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Galvalume Steel Corrugated Roof Sheet

A Galvalume steel corrugated roof sheet is a high-performance building material manufactured from Galvalume-coated steel coil. The core of this product is a hot-dip coating composed of 55% aluminum, 43.4% zinc, and 1.6% silicon, which metallurgically bonds to the steel substrate. This unique alloy coating synergistically combines the barrier protection of aluminum with the sacrificial anode protection of zinc, resulting in a roofing material with exceptional durability, longevity, and aesthetics, suitable for a wide range of architectural and industrial applications, including extreme environments.

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Galvalume Steel Corrugated Roof Sheet

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Galvalume Steel Sheet

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Galvalume Steel Corrugated Roof Sheet Description

Key Advantages & Features
1. Superior Corrosion & Rust Resistance
The aluminum content forms a stable, self-healing oxide layer that acts as a robust barrier against moisture and atmospheric agents. Simultaneously, the zinc component provides galvanic (sacrificial) protection to cut edges and scratches. This dual-protection mechanism grants Galvalume sheets a corrosion resistance typically 2 to 6 times greater than that of standard galvanized steel (GI) under identical conditions.

2. Excellent Heat Reflectivity & Energy Efficiency
With a solar reflectance approximately twice that of traditional galvanized roofing, Galvalume sheets significantly reduce heat absorption. This helps lower indoor temperatures during summer, decreasing cooling energy consumption and improving thermal comfort—making it an ideal choice for hot climates and sustainable building designs.

3. High-Temperature Resistance
The alloy coating maintains stability and protective properties at sustained temperatures up to 315°C (600°F), allowing for reliable long-term performance in applications exposed to high heat, such as in certain industrial settings or under intense solar radiation.

4. Aesthetic Appeal & Paint Adhesion
The surface features a distinctive, uniform silvery-white spangle pattern with a smooth finish, offering an attractive appearance suitable for exposed applications. The coating also provides an excellent substrate for painting, with superior paint adhesion for customized color and aesthetic requirements.

5. Outstanding Formability & Fabrication
The base steel and coating are designed for excellent formability, allowing for easy and precise cutting, bending, roll-forming, and profiling without coating cracking or peeling. This ensures structural integrity and coating durability in complex roof designs.

Scope of Application

Commercial buildings: hospitals, schools, shops, government buildings, etc.
Residential projects: private houses, apartments, temporary houses, garages, etc.
Industrial application: warehouse, factory, etc
Agricultural use: barn, storage room, greenhouse, etc

Product Parameters

Product Name	Galvalume Steel Sheet
Thickness	0.12mm-6.00mm
Width	20mm-1500mm
Length	1m-12m, Support Customization
Standard	AISI, ASTM, DIN, JIS, GB, JIS, SUS, EN, etc.
Thickness of Aluminum Zinc Coating	15-275g/m²
Content of Al-Zn Coating	Al: 55%, Zn: 43.5%, Si: 1.5%

Chemical Composition

Al	Zn	Si	Fe	Cu	Cd	Pb	Sn	Ni	Close Cr
55-58	41-43	1.5-2	0.25	0.03	0.05	0.01	0.05	0.05	0.05

Mechanical Properties

Grade	Yield Strength MPa≥	Tensile Strength MPa≥	Elongation A%≥
DX51D Z/ZM/AZ/AM	240-380	270-500	22
DX52D Z/ZM/AZ/AM	140-300	270-420	26
DX53D Z/ZM/AZ/AM	140-260	270-380	30
DX54D Z/ZM/AZ/AM	120-220	260-350	36
S220GD Z/ZM/AM	220	300	20
S250GD Z/ZM/AZ/AM	250	330	19
S280GD Z/ZM/AM	280	360	18
S300GD A/AM	300	380	18
S320GD Z/ZM/AM	320	390	17
S350GD Z/ZM/AZ/AM	350	420	16
S450GD A/AM	450	480	15
S550GD Z/ZM/AZ/AM	550	550	-

Galvanized Surface Selection

Type of Coating	Recommended Coating Weight
Aluminum-zinc Alloy	30/40/50/60/75/90/100/150
A: Coating quality50g/㎡,approximately equal to the coating thickness13.3pm

Project	Classification	Symbol
Type of Coating	Aluminum-zinc Alloy	AZ
Surface Finish	Conventional Sequins	R
	Minimize Sequins	M
	Skin Through	S
Surface Treatment	Chromate Passivation	c
	Non-chromate Passivation	C5
	Chromate Passivationoiling	CO
	Chromium-free Passivationoiling	CO5
	Anti-fingerprint	N
	Chromate-free/Anti-fingerprint	N5
	No chromate high weather resistance fingerprint	NW
	Oil filling	0
	No treatment	U

Material Comparison

Chinese Standard	European Standards	American Standard	Japanese Standard
DC51D+AZ	DX51D+AZ	CS Type B, Type C	SGLCC
DC52D+AZ	DX52D+AZ	DS	SGLCD
S250GD+AZ	S250GD+AZ	255	-
S300GD+AZ	-	-	-
S350GD+AZ	S350GD+AZ	345	Class1 SGLC490
S550GD+AZ	S550GD+AZ	550	SGLC570

Packing and delivery

We have been deeply involved in the fields of infrastructure construction and underground engineering for a long time. Our core products are grouting pipe series and advanced small conduits. We are an indispensable supplier of key materials in tunnels, subways, mines, water conservancy and various construction projects.

Packaging and shipping

FAQ

Q: How long is your delivery time?

A: Generally, if it is in stock, it will take 5-10 days, if it is not in stock, it will take 30 days.

Q: Can we send samples?

A: We can provide samples for the products you are interested in.

Q: How do we ensure quality?

A: We conduct pre-production sample testing, accept third-party or customer inspection, and conduct final inspection before shipment.

Q: How do you ensure long-term relationships?

A: We maintain high quality and competitive prices to benefit our customers. Every client is treated as a friend, we do business with sincerity and strive to build lasting relationships, regardless of origin.

Service Phone

+86 18864878811

metalfactory@jiechuangsteel.com

Address

Liaocheng, Shandong, China

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Galvalume Steel Sheet