55%Al DC54D+AZ Weathering Resistance Low Carbon GL Steel Cool Coil

DC54D+AZ steel is hot dipped galvanized steel under the standard Q/BQB 420-2003. It is used for stamping. It is widely used for the production of automobile, construction, household appliances and other industries both inside and outside covering parts and components.

 

55% Al-Zn alloy coated steel sheet has excellent weather-proof property and appearance. In addition to the plate for top grade building outside, the volume of 55% Al-Zn alloy coated sheet with Cr-free passivation and anti-fingerprinting treatment used in home appliaance is getting bigger and bigger. GNEE STEEL can provide steel grades DC51D+AZ, DC52D+AZ, DC53D+AZ, DC54D+AZ, S250GD+AZ, S300GD+AZ, S350GD+AZ, S550GD+AZ.

 

• Surface structural

 

 

DC54D+AZ 55% AI-Zn alloy galvanized steel sheet for appliances is mainly used for cold forming. With 55% Al-Zn alloy galvanized coating, the recommended nominal coating weight is 30/30,40/40,50/50,60/60,75/75,90/90g/m².

DC54D+AZ 55% AI-Zn alloy galvanized steel sheet for appliances nominal thickness: 0.22~2.0; width: 700~1300; length of steel plate: 1000~6000; Inside diameter of steel strip: 508.

 

Cr-free passivation and anti-fingerprinting 55% Al-Zn alloy coated sheet are applicable to rear back panel for refrigerator and air conditioner or ther internal structural parts. This kind of product has even beautiful spangle, with excellent corrosion resistance property and good adhesion with foaming adhesive. Specially used in explosion-proof band for CRT, the Cr-free passivation 55% Al-Zn alloy coated sheet has excellent corrosion resistance property, weldability, heat resistance property. It is suitable for current process of CRT.

 

Grade	Chemical composition %
	C max	Si max	Mn max	P max	S max	Alt min	Ti max	Nb max
DC54D+ AZ	0.01	0.10	0.30	0.025	0.020	0.015	0.1	0.1

 

STEEL GRADE	Tensile Strength (Mpa)	Yield Strength (Mpa)	n90	r90	Elongation% min (Lo=80mm b=20mm)		The coating adhesion (The heart bending diameter )
			min	min	<0.7mm	>0.7mm	<140/140	>140/140-175/175	>175/175
DC54D+ AZ	270-350	140-220	0.18	1.6	34	36	0a	1a	2a

 

Home appliances: Refrigerator panels, air conditioner shells, washing machine components

Automotive: Interior parts, seat accessories, structural components

Construction: Roofing, wall cladding, photovoltaic brackets, electric cabinets

General industry: Ventilation ducts, furniture, decorative materials

 

 

1. What is the standard thickness (gauge) for Galvalume roofing?

The most common gauges for residential and commercial roofing are 24 gauge and 26 gauge, though it is available in thinner or thicker options depending on the structural needs.

 

2. What does the "55% Al-Zn" mean?

It refers to the weight ratio of the coating. The 55% aluminum provides a durable barrier against the elements, while the zinc ensures that if the steel is scratched, the coating "sacrifices" itself to protect the exposed metal.

 

3. Can Galvalume handle high temperatures?

Yes. Galvalume can withstand temperatures up to 315°C (600°F) without discoloration and even higher temperatures before the coating is compromised, making it ideal for flue pipes and appliances.

 

4. How do I maintain a Galvalume roof?

Maintenance is minimal. It is recommended to rinse the surface with clean water once a year to remove salt, dust, or organic debris that could trap moisture against the metal.

 

5. Is Galvalume more expensive than Galvanized?

Initially, Galvalume may have a slightly higher price point per ton than Galvanized steel, but its lower life-cycle cost (due to longevity) makes it more economical over time.

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