Product introduction |
제목 없음
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SuperGalum is the brand name for 55% aluminum-zinc coated steel
sheet produced by Dongbu Steel.
SuperGalum is highly heat and corrosion resistant, combining
the properties of aluminum which renders increased durability, excellent
heat resistance, and formability, and those of zinc which offers
high heat resistance and excellent corrosion protection. SuperGalum
is three to six times more corrosion resistant than regular zinc
coated steel sheet, with a 20-year warrantee for residential use.
Since 1998, Dongbu Steel has been producing SuperGalum under a licensing
agreement with BIEC International Inc.
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Composition of coated layers
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Composition
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Weigh Ratio (%)
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Capacity Ratio (%)
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aluminum
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55.0
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80 |
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zinc
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43.4
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19 |
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silicon
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1.6 |
1 |
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Cross section of the coated layers
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Product features |
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DExcellent Durability
SuperGalum is three to six times more
corrosion resistant than zinc coated steel sheet of the same thickness.
SuperGalum is backed by a 20-year warrantee for residential use.
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Heat Resistance
The capacity ratio of the aluminum in the coated
layer of SuperGalum is high at over 80%. SuperGalum will withstand a prolonged
temperature of 315 degrees Celsius without discoloration or oxidization. |
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Heat Reflectivity
SuperGalum is highly energy efficient, with
superior heat reflectivity and low heat consumption. |
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Smooth surface
SuperGalum is available in a delicate light silver
spangle, so it is appropriate for decorative use. |
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Economically Efficient
Available in widths of five feet (MAX 1600), SuperGalum reduces the loss and
suite to duct and construction. |
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Excellent paintability
Paint is highly adhesive to the coated layer
of SuperGalum steel sheet, compared to galvanized steel plates |
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Excellent Workability
The workability of SuperGalum is similar to
that of galvanized steel sheet. Its ability to suppress fine cracks on the
coating layer enhances the durability of the treatment area. 
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Specifications |
제목 없음
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Production availability
(CMS Table) |
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Classification by Coating Weight
| KS |
ASTM |
EN |
Single-sided coating thickness(㎛) |
Double-sided |
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Triple-Spot Test |
Single-Spot Test |
| AZ 70 |
- |
- |
9 |
70 |
66 |
| AZ 70 |
- |
- |
12 |
90 |
77 |
| - |
- |
100 |
13 |
100 |
85 |
| AZ 120 |
- |
- |
16 |
120 |
102 |
| AZ 150 |
AZM 150 AZ50
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150 |
20 |
150 |
130(KS:128) |
| - |
AZM 150 AZ50
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- |
22 |
165 |
150 |
| AZ 170 |
- |
- |
22 |
170 |
145 |
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AZM 150 AZ50 |
- |
24 |
180 |
155 |
| - |
- |
185 |
25 |
185 |
160 |
| AZ 200 |
- |
- |
26 |
200 |
170 | |
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Classification by post-treatment
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Classification |
Application |
| Chromate |
Construction, Automotive components |
| No Chromate (+ Oiling)
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Pre-painting |
| Chromate + Oiling |
Exportation |
| No Chromate + Organic
Coating |
Roll Forming | |
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Product Performance |
제목 없음
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Durability
SuperGalum is three to six times more corrosion
resistant than regular zinc coated steel sheet. The shearing surface has
superior corrosion and stretch resistance to aluminum coated steel sheet.
SuperGalum is backed with a 20-year warrantee for residential use.
 Corrosion Test (Outdoor Exposure Test)
Galvanized steel is
subjected to a continuous rate of corrosion, whereas the corrosion of SuperGalum
tends to slow down over time. This outstanding corrosion resistance is
attributed to the anti-corrosion properties in the coated layer.
Exposure test comparing levels of corrosion (test period: 13
years)
Results of exposure tests conducted in a coastal region (Test
period: 13 years)
Salt spray test on SuperGalum Steel Sheet
The initial
occurrence of red rust is considerably after that of galvanized steel
sheet.
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Heat Resistance
The capacity ratio of the aluminum in the coated layer
of SuperGalum is high at over 80%. SuperGalum will withstand a prolonged
temperature of 315 degrees Celsius without discoloration or oxidization.
