Aluminum Zinc Color Coated Steel Sheet from China

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Loading Port:
Shanghai
Payment Terms:
TT or LC
Min Order Qty:
5 m²
Supply Capability:
9000 m²/month

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Product Description:

No.

Parameter

Description

1.

Name

Aluminum-zinc-silicon coated sheet

2.

Substrate

Cold rolled steel coils

3.

Zinc-coating

40g - 200g/m2

4.

Painting thickness

Top side:17-25um Back side:5-8um

5.

Steel color

RAL color

6.

Steel thickness

0.12mm - 1.00mm

7.

Material

SGCC/SGCH/DX51D+Z

8.

Coil width

900mm-1250mm

9.

Coil weight

3-6 tons

10.

Coil ID

508mm-610mm

11.

Payment

T/T or L/C

12.

Package

seaworthy standard export package

13.

Shipment

shipped by 20 feet container, loading about 25 tons

 

Coating Characteristic table
ItemTest ItemStandardNational standardDF Test Result
1Color DifferenceECCA T3Δ E≤ 2.0Δ E≤ 1.5
2Gloss DifferenceECCA T2≤ 10≤ 5
3Coating ThicknessECCA T1Two layers Min 23um≥ 24um
Three layers Min 30um≥ 33um
4Pencil HardnessASTM D3363≥ HBHB
5T-bendASTM D4145≤ 2T≤ 2T
6AdhesionASTM D3359Grade 0Grade 0
7ImpactASTM D2794≥ 50 kg/cm≥ 50 kg/cm
8Boiling water ResistanceGB/T177482h No Change4h No Change
9Solvent ResistanceASTM D2248200 times paints remaining500 times no break
10Acidity ResistanceASTM D13085%HCL 24hrs no changeNo change
11Alkali ResistanceASTM D13085%NaOH 24hrs no change color Δ E≤ 2.0No change
12Nitric acid ResistanceAAMA620Δ E≤ 5.0Δ E≤ 5.0
13Oil ResistanceASTM D130820# oil 24hrs no changeNo change
14Salt Spray ResistanceASTM B1174000hrs≤ Grade 1No change
15Abrasion resistanceASTM D968≥ 5L/um≥ 5L/um
16Dirt ResistanceGB/T9780≤ 5%< 5%
17Color retainingGB/T162594000 hrsΔ E≤ 4.04000 hrsΔ E≤ 3.0
18Gloss weaken LevelGB/T162594000 hrs ≤ Grade 24000 hrs ≤ Grade 2

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Q:how to avoid oxidation of aluminum sheet after wire drawing?
leave it alone after wire drawing!aluminum sheet will formulate a layer of dense oxide film. So you don't need to worry about it! Don't often polish the aluminum wire, or they will be more and more slimsy, the oxide film is used for avoiding reoxidation.
Q:why does the bubble apear a few minutes later after putting aluminum sheet into diluted hydrochloric acid?
Aluminum element is extremely activated and will react with oxygen, generating aluminum oxide, once being exposed in air, so there is a layer of aluminum oxide on the surface of daily aluminum products including aluminum sheet. When aluminum sheet is put into diluted hydrochloric acid, aluminum oxide on the surface will firstly react with hydrochloric acid, generating aluminium chloride and water, the process won’t generate bubble, but after finishing the reaction of aluminum oxide on the surface, when the exposed aluminum element reacts with hydrochloric acid, generating aluminium chloride and oxygen, the bubble appears.
Q:How to polish aluminum sheet to be bright?
as for polishing, fine grit sandpaper can't polish it into a mirror,but laser cutting can do it.
Q:why does 10% sulfuric acid not react with aluminum sheet?
10% sulfuric acid has a high concentration and will be passivated and formulate a layer of oxide film after reacting with aluminum,and the reaction will stop after seperating sulfuric acid and aluminum. there is a layer of Al2O3 oxide film on the surface of aluminum, so it's hard for sulfuric acid to break the oxide film and react with aluminum.
Q:which kind of aluminum sheet could be bended after being etched?
general etching materials include stainless steel and copper.
Q:will it influence powder injection effect after wiping the oil contamination on the surface of aluminum sheet?
no, but I'm not certain.
Q:Could induction heating fuenace be packaged with aluminum foil as insulation material?
It’s useless. Aluminum foil will generate eddy and emit heat after medium induction, which will reduce the thermal efficiency of medium frequency. Now I provide a method for reference only. Induction coil will be water cooling and is packaged by thermal cement and other materials. Use asbestos sheet and other materials to transform the both ends of induction heating coil as baffle which is mobile and convenient for load and unload. When steel tube is heated in the induction coil, you can put down the baffle to prevent large loss of heat, shorten heat time and improve heat efficiency. When the seamless steel tube is heated into setting temperature, you can open the baffle to conduct expanding process, and you don’t need to think about the thermorytic problem of steel tube in the expanding process. It’s important to shorten the time of expanding process. Baffle is used for heat retaining of medium frequency heating and extrusion forming in our factory. The method above for reference only.
Q:why is copper sheet but not aluminum sheet that becomes the negative pole after putting copper sheet and aluminum sheet connected with wire into concentrated nitric acid?
According to metal reactivity series order table, aluminum has a better metallicity, but it will be passivated soon after contacting concentrated sulfuric acid, and won’t react again. But copper and concentrated sulfuric acid can react continually. So aluminum sheet becomes the positive pole after passivation.
Q:Which kind of glue is best for bonding wood and aluminum sheet together?
cm2, leather. 4, it’s durable and can endure 106 degree high temperature. Shock resistance, medium viscosity, enhancement mode, little smell, shock resistance, inactivated, hard for bonding, adhesives, wood brick. 480, little white sediment, bonding, acidity, 410。 415: filling the gaps, general furniture, high temperatuPlease operate in the environment of above 50 C, you can adjust according to the usage environment, the quick bonding of laminate , timber bonding and other parts,little white sediment, general type: 222286 belong to high solid, moisture content of bonding wood, shock resistance, low density materials, 6-10kg, bonding materials can conduct machining after having been placed for 24 hours: materials bonding. 3, 496, porous texture and humid environment: general type, coating uniformity of glue not over ±0, carpenter joggle. 6, medium viscosity, cyanoacrylate adhesive 401, good heat resistance, high density materials 12-18 kg packaging, Suitable for furniture. 414 (1) Formica, carpenter’s glue,
Q:why intact aluminum sheet stop quicker than pectinate one in the magnetic field?
while swinging in the magnetic field, intact aluminum sheets will formulate inner eddy current,that is the annular induced current.eddy current will transform the mechanical energy into heat energy, which makes the aluminum sheet stop quickly.but pectinate aluminum sheet can't formulate intact eddy current, so intact aluminum sheet stop quicker than pectinate one.

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