called galvanization. Galvanization involves immersing the steel coil in a bath of molten zinc, which creates a protective layer of zinc coating on the surface of the steel, offering excellent corrosion resistance and durability. This coating not only protects the steel from environmental factors but also enhances its aesthetic appeal with a shiny, metallic finish.
Galvanized Steel Coil is pivotal in construction for elements like roofing and framing, and in the automotive sector for body parts and structural components. Its versatility also extends to household appliances, HVAC systems, and packaging, underpinning its broad application scope due to its strength and corrosion resistance.
specifications
| Steel Grade |
DX51D, DX52D, DX53D, DX54D, S250GD, S350GD, S450GD, S550GD, SGCC, SGCH, or others |
| Spangle | Regular spangle or Zero spangle |
| Coating | Z20 – Z275 G/M2 |
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| GRADE | Standard | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation after fracture A (%) | Typical Applications | ||||||
| DX51D+Z | EN 10346 | 240‑380 | 270‑500 | ≥22 | General bending, sheet metal, cabinet, ventilation duct, most common grade | ||||||
| DX52D+Z | EN 10346 | 140‑300 | 270‑420 | ≥26 | Good stamping performance, home appliance housing, shallow‑formed parts | ||||||
| DX53D+Z | EN 10346 | 140‑260 | 270‑380 | ≥30 | Deep stamping, complex home‑appliance housings | ||||||
| S220GD+Z | EN 10346 | ≥220 | ≥300 | ≥20 | General structural components | ||||||
| S250GD+Z | EN 10346 | ≥250 | ≥330 | ≥19 | Steel structures, supports, roof purlins | ||||||
| S350GD+Z | EN 10346 | ≥350 | ≥420 | ≥16 | High‑strength galvanized steel, building components, storage racks, equipment bases | ||||||
| SGCC | JIS G3302 | ≤290 | ≥270 | ≥22 | JIS commercial grade, home appliances, sheet metal (cold‑rolled substrate) | ||||||
| SGHC | JIS G3302 | ‑ | ≥270 | ≥18 | Galvanized with pickled hot‑rolled substrate, heavy‑gauge structural parts | ||||||
| CS‑Type A | ASTM A653 | ‑ | ≥270 | ≥20 | ASTM commercial grade | ||||||
| FS‑Type A | ASTM A653 | ‑ | ≥270 | ≥22 | ASTM forming grade for stamped parts | ||||||
| GALVANZIED STEEL COIL Zinc Spangle | |||||||||||
| Spangle Type | English Name | Formation Mechanism | Surface Characteristics | Main Applications | Common Grades under Relevant Standards | ||||||
| Large Spangle | Regular / Large Spangle | Relatively high lead (Pb) content in zinc bath. Slow solidification forms coarse dendritic crystals. | Distinct & shiny spangles, bold grain patterns | Building envelopes, pre‑painted steel substrates, general sheet‑metal work | DX51D+Z, SGCC | ||||||
| Minimized Spangle | Minimized Spangle | Control cooling rate or add inhibiting elements (Sb‑antimony, Bi‑bismuth) to refine spangle grains. | Fine & uniform spangles, soft luster | Home appliance housings, light‑steel keels, distribution boxes | DX51D+Z Minimized Spangle | ||||||
| Zero / Spangle‑free | Zero / Spangle‑free | Rapid mist‑spray cooling after galvanizing; crystal nuclei cannot grow up. | Uniform surface with no visible patterns, silver‑grey matte finish | Home‑appliance panels, automotive outer panels (for painting) | DX52D/53D+Z, SGCC Spangle‑free | ||||||
| Galvannealed (GA) | Galvannealed (GA) | Alloy annealing at 500 °C after galvanizing; inter‑diffusion of zinc‑iron forms alloy layer. | No spangle, grey‑white dull finish, matt texture | Automotive structural parts, components requiring welding & painting | DX51D+ZF, GA | ||||||
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