Rate of oxidization from continuous heat
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Test Adhesion |
Material Thickness(mm) |
weight(g/m²) |
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Super Galum |
0.6 |
200 |
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GI |
0.6 |
350 |
Heat Resistance of Super Galum Steel Sheet
Comparison of corrosion resistance at high temperatures
480℃ ~ 540℃, SuperGalum Steel < Al coated steel
590℃ ~ 650℃,
SuperGalum Steel = Al coated steel
700℃ or higher, SuperGalum Steel > Al
coated steel
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Heat Reflectivity
SuperGalum steel sheet boasts superior heat
reflectivity, which produces increased energy efficiency, making it an excellent
material for the interior of electronic home appliances. Used as a roofing
material, SuperGalum will inhibit the rise of a building’s temperature, thereby
lowering the cost of air conditioning. Food storage buildings made with
SuperGalum enjoy the additional benefit of having stored grains protected from
quality change.
Comparison of heat reflectivity by product
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Product |
Heat Reflectivity Ratio (%) |
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SuperGalum Steel Sheet |
70 ~ 75 |
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Galvanized Steel Sheet |
30 ~ 40 |
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Prepainted Steel Sheet (Silver) |
50 ~ 60 |
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Prepainted Steel Sheet (Gray) |
45 ~ 50 |
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Prepainted Steel Sheet (Blue) |
10 ~ 15 |
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Prepainted Steel Sheet (Brown) |
10 ~ 15 |
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Tile, slate |
10 ~ 20 |
Comparison of heat reflectivity by product
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Product |
Heat Transfer (W/m²) |
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ALCOT Steel Sheet(Type2,300g/m²) |
40 |
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SuperGalum Steel Sheet(150g/m²) |
65 |
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Galvanized Steel Sheet(275g/m²) |
120 |
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Asbestos Ciment |
150 |
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Clay Tile |
150 | |
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Economical Efficiency
The density of the coated layer of SuperGalum
steel, 3.75g/cm² is smaller than that of galvanized steel (7.14g/cm²),
increasing surface area per ton and enhancing the economical efficiency.
Comparison of coating weight and product weight between galvanized steel and
SuperGalum
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Thickness(mm) |
Area per ton(m²/ton) |
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SuperGalum |
GI |
| 0.40 |
AZ 150 |
391 |
Z 18 |
385 |
| 0.45 |
339 |
328 |
| 0.50 |
299 |
290 |
| 0.60 |
243 |
Z 22 |
236 |
| 0.80 |
204 |
199 |
| 1.00 |
124 |
123 |
| 1.20 |
104 |
Z 27 |
102 |
| 1.60 |
78 |
77 |
| 2.00 |
63 |
62 | ※ theoretical calculation depends on size
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Paintability
Paint is highly adhesive to the coated layer of
SuperGalum steel sheet, compared to galvanized steel plates. SuperGalum used for
general purposes does not require pretreatment before painting. |
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Weldability
The weldability of SuperGalum is similar to that of
galvanized steel sheet. Special attention required before welding includes the
welding current, time, and electrode pressure.
Spot Welding Conditions
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Thickness (mm) |
Electric Current (A) |
Pressure (kg) |
Welding Time, cycle (1/60sec) |
Electrode diameter (mm)
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| 0.56 |
11000 |
160 |
10 |
4.75 |
| 0.71 |
11300 |
180 |
12 |
4.75 |
| 0.91 |
12500 |
230 |
14 |
6.35 |
| 1.02 |
12800 |
230 |
14 |
6.35 |
| 1.35 |
13000 |
250 |
14 |
6.35 |
| 1.65 |
13400 |
300 |
18 |
6.35 |
Spot Welding Conditions
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Thickness (mm) |
Electrode shape (mm) |
Thickness of
Electrode (mm) |
Pressure (kg) |
Electric Current (A)
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Weld time (cycle=1/60sec.) |
Weld Speed (mm/min)
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Heating |
Cooling |
| 0.43 |
12.70 Radius |
9.53 |
320 |
14500 |
2 |
2 |
1500 |
| 0.56 |
17.70 Radius |
9.53 |
390 |
16000 |
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2 |
1500 |
| 0.86 |
6.35 Radius |
12.7 |
450 |
21500 |
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2 |
1500 |
| 1.24 |
6.35 Flat |
12.7 |
500 |
22000 |
4 |
2 |
1500 |
| 1.24 |
6.35 Flat |
12.7 |
500 |
23000 |
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1 |
2300 |
| 2.11 |
7.94 Flat |
15.88 |
730 |
27000 |
10 |
6 |
760 |
Caution: Recommend intermittent electric current. |
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Workability
The workability of SuperGalum is similar to that of
galvanized steel sheet. Its ability to suppress fine cracks on the coating layer
enhances the durability of the treatment area.
