galvalume steel coil and steel sheet introduction, chemical composition and technical property, specification as below: Galvalumed steel sheet is an alloy coated steel sheet with the best combination of aluminum and zinc composition and structure. It has the corrosion resistance, heat resistance of aluminum and the electrochemical properties of zinc. The surface is uniquely smooth, flat and gorgeous spangles. , The base color is silver gray; the coating composition is composed of 55% aluminum, 43.4%
zinc and 1.6% silicon in weight ratio. Basic characteristics
Weight ratio: 55%AL, 43.4%Zn, 1.6%Si
Volume ratio: 80%Al, 18.0%Zn, 2.0%Si
Density: 3.75g/cm3
Melting point: 590℃
Hardness: 120-159 (MHV)
Surface: silver gray, uniform diamond spangles
Product advantages:
1. Good corrosion resistance
Under various environmental conditions, the galvanized steel sheet exhibits superior corrosion resistance than the hot-dip
galvanized steel sheet of the same thickness, and its service life is 2-6 times that of the ordinary galvanized steel sheet. Since the microcracks of the aluminum-zinc-plated deformed part are smaller than that of the hot-dip galvanizing, the corrosion resistance in the forming area is much higher than that of the hot-dip galvanizing.
2 Good surface properties
The surface characteristics are good, the spangles are small and uniform, the color is bright silver gray, and the surface
hardness is high (not easy to scratch)
3 Good processability
The galvanized steel sheet with 55% zinc alloy coating has excellent adhesion and flexibility. It has excellent shape and
workability similar to galvanized steel sheet. Especially, there are few cracks in the processing part of the steel plate
4. Good heat resistance
The heat resistance of galvanized steel sheet is much better than that of galvanized steel sheet, and has the characteristics similar to that of aluminized steel sheet:
Galvanized steel sheet: It is recommended not to exceed 230℃ under high temperature, it will change color if it exceeds 250℃.
Galvalume steel:
The color does not change even when used for a long time in an environment around 315°C, and it can also be used in an environment around 370°C for a short time.
5. Good heat reflection
The heat reflectivity of galvanized steel sheet is about twice higher than that of galvanized steel sheet. Therefore, when
uncoated products are used on roof and partition wall panels, a better energy saving effect can be obtained.
6 Good coating performance
When galvanized sheet is used as a writing board or other purposes for painting, it only needs to remove oil without pretreatment
or erosion treatment, because the coating and coating have a good polarity combination, while the hot-dip galvanized layer is Noway.
7. Relatively light
Due to the light weight of the galvanized steel sheet, the unfolded area per ton of steel is larger than the galvanized steel
sheet with the same thickness of the galvanized layer. Take 0.48mm and 40μm (two sides) of the coating as an example, its weight per square and ton of steel can be unfolded The area is as follows:
Substrate: AZ150 Z275; AZ150 Z275
Weight per square meter: 3.94kgs 4.06kgs
Expanded area 254m2 246m2
Post-processing:chromated, anti-finger printed, oiled,
Supply features:
Substrate: According to ASTM792, GB/T14978-2008 standards or customer requirements, specific steel grades include SGLCC, G345, G300, G550, etc.
Coating: Coating ≥AZ80 or customized according to customer needs
Coating structure: smoothing small spangles (or laser texturing)
Width: 600-1250mm
Thickness: 0.12-1.2mm
Application field
Mechanical and electrical: computer case, communication equipment, electric box, electric cabinet, etc.;
Electrical appliances: oven, washing machine, refrigerator, dehumidifier, video recorder, water heater, etc.
Construction: floor decks, ceilings, balconies, warehouses, roofs, compartments, walls, etc.
Transportation industry: interior panels of car bodies, rear seats of buses and trucks, conveyor systems, fuel tanks, etc.;
Agricultural equipment: large barns, storage rooms, greenhouses, agricultural dryers, sinks, feeders, etc.;
Furniture and others: vending machines, entertainment machines, chimney pipes, office equipment, garages, etc.
Main Products: , , ,
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