Import 3004 Coated Aluminum Sheet — Buy in wholesale FOB from Supplier in China

3004 coated aluminum sheet from Mirach Metallurgy Co., Limited is a non-heat-treatable Al-Mn-Mg alloy sheet produced in Chongqing, with approximately 1% magnesium addition over 3003 composition to achieve higher strength with reduced ductility. Mirach supplies this material in temper range HO through H34, with thickness spanning 0.08-6.0 mm (coated) and a narrower 1.0-3.0 mm band also offered, all with thickness tolerance of ±3%. The maximum coating width reaches 2600 mm, accommodating large architectural panel applications. The supplier specifies PE coating at minimum 18 microns, PVDF at minimum 25 microns, and primer at minimum 5 microns, with gloss control from 10-90% per EN ISO-2813:1994 and color matching to RAL, NCS, or Pantone systems using PPG, Beckers, or customer-specified paint brands.

The 3004 alloy's weldability by TIG and MIG methods using matching filler rod distinguishes it from non-weldable 5xxx series alternatives, though heat treatment produces no strengthening effect and annealing is required only for recrystallization after cold work. Hot working proceeds effectively between 500°F and 900°F (260-482°C), typical for Al-Mn alloys. Mirach's coating durability claim of 15-20 years assurance implies PVDF fluoropolymer performance in architectural exposure, though buyers should verify the specific warranty terms, exclusion clauses, and accelerated weathering test data (QUV-A or Florida exposure) supporting this duration. The ±0.002 mm coating thickness tolerance requires precision coil coating line capability; confirm whether this applies across full width or as spot measurement.

Target applications span domestic appliance panels, interior and exterior architectural decoration, curtain wall systems, elevator cladding, and highway tunnel wallboards where color stability and corrosion protection outweigh bare aluminum aesthetics. The 5 MT per specification MOQ reflects mill minimums for color change efficiency in coil coating operations. Standard specifications referenced include ASTM B-209M, BS EN 485-2, BS EN 573-3, YS/T429.2-2000, and GB/T3880-2008, though Mirach's actual certification scope for each standard requires confirmation. Packaging employs protective film and fumigated wooden pallets for seaworthy shipment, with essential inquiry data comprising alloy, temper, dimensions, coating requirements, and end use.

Mirach Metallurgy Co., Limited operates from No.6/f14, Building 9, North Bank Sun Town in Chongqing, China, a major southwestern industrial hub with growing aluminum processing capacity and Yangtze River port access. The supplier holds a 'harbor' trust tier on the platform but shows 0.00% response rate with zero average response hours, suggesting limited or unrecorded inquiry handling that prospective buyers must verify through direct contact. The company positions itself in coated aluminum sheet specialization, offering color-matched architectural coatings with claimed 15-20 year durability, though it does not disclose founding year, employee count, annual tonnage, or specific end-project references in available data.

Mirach's commercial approach emphasizes coating system flexibility (PPG, Beckers, or customer-specified) and wide temper availability across the 3004 alloy range, with explicit MOQ of 5 MT per specification reflecting coil coating operational economics. The supplier references multiple national and international standards (ASTM, BS EN, YS/T, GB/T) but does not indicate which certifications are held, audited, or merely design-targeted. Its Chongqing location offers logistics advantages for western China and Belt-and-Road rail routes, though export port and Incoterms require direct clarification. Buyers should independently verify business registration, coating line capability (number of coats, curing oven type), quality management certification (ISO 9001, ISO 14001), and any existing customer testimonials or project portfolios before committing to volume orders.