Our top-tier structural profiles, connectors, and raw material coils engineering complete roofing and framing systems.
Utilizing high-grade AA3003, AA3004, and AA5052 series aluminum elements. Our manufacturing introduces exact alloying elements (Manganese and Magnesium) to refine the grain structure, providing superior tensile strength and localized yield tolerance crucial for structural building profiles.
Architectural aluminum alloys automatically generate a dense aluminum oxide passivation layer. Engineered for ISO 12944 C5-M marine coastal environments, our coils prevent pitting and galvanic corrosion even under intense chloride exposure.
Precision coil forming offsets thermal expansion movements (23.1×10⁻⁶ K⁻¹). Our factory designs architectural profiles to absorb continuous heat expansion and contraction cycles, avoiding roof fastener shear failures over long service lives.
Expert selection of aluminum alloys based on specific mechanical loading requirements, chemical atmospheres, and environmental durability.
| Alloy Series | Common Tempers | Tensile Strength (MPa) | Yield Strength (MPa) | Corrosion Resistance | Recommended Applications |
|---|---|---|---|---|---|
| AA3003 (Al-Mn) | H14, H24 | 140 - 180 | 120 - 150 | High (Standard Atmospheric) | Standard industrial roofs, residential sidings, corrugated sheets. |
| AA3004 (Al-Mn-Mg) | H24, H26 | 180 - 220 | 150 - 190 | Very High (Acid Rain/Slight Marine) | Heavy industrial processing plants, chemical facilities, public facilities. |
| AA3105 (Al-Mn-Mg) | H16, H24 | 150 - 200 | 130 - 170 | Very High | Color-coated building cladding, structural flashing, profiles. |
| AA5052 (Al-Mg) | H32, H34 | 210 - 260 | 170 - 215 | Outstanding (Marine Environments) | Coastal infrastructure, dock structures, high wind pressure areas. |
Established in 1998, our manufacturing complex spans an expansive area of over 70,000 square meters. We are strategically situated just 40 kilometers from Tianjin Xingang Port, the largest commercial port in Northern China, allowing for rapid and highly economical international maritime container shipments.
As a pioneering force in the structural metal industry, we operate multiple automated processing units: 4 pre-galvanized product lines, 8 ERW structural pipe lines, and 3 hot-dipped galvanized processing lines. All systems are governed strictly under the ISO9001 Quality Management System. Utilizing high-efficiency material science, our metal works manufacture advanced structural frames and components designed to support architectural roof envelopes.
We possess three active utility patents, including our proprietary groove pipe, shoulder pipe, and Victaulic connector designs. Our massive industrial layout guarantees that we produce over 300,000 metric tons of custom construction steel and aluminum integrated profiles annually, offering a unified, anti-corrosive building system to engineering clients globally.
Established Year
Industrial Plant Area
Annual Output Capacity
Quality Standard Certified
Our aluminium roofing sheet coils utilize precise multilayer coating technology, resisting solar UV, moisture, and chemical attacks.
PVDF systems contain over 70% Kynar 500/Hylar 5000 resins. Providing unparalleled UV protection, color stability (Chroma delta E ≤ 5 over 20 years), and resistance to chalking in arid, high-intensity sunlight regions.
A cost-effective alternative utilizing highly branched polymer structures. HDP offers high flexibility, excellent scratch resistance, and an optimized surface finish suitable for high-humidity construction environments.
Polyurethane/fluoroethylene alkyl vinyl ether lacquer provides exceptional high-gloss performance (up to 80-90% gloss levels) combined with superb weatherability, perfect for high-end commercial facades.
How our factory ensures material traceability, zero-defect shipping, and optimized cost structures for global contractors.
By coordinating material procurement with major domestic smelting plants, we stabilize pricing against the volatility of the London Metal Exchange (LME) and Shanghai Futures Exchange (SHFE), passing direct cost advantages to our global customers.
Every batch of raw aluminium roofing coil undergoes standard tensile tests, T-bend verification (≤ 2T bend cracking resistance), coating dry film thickness (DFT) tests using electromagnetic probes, and cross-cut adhesion tests.
Coils are wrapped in anti-corrosive VCI paper, securely strapped with steel bands on heavy-duty wooden skids (Eye-to-Sky or Eye-to-Wall orientations) to completely eliminate mechanical friction, humidity oxidation, and physical deformation during transport.
Our processing and manufacturing lines operate under audited quality control parameters, conforming to ASTM B209, EN 485, and DIN compliance.
ISO 9001 Compliance Certificate
TUV SGS Plant Verification
Our engineers and account managers provide customized, multi-language support. Our solutions are deployed in over 50 countries, spanning infrastructure and industrial projects.
In September 2019, our team visited structural engineers in Singapore to confirm building profiles. Our materials earned high praise for structural precision under intense tropical heat and coastal humidity.
In 2019, South Korean project designers visited our facility to inspect manufacturing capacities, establishing a long-term supply agreement for customized metal works.
Our long-term Australian partners returned in November 2018 to perform factory audits and verify metal yield limits for dynamic standing seam roofing projects.
In 2019, procurement officers from India audited structural manufacturers and signed a regular bulk ordering agreement for structural steel and raw building elements.
In June 2017, a delegation from Lebanon placed an immediate order for 1,000 tons of structural tubes and cladding frames to support coastal rebuilding efforts.
Met initially at the Canton Fair in 2018, Saudi Arabian developers signed contract packages for our high-reflectivity roof cladding to lower thermal cooling loads.
Selecting the correct metal roofing alloy is a multi-parameter calculation. While structural steel remains a popular choice for framing, aluminum alloys have become the primary choice for envelope engineering due to their favorable strength-to-weight ratio. A standard 0.7mm aluminum roofing sheet weighs roughly 1.89 kg/m², compared to over 5.5 kg/m² for structural steel sheets of equivalent thickness. This major reduction in roof mass yields massive savings in framing materials and structural support requirements.
When aluminum roofing sheets come into direct contact with structural carbon steel framing, galvanic corrosion can occur due to difference in electrode potential (aluminum acts as an anode, deteriorating rapidly in the presence of moisture). To prevent this, our engineers advise using neoprene, EPDM isolation washers, or non-conductive barrier coatings. Using our galvanized square pipes and structural framing profiles along with our technical separation design ensures maximum safety and durability for the entire roofing structure.
In coastal and high-altitude areas, roofs are exposed to heavy wind uplift forces. Calculating the maximum allowable wind load requires knowing the yield strength of the material and the design of the profile. Standard AA3004 coils, having a minimum yield strength of 150 MPa in H24 temper, offer high wind resistance when formed into deep standing seam profiles. Our engineering team assists developers in calculation checks, detailing exact clip spacing and fastener frequency to ensure roof structural integrity during hurricanes.
Direct answers from our Senior Metallurgists and Structural Engineers to help you make informed procurement decisions.
Browse our selection of specialized tubes, structural angles, and round pipes supporting heavy-duty industrial framing.
Minjie Steel
