G60 Galvanized Steel ASTM A792 Galvalume Steel Coil G550 for Construction and Automobile

• Customization: Available
• After-sales Service: Contact Supplier
• Warranty: Contact Supplier
• Model NO.: Zinc coating 30-275g/m2
• Standard: ASTM, JIS, GB, AISI, DIN, BS
• Certification: ISO
• Surface Treatment: Anti-Fingerprints/Aluminum-Zinc
• Technique: Cold Rolled
• Application: Container Plate
• Edge: Slit edge
• Stock: Stock
• Model Number: Dx51d
• Zinc Coating: 60-275G/M2
• Coil Weight: 3-5 Tons
• Grade: Q195, Q215,Q235,Q345,St37,16mn,SGCC,CGCC
• Brand Name: Zunkai
• Type: Steel Coil, Cold Rolled Steel Sheet
• Length: Customer′s Request
• Thickness: 0.12mm-0.8mm
• MOQ: 25ton
• Coil ID: 508mm/610mm
• Unit Weight: 3-5 Ton
• Shape: Sheet in Coil
• Composition: Al+Zn+Si
• Oiled or Non-Oiled: Slightly Oiled
• Payment Term: L/C T/T (30% Deposit)
• Transport Package: Sea Packing
• Specification: Thickness 0.12-3mm Width 600mm-1500mm
• Trademark: zunkai
• Origin: China
• HS Code: 7210610000
• Production Capacity: 30000 Tons/Month

Product Description

Product Description

Galvalume steel coil is a type of steel coil that has a coating of aluminum-zinc alloy, which is applied to it through a continuous hot-dip process. The coating provides corrosion resistance to the steel. It is ideal for use in outdoor environments and in applications where moisture and humidity are present.

Galvalume steel coils are commonly used in roofing, siding, and other construction applications. They offer a combination of durability, corrosion resistance, and heat resistance that makes them a popular choice in extreme environmental conditions.

The name "Galvalume" is a combination of "galvanized" and "aluminum," reflecting the fact that the coating is made up of both materials. The coating consists of aluminum (55%), silicone (1.6%), and zinc (43.4%).

The aluminum coating offers malleability, while the zinc offers galvanic protection for the steel from corrosion. This coating gives the steel a plain and smooth finish while ensuring long-lasting performance and aesthetic appeal for the finished project.

Galvalume Life Expectancy

Galvalume steel coils are resistant to corrosion and rusting, which means they can last for several decades even in harsh environments. According to research, galvalume has proven its outstanding performance in North America, which is prone to extreme conditions such as winter and acid rain.

The outdoor exposure tests on actual building installations prove that Galvalume steel sheets and coils are more resilient and have better corrosion resistance than zinc-coated sheets with the same coating thickness under the same harsh conditions. The steel's service life expectancy can reach an average of up to 35 years without regular maintenance.

Product Parameters

Structural Grades	C	Mn	P	S	Al	Si	Cu	Ni	Cr	Mo	V	Cb	Ti	N
30,33,36,40	0.25	0.9	0.035	0.04			0.2	0.2	0.15	0.06	0.008	0.008	0.025
36T2,45-80	0.25	1.35	0.035	0.04			0.2	0.2	0.15	0.06	0.008	0.008	0.025
45T2	.02- 0.08	.30- 1.0	.03- .07	0.025	.02- .08	0.6	0.2	0.2	0.15	0.06	0.008	0.008	0.025	.01- .03

 

HSLA Grades	C	Mn	P	S	Al	Si	Cu	Ni	Cr	Mo	V	Cb	Ti	N
45C1	0.22	1.35	0.04	0.04			0.2	0.2	0.15	0.06	0.005	0.005	0.005
45C2	0.15	1.35	0.04	0.04			0.2	0.2	0.15	0.06	0.005	0.005	0.005
50C1	0.23	1.35	0.04	0.04			0.2	0.2	0.15	0.06	0.005	0.005	0.005
50C2 & 55C2	0.15	1.35	0.04	0.04			0.2	0.2	0.15	0.06	0.005	0.005	0.005
55C1	0.25	1.35	0.04	0.04			0.2	0.2	0.15	0.06	0.005	0.005	0.005
60C1 & 65C1	0.26	1.5	0.04	0.04			0.2	0.2	0.15	0.06	0.005	0.005	0.005
60C2 & 65C2	0.15	1.5	0.04	0.04			0.2	0.2	0.15	0.06	0.005	0.005	0.005
70C1	0.26	1.65	0.04	0.04			0.2	0.2	0.15	0.16	0.005	0.005	0.005
70C2	0.15	1.65	0.04	0.04			0.2	0.2	0.15	0.16	0.005	0.005	0.005

