Coated Sheets GI Sheets Hot Dip Galvanized Steel Sheet Plates
Introduction of galvanised steel sheet :
Galvanized steel sheet is one of the most widely used products,
used extensively in the building sector, automotive, agricultural
and other areas where the steel needs to be protected from
corrosion.
Description of galvanised steel sheet :
Thickness | 0.13-3.0mm |
Width | Galvanized steel strip:24-600 mm; galvanized steel coil:600-1250mm |
Coil weight | Usually is 3-4.5 tons,the max coil is 10 tons |
Zn coating | 0.13-0.8 mm is 30-150 g/m2; 0.8-1.5 mm is 30-180 g/m2;1.5-6.0 mm is
30-275 g/m2 |
Coil ID | 600-1500 mm,Normal width is 91 4/1000/1219/1250/1500 mm |
Steel grade | DX51D,DX52D,DC01,DC02,SGHC |
Surface | regular/mini/big/zero spangle,skin pass, chromated, unoiled, dry |
Packaging | seaworthy export standard package, or according to the
customers’requirement |
Delivery time | With 15 –25 days after receipt of deposit or L/C |
Details of galvanised steel sheet :
|
|---|
| Total Coated | Area Per Ton | % Area more in Galvalume® over Galvanised |
|---|
| Sheet Thickness | Galvalume® Coated | G-90 Galvanized |
|---|
| mm | Sq.meter | Sq.meter | % |
| 0.3 | 406 | 384 | 6 |
| 0.38 | 320 | 306 | 5 |
| 0.64 | 188 | 183 | 3 |
| 1 | 116 | 114 | 2 |
Characteristics of galvanised steel sheet :
| Spangle | Surface Treatment | Oiling | Surface Roughness | Cold Treatment | Edge Condition |
| Regular / Minimized / Suppressed | Chromated Cr+6 / Chromated
Cr+3 (as per ROHS norms) /
Acrylic coating AFP (Cr+6) | Oiled / Unoiled | 0.6 - 2.0 microns
(for Skin Passed) | Non Stretch Leveled / Stretch Leveled / Skin Passed | Slit / Mill edge |
Advantage of galvanised steel sheet :
- Strong corrosion resistance, 3 times that of galvanized steel coil.
- The density of 55% aluminum is smaller than the density of zinc.
When the weight is the same and the thickness of the plating layer
is the same, the area of the galvalume steel sheet is 3% or larger
than that of the galvanized steel sheet.
Surface Treatment Of galvanised steel sheet :
| Item | Classification | Symbol |
| Coating type | Al-Zn alloy | AZ |
| Surface finish | Regular spangle | R |
| Minimized spangle | M |
| Skin passed | S |
| Surface treatment | Chromate passivated | c |
| Non-chromate passivated | C5 |
| Chromate passivated + oiling | CO |
| Non-chromate passivated+oiling | CO5 |
| Anti-fingerprint | N |
| Non-chromate anti-fingerprint | N5 |
| Non-chromate high weather resistance anti-fingerprint | NW |
| Oiling | 0 |
| No treatment | U |
Detailed Steps Of The galvanised steel sheet Processing
Step 1:
Pre-treatment: After the cold-rolled coil arrives in the galvalume
workshop, after passing through the uncoiler, through the
degreasing section and the reduction furnace, the steel coil is
cleaned and its components are reduced to the extent that it can be
galvanized.
Step 2:
Central section: The most critical technology is this step. After
passing through the zinc pot, a layer of zinc layer is plated on
the surface of the steel plate. After coming out of the zinc pot,
it is cooled and shaped by the cooling tower.
Step 3:
Post-processing: The steel plate finally comes to the
post-processing stage after various processes. After finishing,
straightening and passivation, and finally coiling.
Galvanised steel sheet Features:
People use it as material for heat-insulation for its thermal
reflectivity as high as twice the galvanized steel sheet.
The aluzinc steel sheet could bear above 300℃ high temperature with
its good performance in heat-resistance, quite similar to the
aluminized steel sheet’s performance in oxidation-resistance under
high temperature. It is often used for chimney pipe, oven,
illominator, and fluorescent lamp cover.
- Corrosive-resistance performance:
The essential of galvalume steel coil’s corrosive-resistance lies
at aluminium’s protective property. Once the zinc come under
abrasion, the aluminium would form a layer of densified oxidized
aluminium, preventing the interior from further corrosion.
The density of 55%AL-Zn is smaller than Zn, therefore, with the
same weight and thickness of coating, the galvalume steel sheet is
3% larger in area than that of galvanized steel sheet.
There is perfect adhesiveness between galvalume sheet and paint,
saving the process of pre-treatment and weathering for painting
work.
The coating material on the galvalume steel sheet is outstanding in
its adhesiveness, which could be directly tarring on the
advertising board and commonly used board with no pre-treatment
such as weathering process.
- The galvalume steel sheet’s surface is luxury in silver colored
appearance.
- Galvalume steel sheet and galvanized steel sheet are similar in
performance of processability and painting.
Here are the pictures of our Mill as reference :
FAQ:
Q1:What are your company's main products?
A2: Our main products are Carbon Steel Coil/Sheet,Galvanized Steel
Coil/Sheet,Stainless Steel Coil/Sheet, round/square pipe, bar,
channel, perforated shseet etc.
Q3: How do you control quality?
A3: Mill Test Certification is supplied with shipment, Third Party
Inspection is available. and we also get ISO,SGS,Alibaba Verified.
Q4:What are the advantages of your company?
A4: We have many professionals, technical personnel, more
competitive prices and best after-dales service than other steel
companies.
Q5: How to get samples?
A5:FREE samples are available for your checking and testing.
