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AL-COT(Hot Dip Aluminum Coated Steel Sheet) |
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Hot-dip aluminum coated steel sheet combines the mechanical properties of cold-rolled steel sheet with aluminum’s high resistance retention, heat reflection, and superior rust resistance. |
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USAGE |
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Automotive components
muffler, exhaust pipes, fuel tanks
Home Electrical Appliances
Electric stove, gas range, bread machine, electric stove, toaster, frying pan, dryer
Heating equipment
heat exchanger, stovepipe, pre-heater, dryer, duct
Construction
Walls and roofs of chemical factories, fireproof wall
Other
Steam cover, other chemical equipment
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DESCRIPTION |
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Superior Heat Resistance
Lengthy exposure to temperatures up to 450 degrees Celsius causes very little change in ALCOT and does not affect its attractive surface brightness, compared with galvanized steel sheet and cold-rolled steel sheet.
- Heat Resistance Test Results
- Test conditions: Naked eye comparison the sheet after two rounds of test procedures (Heating (1.5 Hr), maintaining (5 Hr), cooling (17 Hr))
Heat Resistance Test Results
category |
300℃ |
350℃ |
400℃ |
450℃ |
500℃ |
550℃ |
600℃ |
ALCOT |
○ |
○ |
○ |
○ |
△ |
△ |
× |
GALVALUME |
○ |
○ |
△ |
△~× |
× |
× |
× |
GI |
△ |
△~× |
× |
× |
× |
× |
× |
○ : No change △ : Luster down × : Tums blackish
- Heat Resistant Equipment using ALCOT steel
- When heated, an oxide film is formed on the surface as the alloy layer is activated, protecting its surface.
Superior Heat Reflectivity
The highly elegant surface of ALCOT reflects about 80% of the heat at a temperature of 450 degrees Celsius. Its reflection rate goes up to 95% where infrared rays are present. This makes ALCOT the ideal choice for producing the heat reflector plates in toasters, ovens, gas ranges and oil stoves.
Heat Reflectivity
Type |
ALCOT |
GI |
100℃×24hr |
80% |
80% |
450℃×24hr |
80% |
15% |
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설명 |
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Coating Layers
Types of ALCOT steel sheet are categorized by the components of the molten pot. Applications are as follows
AL-COT 강판의 종류
Classification |
Type Ⅰ Alumininized |
Type Ⅱ Alumininized |
components of the molten pot. |
Al-Si(8~10%) |
Al |
Components of the alloy layer |
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Application |
Heat resistance treatment |
Weather resistance (construction material) |
Cross section of ALCOT steel sheet of the coated layers
Production Availability
Production Availability
Production Availability by Coating Weight
Post-treatment
Post-treatment
Chromated |
Oiled |
Chromated & Oiled |
No Treatment |
○ |
○ |
○ |
○ |
- Chromating
- - Average : 11.5 mg/m² (one side)
- - Range : 6.8~18.9mg/m² (one side)
- Oiling
- - Slightly : 500~800mg/m² (both side)
- - Normal : 1,000~1,400mg/m² (both side)
- - Heavy : 1,400~2,000mg/m² (both side)
Grade and Symbol
Grade and Symbol
Class |
JIS G3314 |
ASTM A 463 |
ASTM A 463-96a |
EN 10154 |
Commercial Quality (Type1) |
CQ |
SA1C |
CQ |
CS TYPE A |
DX51D |
CS TYPE B |
DX52D |
CS TYPE C |
Drawing Quality (Type1) |
DQ1 |
SA1A |
ADQ |
- |
DX53D |
DQ2 |
SA1D |
DQ |
FS |
DX54D |
DDS |
DX55D |
DQ3 |
SA1E |
DQSK |
EDDS |
- |
EDDQ |
- |
EDDQ |
EDDS |
- |
Structural Quality (Type1) |
Grade A |
SAC31 |
SQ-A |
Grade230 |
- |
Grade B |
SAC35 |
SQ-B |
Grade255 |
S250GD |
S280GD |
Grade C |
SAC41 |
SQ-C |
Grade275 |
S320GD |
Grade D |
SAC45 |
SQ-D |
Grade340 Class1 |
S350GD |
Grade340 Class2 |
Grade F |
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- |
Grade340 Class3 |
- |
Grade E |
- |
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Grade550 |
- |
Mechanical Properties
Mechanical Properties
Class |
Tensile Strength (㎏/㎟) |
Yield Point (㎏/㎟) |
Elongation(%) |
Thickness (㎜) |
Thickness(㎜) |
T≤0.5 |
0.5< t |
t≤0.5 |
0.5< t≤1.2 |
1.2< t |
Structural Quality (Type1) |
Grade A |
SAC31, SQ-A |
31min |
21min |
21min |
20min |
20min |
20min |
Grade B |
SAC35, SQ-B |
35min |
25min |
25min |
20min |
20min |
20min |
Grade C |
SAC41, SQ-C |
41min |
30min |
30min |
18min |
18min |
18min |
Grade D |
SAC45, SQ-D |
45min |
37min |
37min |
18min |
18min |
18min |
Applied Specifications
- -KS D 3544
- -JIS G 3314
- -ASTM A 525 (FOR ASTM A463)
- -EN 10143
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