 

Common Grades	C	Mn	P	S	Al	Si	Cu	Ni	Cr	Mo	V	Cb	Ti	N
CSA	0.1	0.6	0.03	0.035			0.2	0.2	0.15	0.06	0.008	0.008	0.025
CSB	0.02-.15	0.6	0.03	0.035			0.2	0.2	0.15	0.06	0.008	0.008	0.025
CSC	0.08	0.6	0.1	0.035			0.2	0.2	0.15	0.06	0.008	0.008	0.025
BH	0.012	1.5	0.12	0.03			0.2	0.2	0.15	0.06	0.008	0.008	0.025
FSA	0.1	0.5	0.02	0.035			0.2	0.2	0.15	0.06	0.008	0.008	0.025
FSB	0.02-.15	0.5	0.02	0.03			0.2	0.2	0.15	0.06	0.008	0.008	0.025
DDS	0.06	0.5	0.02	0.025	.01		0.2	0.2	0.15	0.06	0.008	0.008	0.025
EDDS	0.02	0.4	0.02	0.02	.01*		0.2	0.2	0.15	0.06	0.1	0.1	0.15

 

55% AL Galvalume steel coils
Base material	CR Full hard steel coils
Standards	GB, ASTM, EN, JIS
Grade	DX51D, DX52D, DX53D, DX54D
	S250GD, S280GS, S300GD, S320GD, S350GD, S550GD
	CS type A, CS type B, FS, DS, EDDS
	Grade 33, Grade37, Grade40, Grade50, Grade80
	SGCC, SGCH, SGC340, SGC400, SGC440, SGC570
Thickness	0.25-1.2mm
Width	720-1250mm
Zinc coating	AZ30-AZ150 g/m2
Spangle	Regular spangle
Surface treatment	Chromated, Oiled, AFP (anti-finger print)
Coil weight	3-25MT
Coil ID	508 or 610mm

Detailed Photos

Manufacture

Galvalume has an alloy coating of 55 percent aluminum, 43.5 percent zinc, and 1.5 percent silicon during the hot-dip process. Silicon acts as a barrier against the development of a breakable intermetallic layer. This layer develops during the hot-dip processing while the zinc coating takes place.

The molten coating and steel sheet interact during the manufacturing, affecting the coating's adhesion during applications. The hard and brittle intermetallic alloy layer must remain thin during processing by adding silicon to the 55 percent aluminum-zinc bath. Silicon helps control the expansion of the alloy layer, making it formable during application.

Silicon does not have a role in preventing corrosion. Some applications of aluminum-zinc-silicon alloy-coated steel were not effective in deep drawing. Instead of using steel coils or sheets with a 55 percent aluminum-zinc-silicon alloy, customers prefer galvanized sheets.

Recent coating technology uses clear resin coatings known as 55 percent Al-Zn Plus, which are effective in some applications of deep drawing.
 

 

Coating Microstructure

The 55% Al-Zn coating microstructure of galvalume consists of two phases. The first phase is known as the aluminum-rich dendritic phase, which develops during the solidification process. At this phase, the dendrite growth is due to the swift movement of the solid or liquid interface in the direction of the undercooled melt.

The second phase is known as the interdendritic zinc-rich region. It develops when the solidifying liquid's zinc concentration is at its highest peak. The microstructure phases are vital to reaching the ideal corrosion resistance.

Apart from the two primary microstructural phases, there are other phases involved in the process, such as the intermetallic layer at the steel-coating interface and the discrete needles of the elemental silicon.

 

 

Product name	Galvalume Steel Sheet in Coil
Standard	ASTM A792/A792M, JIS G 3321, EN 10346
Grade	DX51D+AZ ASTM a792
Alu-Zinc Coating	20-120g/m2
Thickness	0.13-0.7 mm
Width	600-1250 mm
Coil ID	508/610mm
Coil weight	3-8tons
Surface Structure	Mini/Big Spangle
Surface Treatment	Anti-Finger printing ,Chromated, oiled/ non-oiled
Package	standard export package (Detailed picture is as follows)
Hardness	soft (normal), hard, full hard(G300-G550)
HS code	721049
Country of origin	China
Business type	Supplier and manufacturer
Brand name	COSASTEEL

 

Features

 

 

Corrosion Resistance

Galvalume steel coils have superior performance compared to galvanized coatings in rural, industrial, and marine environments. The aluminum-zinc alloy coating has a unique dendritic structure that protects the steel from corrosion.

The zinc-rich areas are the first to corrode under harsh conditions. The corrosion rate decreases in the interdendritic areas of the coating because the corrosive products penetrate the interdendritic interstices. This development results in the flattening of the corrosion rate curve in various environments.

