 Model Number |
KS D3605,JIS G3302,ASTM A653,EN 10142,10147 |
This has excellent corrosion resistance due to a self sacrifice method of zinc as a product coated with zinc film on the cold rolled products.
Producible standards
|
ITEM
|
RANGE
|
|
Thickness(mm)
|
0.23~2.3
|
|
Width(mm)
|
500~1,270
|
|
Length(mm)
|
600~5,000
|
|
Unit coil weight(tons)
|
12
|
|
Coating thickness (both side)
|
76~720
|
|
Coil inner diameter(mm)
|
508 / 610 or 762
|
Coating treatment
- Regular Spangle - Minimized Spangle - Zero Spangle – Galvannealed
Finishing
- No treatment/oil treatment Dry / Oiled - Chromate treatment - Phosphate treatment - Lubricated resin - Organic coating - Galva clean
Corrosion Resistance
This has a characteristic to protect base metal (Fe) due to the corrosion resistance of zinc itself and the effective sacrificial positive pole action of zinc. Chromium film post-treatment(chromate) : This protects a galvanized steel layer with the net type films by the dehydrated contraction reaction and hydrogen bond via trivalent chromium compound so as to enhance corrosion resistance more. Especially, chromium films contribute to the corrosion resistance with the self healing effect via hexavalent chromium which is soluble and the barrier effect via trivalent chromium which is insoluble.
Formability
This is produced through continuous annealing, tempering, and post-treatment process so as to have very excellent formability.
|
Material Type
|
Hardness (Hr-B)
|
Yield point (kg/mm2)
|
Tensile strength (kg/mm2)
|
Elongation (%)
|
|
General CQ
|
50 ~ 60
|
25 ~ 35
|
35 ~ 45
|
32 ~ 40
|
|
DQ for processing
|
45 ~ 55
|
20 ~ 30
|
30 ~ 40
|
36 ~ 44
|
|
DDQ for deep processing
|
30 ~ 40
|
12 ~ 30
|
28 ~ 33
|
42 ~ 50
|
|
SQ for structure
|
|
|
|
|
Weldability
The general hot-dip galvanized steel sheet is a little less in formability than cold rolled steel sheet, but it can give formability equal to or more than the cold rolled steel sheet due to improvement in manufacturing equipment and technology recently. Especially, the alloy hot-dip galvanized steel sheet has the most excellent weldability among coated steel sheets. Alloy treatment (galvannealed : GA) : This is much more excellent in weldability than general hot-dip galvanized steel sheet or electric galvanized steel sheet by making zinc film and base metal (Fe) an alloy through a high frequency induction heating method for the first time in the world.
Product materials
1. Material specification (Classification)
|
Classification
|
KS
|
JIS
|
ASTM
|
EN
|
|
D 3506
|
G 3302
|
A653
|
10142,10147
|
|
Commercial quality
|
SGCC
|
SGCC
|
CS
|
DX51D
|
|
Lock forming quality
|
SGCD1
|
SGCD1
|
CS
|
DX51D
|
|
Drawing quality
|
SGCD2
|
SGCD2
|
FS
|
DX52D
|
|
Deep drawing quality
|
SGCD3
|
SGCD3
|
|
|
|
Deep drawing special killed
|
SGCD3-N
|
SGCD3-N
|
DDS
|
DX53D
|
|
Structural quality
|
SGC340∼570
|
SGC340∼570
|
GRADE230 ∼550
|
S220∼S550
|
|
High tension steel
|
SGH 35 ~ 58
|
|
|
|
2. Mechanical Property
|
Division
|
Material Type
|
Yield Point (N/mm2)
|
Tensile Strength (N/mm2)
|
Elongation (%)
|
Test Piece
|
|
Nominal Thickness (mm)
|
|
0.25~ 0.40
|
0.40~ 0.60
|
0.60~ 1.0
|
1.0~ 1.6
|
1.6~ 2.5
|
2.5 over
|
|
KS D 3506 / JIS G 3302
|
SGCC
|
|
|
|
|
|
|
|
|
No.5 CutIn RollingDirection
|
|
SGCD1
|
|
270
|
|
34
|
36
|
37
|
38
|
|
|
SGCD2
|
|
270
|
|
36
|
38
|
39
|
40
|
|
|
SGCD3
|
|
270
|
|
38
|
40
|
41
|
42
|
|
|
SGC340
|
245
|
340
|
20
|
20
|
20
|
20
|
20
|
20
|
|
SGC400
|
295
|
400
|
18
|
18
|
18
|
18
|
18
|
18
|
|
SGC440
|
335
|
440
|
18
|
18
|
18
|
18
|
18
|
18
|
|
SGC490
|
365
|
490
|
16
|
16
|