Superior roll forming property
Treatment area; excellent durability
Test results from exposure in coastal area
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Organic Coating Process |
제목 없음
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Our organic film treatment on the coated layer of the SuperGalum
steel sheet, which is applied to the in-line coater, includes acryl
resin organic film containing 1~2㎛ chromate. In comparison with
the temporary corrosion resistant property of the conventional chromate
applied in post-treatment, SuperGalum offers the following functions.
* High corrosion resistance
* Lubrication properties (No need
for lubrication oil)
* Paintability
* Anti-fingerprint properties
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Structure of organic films
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Production process of organic film layers
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Application |
제목 없음
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Construction
- Roofing material, side-wall material, partition, soundproof wall, duct,
shutter, garage door, fencing, corrugated steel pipe, lightweight steel
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Automotive components - Muffler, Exhaust Silence Boxes, Exhaust Pipe (Tail Pipe), Oil filter tube, Bus
floor, Truck bottom, Air cleaner Cover, Hose Clamp, Brake Pad Cover |
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Electrical (home) appliances
| - Vending machine, Gas boiler, Gas oven, Toaster, Air
conditioner/heater, Washer, Light shade |
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Agricultural
- Greenhouse pipe, Silo, Tobacco leaf dryer, Grain dryer, Agriculture equipment,
machine parts, Greenhouse panel
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산업기기분야 - Industrial Equipment, Heat insulator cover, Water heater, Heat exchanger,
Dryer, Waste incinerator, Container |
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Cautions |
제목 없음
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Handling and Storage
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Please inspect the product immediately upon receipt. |
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Use clean, dry gloves in order to prevent surface
contamination. |
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Equipment used in the handling of the goods must be clean. The contact
surface must be smooth without any bumps in order to prevent damage to the
coated layer. Special care must be made to prevent coil from rolling when put on
the floor. |
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The product must remain dry during transportation. Storage must take place
inside a structure insulated from surrounding environment.
Proper ventilation
must be provided in case the product is stored high-temperature, high-humidity
conditions. |
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Sheet must be stored on a slant for the effective discharge of humidity that
may occur. |
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To prevent discoloration if the coil becomes wet, they must either be
produced immediately or be unwound to dry. |
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Mechanical Jointing and Welding
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Material with weather resistance equal to that of SuperGalum must be selected
for mechanical welding and metallurgic welding. In comparison with the welder
tool tip of other coated steel sheet whose life span tends to decrease, welding
SuperGalum can minimize such problems by modifying the tip shape of the
coolant. |
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SuperGalum must avoid contact with lead, bronze or graphite. Contact with
such materials can result in red rust. Water falling from bronze sheet to
SuperGalum sheet will accelerate local corrosion. |
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Similar to aluminum coated steel sheet, soldering SuperGalum is difficult due
to the aluminum oxide film on the surface. Use the aluminum steel sheet
soldering and torch. |
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Avoid using neutral silicon rubber sealant containing amino acid and acetic
acid, which can accelerate corrosion at the beginning of the drying process. |
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The surface must be clean, dry and free of scale. Grease and oil can be
removed with a neutral solvent or paint thinner. Use a wire brush to remove
corrosion and by-products. |
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The use of Alkid or 100% acryl paint will yield satisfactory results.
However, avoid mixing paint produced by different companies. | |
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Use for livestock houses
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SuperGalum that has not undergone post-treatment should not be used in
building barns. The discharge and by-products from animals expose SuperGalum to
a highly corrosive environment, accelerating corrosion even when proper sealing
and ventilation facilities are installed. |
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Alkali corrosion
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Due to the properties similar to those of aluminum coated steel sheet,
discoloration is likely to occur if SuperGalum comes into contact with alkali
material. Precautions must be taken. |
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Forming
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Although the aluminum/zinc coated layer possesses the same properties as
lubrication oil, additional lubrication oil is desirable for satisfactory
formability (SuperGalum with organic film excepted). |
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During the forming process, SuperGalum tends to experience the pick-up
phenomenon more often than galvanized steel sheet. An appropriate amount of
lubrication oil can prevent these occurrences. Avoid using solvent lubrication
oil if SuperGalum is not completely dry before storage. Completely remove all
steel powder, Fe fines, scraps and chips to prevent red rust from
developing. |
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