What are the advantages of galvalume coil?

What are the advantages of galvalume coil?

 

 

The galvalume steel coil, also called aluzinc steel coil, is made by cold-rolled steel sheet as a substrate and solidified by 55% aluminum, 43.5% zinc and 1.5% silicon at 600 °C. Similar to galvanized steel, galvalume steel is produced by a hot-dip process. It combines the physical protection and high durability of aluminum and the electro chemical protection of zinc.

 

Product Name	Galvalume Steel Coils
Type:	Steel Coil
Thickness	0.2mm ~ 4.0mm
Width	600mm~2000 mm (slittable)
Surface	Chromate, oiled, AFP, etc.
Aluzinc Coating	AZ 30~ 275g/m2
Technique	Cold rolled or hot rolled
Application	Construction, automobiles, hosehode appliances, agriculture, etc.
Grade	DX51D+AZ, SGLCC, SGLCD
Standard	AISI, ASTM, BS, DIN, GB, JIS, etc
Certification	MTC, SGS, BV, ISO 9001
Payment term	T/T, L/C, at sight
Packaging	Standard seaworthy package
Delivery Time	15 ~25 working days after payment

 

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1.Roofing and wall cladding：Used for residential, commercial, and industrial buildings, providing excellent corrosion resistance and long service life.
2.Steel Structure Buildings: Widely applied in steel structure buildings and large-span construction projects.
3.Sandwich Panels: Used as base material for insulated sandwich panels in building construction.
4.Industrial, Warehouse, and Agricultural Buildings: Suitable for factories, warehouses, storage facilities, and agricultural buildings.

In addition to the applications above, Galvalume steel with appropriate surface treatment is also suitable for household appliances, especially for internal structural components.

The surface of galvanized steel plate has a unique smooth, flat and gorgeous star flower, and the base color is silver-white. The special coating structure gives it excellent corrosion resistance. The normal service life of galvanized sheet can reach 25 years. It has good heat resistance and can be used in high temperature environments of 315°C. The coating has good adhesion to the paint film and has good processing performance, and can be stamped, sheared, welded, etc.; Surface conductivity is very good.

 

 

Galvalume steel coils offer superior corrosion resistance and longer service life compared to traditional galvanized steel coils.

 

Item	Galvalume Steel Coils	Galvanized Steel Coil
Coating Composition	55% Aluminum, Zinc & Silicon	100% Zinc
Corrosion Resistance	Excellent, especially in harsh environments	Good in general environments
Heat Resistance	Superior	Moderate
Surface Appearance	Smooth and uniform, silver finish	Visible spangle surface
Service Life	2–4 times longer than galvanized steel	Standard
Maintenance Cost	Lower in long-term use	Higher over long-term use
Cost Level	Slightly higher	Lower
Typical Applications	Roofing sheets, wall panels, industrial buildings	Fencing, general construction

 

 

1. Corrosion resistance: Galvanized sheet has strong corrosion resistance, with a normal service life of up to 25 years, which is 3-6 times longer than galvanized sheet and is comparable to stainless steel. The corrosion resistance of galvanized sheets comes from the barrier layer protection function of aluminum and the dedicated protection function of zinc. When zinc is used to protect the trimmed edges, scratches and abraded parts of the coating, the aluminum forms an insoluble oxide layer that performs barrier protection. Al-Zn alloy-coated steel coils have been subjected to outdoor exposure tests for more than 20 years in various atmospheric environments, proving that the trimming protection function of 55% Al-Zn-coated steel sheets is better than that of galvanized steel sheets and 5% Al-Zn-coated steel sheets. Better.

 

 

2. Heat resistance: Al-zinc plate has a high degree of heat reflectivity and is suitable as a roof material. Al-zinc alloy steel plate itself also has excellent heat resistance and can be used in high temperature environments up to 315 degrees.

 

3. Recoatability: (paint film adhesion) The galvanized sheet can maintain good adhesion with the paint film and can be directly sprayed or powdered without special pre-treatment.

 

4. Corrosion resistance after coating: After the galvanized plate itself is partially painted and baked, the corrosion resistance of the unsprayed parts will be slightly reduced. The function is much better than electroplated color zinc, electrogalvanized sheet and hot-dip galvanized sheet.

 

5. Processability: (shearing, stamping, spot welding, seam welding) Al-zinc coated steel sheet has excellent processing properties and can be punched, sheared, welded, etc. The coating has good adhesion and impact resistance.

 

6. Electrical conductivity: The surface of the galvanized plate is specially waxed to meet the needs of electromagnetic shielding.