16
|
16
|
16
|
16
|
|
SGC570
|
560
|
570
|
|
|
|
|
|
|
|
ASTM
|
CS Type A
|
170
|
|
20
|
Cu shall not exceed 0.50% on heat analysis
|
|
CS Type B
|
205
|
|
20
|
|
CS Type C
|
170
|
|
15
|
|
FS Type A
|
170/240
|
|
26
|
|
FS Type B
|
170/240
|
|
26
|
|
DDS
|
140/170
|
|
32
|
|
EDDS
|
105/170
|
|
40
|
|
Gr230 (Gr-A)
|
230
|
310
|
20
|
|
Gr255 (Gr-B)
|
255
|
360
|
18
|
|
Gr275 (Gr-C)
|
275
|
380
|
16
|
|
Gr340 C1 (Gr-D)
|
340
|
450
|
12
|
|
Gr550 (Gr-E)
|
570
|
570
|
12
|
|
Gr340 C3 (Gr-F)
|
480
|
480
|
12
|
â» In case of using cold rolled raw plates
Product figures
1. Surface Finish
|
Surface finish
|
Characteristics characteristics
|
Applications
|
Coating layer structure
|
|
Regular Spangle
|
- Original patterns and gross
- Excellent anti-corrosive property
|
- Architectural material - Pipe
|
Zn Steel Zn
|
|
Zero Spangle
|
- Fine crystals by suppressing crystal growth during solidification of zinc - Even surface
|
- Furniture and office appliances - Inner/outer plates of home appliances
|
|
Extra Smooth
|
- Execution of skin pass on the Zero Spangle surface - Beautiful surface and excellent painting
|
- Home appliances - Painted steel sheet (PCM) material
|
|
Galvannealed
|
- Maximization of welding and painting property with alloy treatment of iron property and zinc
|
- Inner/outer plates of automobiles - Home appliances
|
Zn-Fe alloy layer steel Zn-Fe alloy layer
|
2. Coating attachment quantity/coating thicknes
|
Division
|
Attachment quantity marking symbol on both sides
|
Average attachment quantity of 3 point method
|
Minimum attachment quantity of 1 point method on both sides
|
Coating thickness
|
|
Non-alloy
|
Z08
|
80
|
68
|
0.017
|
|
Z10
|
100
|
85
|
0.021
|
|
Z12
|
120
|
102
|
0.026
|
|
Z18
|
180
|
153
|
0.034
|
|
Z20
|
200
|
170
|
0.040
|
|
Z22
|
220
|
187
|
0.043
|
|
Z25
|
250
|
213
|
0.049
|
|
Z27
|
270
|
234
|
0.054
|
|
Z35
|
350
|
298
|
0.064
|
|
Z45
|
450
|
383
|
0.080
|
|
Alloy
|
F06
|
60
|
51
|
0.013
|
|
F08
|
80
|
68
|
0.017
|
|
F10
|
100
|
85
|
0.021
|
|
F12
|
120
|
102
|
0.034
|
3. Dimension tolerances
Thickness tolerances
|
Indicated thickness
|
Width
|
|
W < 630
|
630 ≤ W < 1000
|
1000 ≤ W < 1250
|
1250 ≤ W < 1600
|
1600 ≤ W
|
|
T < 0.25
|
± 0.04
|
± 0.04
|
± 0.04
|
|
|
|
0.25 ≤ T < 0.40
|
± 0.05
|
± 0.05
|
± 0.05
|
± 0.06
|
|
|
0.40 ≤ T < 0.60
|
± 0.06
|
± 0.06
|
± 0.06
|
± 0.07
|
± 0.08
|
|
0.60 ≤ T < 0.80
|
± 0.07
|
± 0.07
|
± 0.07
|
± 0.07
|
± 0.08
|
|
0.80 ≤ T < 1.00
|
± 0.07
|
± 0.07
|
± 0.08
|
± 0.09
|
± 0.10
|
|
0.10 ≤ T < 1.25
|
± 0.08
|
± 0.08
|
± 0.09
|
± 0.10
|
± 0.12
|
|
1.25 ≤ T < 1.60
|
± 0.09
|
± 0.10
|
± 0.11
|
± 0.12
|
± 0.14
|
|
1.60 ≤ T < 2.00
|
± 0.11
|
± 0.12
|
± 0.13
|
± 0.14
|
± 0.16
|
|
2.00 ≤ T < 2.50
|
± 0.13
|
± 0.14
|
± 0.15
|
± 0.16
|
± 0.18
|
|
2.50 ≤ T < 3.15
|
± 0.15
|
± 0.16
|
± 0.17
|
± 0.18
|
± 0.21
|
|
3.15 ≤ T
|
± 0.17
|
± 0.18
|
± 0.20
|
± 0.21
|
|
Width tolerances unit: mm
|
In case of using cold rolled raw plates
|
|
W ≤ 1500
|
W > 1500
|
|
0, +7
|
0, +10
|
4. Shape tolerances
Straightness
|
Width / kind
|
Wave
|
Edge wave
|
Center wave
|
|
W < 1000
|
12 or less
|
8 or less
|
6 or less
|
|
1000 ≤ W < 1250
|
15 or less
|
10 or less
|
8 or less
|
|
W ≥ 1250
|
15 or less
|
12 or less
|
9
|
Perpendicularity
Perpendicularity is indicated as A/W x 100(%) in the figure and shall not exceed 1%.
Flatness
|
Width / kind
|
Wave
|
Edge wave
|
Center wave
|
|
W < 1000
|
12 or less
|
8 or less
|
6 or less
|
|
1000 ≤ W < 1250
|
15 or less
|
10 or less
|
8 or less
|
|
W ≥ 1250
|
15 or less
|
12 or less
|
9 or less
|
|
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