Galvalume Steel Manufacturer & Supplier – Sino East Steel Group
Sino East Steel Group is a professional galvalume steel manufacturer and galvalume coil supplier based in Tianjin, China. Since 2008, our ISO 9001:2015 certified factory has supplied aluminum-zinc coated steel — commonly called galvalume or aluzinc — to buyers in more than 80 countries. As a factory-direct aluzinc sheet factory, we offer zinc aluminum coated steel wholesale programs at mill-level pricing, with a flexible minimum order of 5 tons for stock sizes and 20 tons for custom specifications. Production and delivery cycles run 15–30 days, and all cargo ships from Tianjin Xingang Port under FOB, CIF, CFR or DDP terms.
Our continuous coating lines produce galvalume coil from 0.15 mm to 2.5 mm in thickness and 600 mm to 1250 mm in width, with coating weights from AZ50 to AZ180 g/m². The coating alloy contains 55% aluminium, 43.5% zinc and 1.5% silicon, giving the product its combination of long service life, heat reflection and cut-edge protection. Products are produced to ASTM A792, EN 10346 or GB/T 14978, and every shipment can include a full mill test certificate and third-party inspection by SGS, BV or TÜV.
Why Choose Sino East Steel Group as Your Galvalume Coil Supplier?
Galvalume is a higher-value coated product, and coating consistency decides how many years of service your roofing or cladding will deliver. Choosing the right galvalume steel manufacturer matters because the alloy composition, coating weight and surface treatment must all be controlled within tight limits. With 30+ years of steelmaking and coating experience, Sino East Steel Group delivers that consistency coil after coil, backed by export service that has satisfied buyers across Asia, the Middle East, Africa, Europe and the Americas.
1. Factory-Direct Manufacturing, No Middlemen
We are the galvalume steel manufacturer behind the brand. Our integrated operation covers substrate supply, galvanizing and aluminium-zinc alloy coating on continuous lines, plus slitting and cut-to-length processing. Buying directly from the aluzinc sheet factory removes trader margins, gives you direct production access, and means the engineers who answer your questions control the coating process from start to finish.
2. Full International Standards Compliance
Our zinc aluminum coated steel wholesale orders are produced to ASTM A792 for North America, EN 10346 for Europe and GB/T 14978 for Chinese and Asian markets. We supply substrate grades such as DX51D+AZ and S250GD, with coating weight, spangle-free surface and passivation confirmed in the mill test certificate. Each coil number is traceable through the entire production record.
3. Stable Quality with Multi-Step Inspection
Coating quality is verified continuously: coating weight is checked by weight-loss testing at three positions across the strip, alloy adhesion is validated by bending tests, and surface finish, spangle uniformity and coil integrity are inspected coil by coil. In-line thickness gauges monitor substrate gauge, and a final random re-test is performed before packing, so your galvalume coil arrives with uniform coating and clean, straight edges.
4. Flexible Supply for All Project Scales
From 5 tons of stock galvalume coil for a roofing contractor to 500 tons of custom-width material for a national building program, our scheduling system adapts to your plan. We can mix coating weights and thicknesses in one container, support call-off programs for repeat buyers, and keep buffer stock of popular specifications for urgent dispatch.
Galvalume Product Range
As a full-range galvalume coil supplier, we cover the product forms most demanded by roofing, construction and appliance markets. All are available in coil, sheet or cut-to-length form.
Galvalume Steel Coil (AZ50 – AZ180)
Our core product, galvalume steel coil, carries an aluminium-zinc alloy coating of AZ50 to AZ180 g/m² applied in a continuous hot-dip process. The high aluminium content gives outstanding corrosion resistance, heat reflectivity and scratch resistance compared with pure zinc coatings, making it the material of choice for roofing, wall cladding, gutters, ducts and appliance housings in demanding climates.
Galvalume Roofing Sheet
We supply galvalume roofing sheet in corrugated and trapezoidal profiles, produced from our own coil on roll-forming lines. Standard profiles include popular corrugated, wave and trapezoid designs used across Asia, Africa and the Middle East, with custom profiles available for large projects. Sheets are supplied in exact lengths, with drilling, flashing and accessories arranged on request.
