Galvanized Steel Coils Description
Galvanized steel coil is a metal coil with a layer of zinc on the surface of cold-rolled or hot-rolled steel sheet. The zinc layer is formed by immersing the steel coil in molten zinc liquid to protect against corrosion. This process is usually called hot-dip galvanizing, to form a strong zinc layer on the surface to prevent the steel from reacting with oxygen and water vapour in the air and extend the service life of the steel.
GI coil has a shiny, smooth finish. Galvanized steel coils are used in a wide range of industries, including construction, automotive, solar and other applications where the steel will be exposed to weather or other elements.
Galvanized Coil Specification
| Product Name | Galvanized Steel Coil |
| Standard | EN10346, JIS G3302, ASTM A653,AS 1397,GB/T 2518 |
| Steel Grade | Dx51D, Dx52D, Dx53D, DX54D,DX55D,DX56D,DX57D, S220GD, S250GD, S280GD, S320GD,S350GD, S390GD,S420GD,S450GD,,S550GD, SGHC, SGH340, SGH400, SGH440, SGH490,SGH540, SGCC,SGCH,SGCD1, SGCD2, SGCD3, SGCD4,SGC340, SGC400 , SGC440, SGC490,SGC570; CS-A,CS-B,CS-C,Grade 33,grade 37.grade 40,garde 50,grade60,grade70,grade80 G1,G2,G3,G250,G300,G450,G550; As Requirement |
| Type | Coil/Sheet/Plate/Strip |
| Thickness | 0.12mm-6.0mm or 0.8mm/1.0mm/1.2mm/1.5mm/2.0mm |
| Width | 600mm-1500mm or 914mm/1000mm/1200mm/1219mm/1220mm |
| Zinc Coating | Z30g/m2-Z600g/m2 |
| Surface Structure | Normal spangle (N),, spangle-free(FS),Zero Spangel |
| Surface Structure | Oiled (O),Passivated(C),Passivated and oiled (CO) ,Sealed (S),Phosphate (P),Phoaphte and oiled (CO) |
| Coil Weight | 3-8 tons,or as requirement |
| Coil ID | 508mm/610mm |
Galvanized Coil Surface Structure: Small,Large,Zero.Select as per your requirement
Zinc Spangle is a surface morphology of hot-dip pure zinc coil, when the steel strip passes through the zinc pot, the surface is coated with liquid zinc, and then in the process of natural solidification of the zinc layer, the zinc grain nucleus grows and zinc spangle appears.The surface of the hot-dip pure galvanized coils produced had zinc sparks of various sizes and shapes.
Galvanized steel sheet is cut from galvanized steel coil, the base material is cold rolled steel, it has good processing performance. The galvanized sheet coated with a zinc layer,features a smooth, flat,uniform thickness, strong adhesion, no peeling during processing, good corrosion resistance,and excellent adhesion to paint film. It can withstand high temperatures up to 315 ℃ and has excellent surface conductivity. The surface is smooth and clean, the size is accurate, the board surface is straight, the spangles are even and beautiful.
GI Coil Surface Structure
Galvanized Steel Features
Galvanized steel coils have high adhesion,corrosion resistance, and precisely controlled coating thickness. In addition,Galvanized steel is easy to process and weld, and also has a long service life when exposed to the atmosphere.
- Excellent anti-corrosion:
Galvanised Steel has excellent corrosion resistance,the zinc coating layer has better electrochemical protection on steel than painting and plastic coating.It can last for decades of years without any problem of peeling off,and also higher collosion and scratch resistance.
Not only will the zinc coating play the role of a physical barrier but also protects the steel underneath through electrochemical reactions (sacrificial anode action) when the coating is scratched or damaged.
Hot-dip galvanized steel coils maintain the processability of steel, and the zinc layer is thin and uniform, which does not affect the performance of steel during processing and forming.
Galvanized steel has good thermal resistance,can be used for long time without discoloration below 230℃, and it will discolor when it exceeds 250℃.
GI Sheet Processing Service
We offer value-added services including polishing, annealing, heat treatment, and welding for GI steel.
Process Service:Bending,Welding,Decoiling,Punching,Cutting,Moulding,or as requirement
GI Coil Packing
| Packing Details | Standard Seaworthy Package or according to customer's requirements |
| Container Size | 20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High) 24-26CBM
40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High) 54CBM
40ft HC:12032mm(Length)x2352mm(Width)x2698mm(High) 68CBM |
Galvanized Coil Material Testing
- Mechanical Testing Such as Tensile of Area
- Hardness Test
- Chemical Analysis – Spectro Analysis
- Positive Material Identification – PMI Testing
- Hardness Test
- Micro and MacroTest
- Pitting Resistance Test
- Flaring Test
- Intergranular Corrosion (IGC) Test
FAQ
Q: Do you provide samples ? is it free or extra ?
A: The sample could provide for customer free,but the freight will be covered by customer account.
Q: Do you accept the third-party inspection?
A: Yes,absolutely we accept.
Q: How could you guarantee your products?
A: Each piece of products is manufactured by certified workshops, inspected by HNJBL piece by piece according to national QA/QC standard. We also could issue the warranty to customer to guarantee the quality.
Q: How can I get your quotation as soon as possible?
A: The email will be checked within 6 hours,and the Wechat and WhatsApp will be online 24 hours.Please send us your requirement and order information,specification(Steel grade,size,quantity,destination port),we will work out the best price soon.
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ASTM A653 Galvannealed Sheet DX51D Z150 Galvanized Sheet Coil Images
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