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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.

 

 

 

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.

 

 

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.

 

 

Superior paint adhesiveness and corrosion resistance
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.

 

 

Improvements in powdering
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.

Powdering can be improved if a low coating material (F 10 or lower) is used during deep drawing.

 

 


Cross Section

 

 

 


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

Coil I.D

508mm and 610mm

Coil O.D

2200mm max

Coil Mass
25 tons max
Steel Grade
CQ, LFQ, DQ, DDQ, EDDQ, SQ
Main Products
GI Zero Spangle
Galvannealed
SuperGalum

 

 


Production Availability

 

 

Specifications

DesignationType KS D 3506 JIS G 3302 ASTM EN

cold- rolled base metal used

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
 
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
DDS
EDDS
EN 10142
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

 

 

Surface Finish

Type Surface Finish

Alloy coated iron-zinc

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.

 

 

Surface Treatment

Type

Application

Chromate

General

Non-treated

General painting

Organic

Drawing

 

 

Oiling

Oiling Type

Not oiled oiled

 

 

 

Surface Finish and Application

Classification

Weight of zinc coating

Surface Finish

Quality

Application

Galvannealed Finish F04~F18
Commercial Quality
Drawing Quality
Structural Quality
Home electrical appliances (Washer, Microwave oven) Building materials, automobile parts, various fuel tanks

 

 

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

 

 


Applications

 

 

Electrical appliances : interior and exterior plates of washers, refrigerators, air conditioners, vending machines.

 

 

 

 

Automotive components : parts that require welding such as motor housing and brackets

 

 

 

Assembled metal and other : fireproof doors, steel furniture

 

Color painted material

 

Exterior plates of automobiles

 

 


Applied Specifications

 

 

    • KS D 3506
    • Remarks: KS D 3053-88
    • JIS G 3302-98
    • ASTM A653/A653M-97
    • EN