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 Product Features |
| Galvannealed steel sheet offers significant improvements in weldability and paintability by undergoing a simple pre-treatment process. After the coating process a special heat treatment forms an alloy layer between the galvanized layer and the metal base. |
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 Superior weldability |
| The weldability of galvanized sheet is drastically compromised because of the absorption of zinc coating onto the welding electrode. Galvannealed plates have significantly improved weldability because of the high melting point of FeZn alloy on the surface, which prevents electrode contamination.
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| Greater peeling resistance |
| Due to exceptional paint adhesiveness resulting from the formation of alloy layers, the peeling resistance during the bending and folding treatment is greatly enhanced, compared to regular hot-dipped sheet.
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| Superior paint adhesiveness and corrosion resistance
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| The rough alloy layers of the galvannealed sheet surface facilitates the reaction to the pre-treatment (phosphate and chromate treatment), improving paint adhesiveness and corrosion resistance.
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| Improvements in powdering
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| The FeZn alloy layer generally displays a high level of hardness and low ductility, causing the alloy layer on the surface to peel off as powder during deep drawing. Dongbu Steel’s #3CGL uses the high frequency induction heat method during the heat treatment that follows the coating phase, which drastically lowers the degree of powdering, presenting an elegant steel surface.
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Powdering can be improved if a low coating material (F 10 or lower) is used during deep drawing.
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| Cross Section |
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| Production Availability |
| 3CGL (Asan Bay Works) |
Strip Thickness
|
0.30 ~ 2.0mm |
| Strip
Width |
600 ~ 1600mm |
Coating
Mass
|
GI : 60 ~ 720g/m², GA: 60 ~ 180g/m², SGL
: 60 ~ 250g/m²
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Coil
I.D
|
508mm and 610mm
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Coil
O.D
|
2200mm max
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Coil
Mass
|
25 tons max |
Steel
Grade
|
CQ, LFQ, DQ, DDQ, EDDQ, SQ |
Main
Products
|
GI Zero Spangle
Galvannealed
SuperGalum |
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| Production Availability |
| Specifications |
| DesignationType |
KS D
3506 |
JIS G 3302 |
ASTM |
EN |
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cold- rolled base metal used
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hot- rolled base metal used
|
cold- rolled base metal used
|
hot- rolled base metal used,
|
OLD |
A653-97 |
| Commercial Quality |
SGCC |
SGHC
|
SGCC
|
SGHC
|
A 526
|
CS Type A & B
|
EN 10142 |
| Lock Forming Quality |
- |
- |
- |
- |
A 527
|
CS Type C
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| Commercial Soft Quality |
SGCC-L |
- |
SGCC-L |
- |
A 526-L
|
FS Type A & B
|
EN 10142 |
| Commercial Hard Quality |
SGCH |
- |
SGCH
|
- |
- |
- |
- |
| Drawing Quality |
SGCD1
SGCD2
SGCD3 |
- |
SGCD1
SGCD2
SGCD3 |
- |
A 528
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DDS
EDDS
|
EN 10142
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| Structural Quality |
SGC340
SGC400
SGC440
SGC490
SGC570
|
SGH340
SGH400
SGH440
SGH490
SGH540
|
SGC340
SGC400
SGC440
SGC490
SGC570
|
SGH340
SGH400
SGH440
SGH490
SGH540
|
A446 |
Grade 230
Grade 255
Grade 275
Grade 340
class
1,2,3
Grade 550
|
EN 10147 |
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| Surface Finish |
| Type |
Surface Finish |
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Alloy coated iron-zinc
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Galvannealed steel sheet has a highly workable iron-zinc
alloy layer. Excellent paint-adherence properties, corrosion
resistance and weldability make it ideal for use in
home electrical appliances and buildings.
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| Surface Treatment |
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Type
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Application
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Chromate
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General
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Non-treated
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General painting
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Organic
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Drawing
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| Oiling |
Oiling Type |
Not oiled |
oiled |
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| Surface Finish and Application |
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Classification
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Weight of zinc coating
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Surface Finish
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Quality
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Application
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| Galvannealed Finish |
F04~F18 |
|
Commercial Quality
Drawing
Quality
Structural Quality
|
Home electrical appliances (Washer, Microwave
oven) Building materials, automobile parts, various fuel
tanks |
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| Post Treatment |
A variety of post treatments are available depending on the use of products.
Oiling : Automobiles
Chromate : Home electrical appliances, painting
Organic Coating : Surface coating, improving corrosion resistance, painting, and lubrication
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| Applications |
| Electrical appliances : interior and exterior plates of washers, refrigerators, air conditioners, vending machines.
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| Automotive components : parts that require welding such as motor housing and brackets
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| Assembled metal and other : fireproof doors, steel furniture |
| Color painted material
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| Exterior plates of automobiles
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| Applied Specifications |
KS D 3506
Remarks: KS D 3053-88
JIS G 3302-98
ASTM A653/A653M-97
EN
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| Production process |
 Click on the image to view the production process.
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