Color Coated Galvalume
Color coated galvalume (often called GL color coated steel) applies polyester, SMP or PVDF paint over the aluminium-zinc coating, combining the long service life of galvalume with a decorative finish. Hundreds of RAL colors and stone-pattern finishes are available. It is widely used for premium roofing and wall cladding, sandwich panel faces, garage doors and architectural applications.
Galvalume Specifications
The table below shows our standard production range. Please confirm coating weight, thickness, width and standard when requesting a quotation.
| Parameter | Available Range |
|---|---|
| Thickness | 0.15 – 2.5 mm |
| Width | 600 – 1250 mm (slitting available) |
| Coating Weight | AZ50 – AZ180 g/m² |
| Coating Alloy | 55% Al / 43.5% Zn / 1.5% Si |
| Steel Grade | DX51D+AZ, AZM, S250GD |
| Standard | ASTM A792, EN 10346, GB/T 14978 |
| Coil Inner Diameter | 508 mm |
| Surface | Spangle-free, passivated, oiled, anti-fingerprint (optional) |
Reference Weight per Meter (Width 1000 mm)
Theoretical weight in kg per meter of strip, calculated at a density of 7.85 g/cm³. Actual weight varies slightly with coating weight.
| Thickness (mm) | Weight (kg/m) |
|---|---|
| 0.15 | 1.18 |
| 0.30 | 2.36 |
| 0.50 | 3.93 |
| 0.80 | 6.28 |
| 1.00 | 7.85 |
| 1.50 | 11.78 |
| 2.00 | 15.70 |
| 2.50 | 19.63 |
Typical Applications of Galvalume Steel
- Roofing and wall cladding for residential, commercial and industrial buildings
- Corrugated and trapezoidal metal roofing sheets for export roofing programs
- Gutters, downspouts, ridge caps and roof accessories
- Sandwich panel faces for cold storage and prefabricated buildings
- Air ducts, HVAC casings and insulation facings
- Silos, grain storage, agricultural buildings and carports
- Appliance housings, heat shields and automotive heat management components
Why the Aluminium-Zinc Coating Outperforms Pure Zinc
The 55% aluminium content in the galvalume coating fundamentally changes how the product corrodes. Instead of the uniform sacrificial action of pure zinc, the aluminium-zinc alloy forms a fine, protective layer that combines three benefits. First, long-term corrosion resistance: in neutral and mildly acidic atmospheres, galvalume typically delivers two to four times the service life of conventional hot-dip galvanized steel of the same coating weight. Second, cut-edge protection: the zinc fraction in the alloy still protects exposed cut edges sacrificially, while the aluminium-rich matrix resists corrosion across the surface. Third, heat reflection: the light alloy surface reflects solar heat, reducing building cooling loads — an important benefit in tropical and desert markets where most of our galvalume roofing is installed. These properties make galvalume the preferred choice for roofing and cladding in coastal, industrial and high-temperature environments. For buyers running zinc aluminum coated steel wholesale programs, the lower lifetime cost — fewer replacements, less maintenance and reduced building cooling loads — typically outweighs the modest price premium over conventional galvanized material, which is why galvalume increasingly dominates premium roofing specifications worldwide.
How We Ensure Reliable Export Service
Galvalume roofing programs are often large and time-sensitive, so our export department treats every order as a project with its own schedule, packing plan and documentation set.
Export Experience Across 80+ Countries
Our galvalume and color coated products are installed on roofs from the Arabian Gulf to Southeast Asia, Africa and South America. We understand climate-specific requirements — heavier coating for coastal salt air, specific profiles for regional roofing markets, and container packing patterns that keep sheets flat and coils undamaged — and we plan each shipment accordingly with our long-term freight partners in Tianjin.
Professional Export Documentation
Every shipment includes commercial invoice, packing list, bill of lading, mill test certificate and certificate of origin, plus destination-specific documents such as Form A, GSP certificates, fumigation certificates and third-party inspection reports. Our documentation team clears the paperwork so your galvalume cargo moves smoothly through export and import customs.
Flexible Payment and Incoterms
We accept T/T with 30% deposit and 70% balance before shipment, and L/C at sight for qualified buyers. FOB Tianjin is standard, with CFR, CIF and DDP available for key markets. Buyer-nominated inspection before loading is welcome, so you confirm coating weight and dimensions before the vessel departs.
