DC53D+Az50 70 100 Galvanized Steel Coil

 

DC53D+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.

 

DC53D+AZ is a hot-dip 55% aluminum-zinc alloy coated steel coil with deep drawing cold rolled substrate. It features excellent ductility, superior formability and outstanding corrosion resistance, widely used for complex stamping and deep drawing parts.

 

D: Flat steel for cold forming

C: Cold-rolled base material

53: Deep drawing grade, better stretching performance than DC52D

D: Hot-dip coated

+AZ: 55% Al-Zn alloy coating (55% Aluminum, 43.4% Zinc, 1.6% Silicon)

 

• Main Advantages

Excellent deep drawability, suitable for complicated bending and stamping.

High corrosion resistance, 2–6 times longer service life than regular galvanized steel.

Good high-temperature resistance up to 315℃.

Smooth silver spangle surface, perfect for direct use or painting.

 

 

Grade	Chemical composition %
	C max	Si max	Mn max	P max	S max	Alt min	Ti max	Nb max
DC53D+AZ	0.08	-	0.40	0.030	0.030	-	-	-

 

 

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
DC53D+AZ	270-380	140-260	-	-	28	30	0a	1a	2a

 

 

Grade	Tensile test
	Yield strength MPa	Tensile strength MPa	Elongation
DC51D+AZ	-	270-500	22
DC52D+AZ	140-300	270-420	26
DC53D+AZ	140-260	270-380	30
DC54D+AZ	120-220	260-350	36

 

Aluzinc Coating Specification Chart
Coating Code	Total Coating Weight	Total Coating Thickness	Approx. Single Side Thickness(μm)	Applicable Standards
	(g/m², both sides)	(μm, theoretical)
AZ50	50	13.16	6.58	GB/T 14978, EN 10346, ASTM A792
AZ70	70	18.42	9.21	GB/T 14978, EN 10346, ASTM A792
AZ100	100	26.32	13.16	GB/T 14978, EN 10346, ASTM A792
AZ150	150	39.47	19.74	GB/T 14978, EN 10346, ASTM A792
AZ180	180	47.37	23.68	GB/T 14978, EN 10346, ASTM A792
AZ200	200	52.63	26.32	GB/T 14978, EN 10346, ASTM

 

 

 

1. Can I paint Galvalume steel?

Yes. While Galvalume can be used in its "bare" metallic state, it is often pre-painted (color-coated) at the factory. If painting on-site, specific primers for Al-Zn coatings must be used.

 

2. What are the common applications of Galvalume?

It is primarily used for metal roofing, wall panels, grain silos, automotive parts, and household appliances (like ovens and refrigerators) due to its heat resistance.

 

3. Does Galvalume reflect heat?

Yes, Galvalume has high solar reflectivity. It reflects a significant amount of solar radiation, which helps keep buildings cooler and reduces energy costs in the summer.

 

4. Can Galvalume be used with pressure-treated wood?

No. The chemicals in modern pressure-treated lumber (like copper) react electrolytically with the Galvalume coating, leading to rapid corrosion. Use a barrier or choose different materials.

 

5. Is Galvalume steel environmentally friendly?

Yes, it is 100% recyclable. Additionally, its long lifespan and energy-saving reflective properties make it a sustainable choice for "green" building.

 

6. 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.

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