The 55 percent aluminum zinc coating corrosion behavior works differently with a galvanized coating, which has a uniform thinning process. The aluminum-rich dendrites act as a protective coating, while the zinc-rich regions offer galvanic protection to prevent rusting on the sheared and exposed parts of the steel.

The 55% aluminum-zinc steel products are excellent in outdoor environments, such as AZ50, AZ55, and AZ60. AZ50 galvalume steel coil has the same thickness as the G90 galvanized coating. It is perfect for corrugated steel pies with an AZ70 coating.

AZ150 Galvalume Aluzinc Steel Coil        AZ55 Galvalume Steel Coil                AZ50 Galvalume Steel Coil

 

Item	Classification	Symbol
Coating type	Al-Zn alloy	AZ
Surface finish	Regular spangle	R
	Minimized spangle	M
	Skin passed	S
Surface treatment	Chromate passivated	c
	Non-chromate passivated	C5
	Chromate passivated + oiling	CO
	Non-chromate passivated+oiling	CO5
	Anti-fingerprint	N
	Non-chromate anti-fingerprint	N5
	Non-chromate high weather resistance anti-fingerprint	NW
	Oiling	0
	No treatment

 

Galvalume Steel Coil Features

• Thermal Reflection:

People use it as material for heat-insulation for its thermal reflectivity as high as twice the galvanized steel sheet.

• Heat-resistance:

The aluzinc steel coil could bear above 300ºC high temperature with its good performance in heat-resistance, quite similar to the aluminized steel sheet's performance in oxidation-resistance under high temperature. It is often used for chimney pipe, oven, illominator, and fluorescent lamp cover.

• Corrosive-resistance performance:

The essential of galvalume steel coil's corrosive-resistance lies at aluminium's protective property. Once the zinc come under abrasion, the aluminium would form a layer of densified oxidized aluminium, preventing the interior from further corrosion.

• Economical:

The density of 55%AL-Zn is smaller than Zn, therefore, with the same weight and thickness of coating, the galvalume steel sheet is 3% larger in area than that of galvanized steel sheet.

• Easily painted:

There is perfect adhesiveness between galvalume sheet and paint, saving the process of pre-treatment and weathering for painting work.

The coating material on the galvalume steel sheet is outstanding in its adhesiveness, which could be directly tarring on the advertising board and commonly used board with no pre-treatment such as weathering process.

• The galvalume steel sheet's surface is luxury in silver colored appearance.
• Galvalume steel sheet and galvanized steel sheet are similar in performance of processability and painting.

Production application

 

Applications for Galvalume Steel Sheet

Construction: civil and industrial building roofs, facades, substrates for painted rolls, garage doors.

Industrial instruments: electric control cabinets, industrial freezers, vending machines.

Usually, building roofs are the most widely used.

Packaging & Shipping

Company Profile

 

Jinan Zunkai Group founded in 2002, with five branch companies and is well-funded. Our annual sales nearly one billion, about 300,000 tons steel.

Our company is located in Jinan City, Shandong Province. We entered into a strategic partnership with Bao Steel, Laiwu Steel, Rizhao Steel, Handan Steel, Anyang Steel, Maanshan Steel and other domestic large steel companies.

Zunkai is the largest steel agent in Shandong Province, we also have ourselves steel process factory with 100000 Square meter for steel laser cutting, surface treatment and other further processing , and our stock always more than 20,000 tons.

Zunkai Group mainly engaged in : PPGI ,galvanized steel , steel plate , round bar, steel pipe ,Stainless steel product ,angle bar, steel pile ,H beam ,I beam, angle, Channel flat steel etc .

Our good quality and reliable service will be your best trusted partner.
Sincerely wish to building long and regular business with you forever!!!

Certifications

 

Q&A

Q1 : What is your payment terms?
A1 : 30% deposit & balance against B/L or L/C at sight.

Q2 : What is your delivery time & loading port?
A2 : Generally it is within 7 days after received advance payment or L/C. If the goods is not in stock , according to the quantity
it is within 15 days. Loading port:QINGDAO or TIANJIN.

Q3 : Do you have MOQ request ? Can offer free samples?
A3 : Our MOQ is usually ONE ton. Free samples is ok but need pay thecourier charge. Charge can be deduct in future orders.

Q4 : What are your company's main products?
A4 : Our main products are Aluminum products, Steel products, Stainless steel products, Galvanized steel products, Colorized steel Coil, etc.

Q5 : Are you a factory or trading company?
A5 : We have both factory and trading company,own branch factory and warehouse in Shandong Province to provide you nice
goods with best price and good quality.