Pricing, MOQ & Delivery
- Price: USD 620 – 1050 per ton FOB Tianjin, depending on coating weight, thickness, width, surface treatment and quantity.
- MOQ: 5 tons for stock specifications; 20 tons for custom widths, coating weights or profiles.
- Payment: T/T, 30% deposit and 70% before shipment, or L/C at sight.
- Delivery: 15 – 30 days after confirmation of deposit, depending on specifications and quantity.
- Packing: Horizontal coils with waterproof wrapping, edge protection and steel-framed support; roofing sheets bundled flat on steel pallets with protective interleaving and steel straps.
- Port of Loading: Tianjin Xingang Port, China.
Buyer’s Guide: How to Choose a Reliable Galvalume Steel Supplier
Start with the coating weight, because it is the single biggest driver of both service life and price. AZ50–AZ80 suits indoor and mild inland exposure, AZ100–AZ150 is the common choice for roofing in normal outdoor climates, and AZ150–AZ180 is recommended for coastal and industrial environments. Second, confirm the coating alloy: a genuine galvalume product carries the 55% aluminium / 43.5% zinc / 1.5% silicon composition per ASTM A792, and the mill test certificate should state it. Third, verify the supplier is a real galvalume steel manufacturer with coating lines rather than a trader: request factory information, production evidence and traceable certificates. Fourth, if you buy roofing sheets, check that profiles, gauge and finish are produced to your drawings and that sheet dimensions are verified before loading. Finally, compare delivered cost including freight and packing, and place a trial order before committing to a large roofing program.
How to Get a Quotation
Send us your coating weight, thickness, width, steel grade, quantity and destination port, and our export engineers will confirm availability and pricing within 12–24 hours. If you need roofing sheets, tell us the profile, length and color. We will recommend the most economical coating specification for your climate, quote packing and freight options, and confirm the production window. Contact us through the website form, email or WhatsApp — every inquiry is answered by a steel export specialist.
Frequently Asked Questions (FAQ)
Q1: What is the difference between galvalume (aluzinc) and galvanized steel?
Galvanized steel is coated with pure zinc, while galvalume (aluzinc) is coated with an alloy of 55% aluminium, 43.5% zinc and 1.5% silicon. The aluminium-rich coating gives galvalume roughly two to four times the service life of galvanized steel of the same coating weight in most atmospheres, plus better heat reflection and scratch resistance, at a slightly higher price.
Q2: What do AZ50 / AZ100 / AZ180 coating weights mean?
AZ numbers state the total coating mass on both sides of the sheet in grams per square meter. AZ50 is about 50 g/m² total, AZ100 about 100 g/m², and AZ180 about 180 g/m². Higher coating weight means longer service life and higher cost; the right choice depends on your climate and the required design life of the building.
Q3: Is galvalume suitable for roofing in coastal areas?
Yes, with the right specification. For coastal salt-laden atmospheres we recommend AZ150–AZ180 coating weight, which provides excellent corrosion resistance, and for very aggressive coastal or industrial environments a PVDF color coated galvalume offers the longest protection. Our engineers can recommend the specification for your exact site conditions.
Q4: Can galvalume be color coated?
Yes. Color coated galvalume applies polyester, SMP or PVDF paint over the aluminium-zinc coating, combining galvalume service life with decorative colors. We supply hundreds of RAL colors plus stone-pattern finishes, and custom colors for large projects.
Q5: Can galvalume coil be formed and bent without cracking the coating?
Yes. The galvalume coating is designed for forming: our material passes adhesion and bending tests before release, and it can be roll-formed into roofing profiles, bent on press brakes and deep drawn for appliance parts. Using the correct bending radius and tooling prevents micro-cracking, and our engineers can advise on forming parameters.
Q6: What is the service life of galvalume roofing?
With an appropriate coating weight (AZ100–AZ180) and correct installation, galvalume roofing typically provides 20–40 years of service in normal outdoor environments, and substantially longer in dry climates. In aggressive coastal or industrial environments, a heavier coating or color coated finish extends service life further. Exact life depends on site conditions, design and maintenance.
Contact Sino East Steel Group today – send your galvalume requirements and receive a factory-direct quotation, a mill test certificate sample and a delivery schedule within 24 hours. Choose a galvalume steel manufacturer with 30+ years of export experience in Tianjin, China.