China-origin aluminum coil manufacturers concentrated in Shandong and Jiangsu are running 10,000 m.t./month production lines as of 2026 listings, with 1100 series continuous-cast (CC) coils shipped at MOQ 100 m.t. from Qingdao and 1000-series mill-finish stock shipped at MOQ 5 m.t. from Shanghai [S1][S2].
Active suppliers on B2B directories cover 1xxx (1100/1050/1060), 3xxx (3003 prepainted), and 8xxx series cast coils in O-H112 temper, with surface treatments spanning mill finish, oxidized, composited, and PVDF high-gloss coating, serving bottle-cap, HVAC evaporator, roofing, and pharmaceutical-foil end-uses [S1][S2][S3][S7].
Alloy Families and Spec Bands Actually Quoted
1100 aluminum coil with continuous-cast (CC) processing ships at 99.0% min Al purity, O-H112 temper, and round/flat shape options, with one Qingdao-listed supplier quoting 10,000 m.t./month line capacity and 100 m.t. MOQ under TT or LC payment terms [S1]. 1000-series generic stock is quoted at 5 m.t. MOQ with the same monthly line capacity from a Shanghai-loading exporter, indicating that sub-100 m.t. trial orders are now commercially routable on the China side [S2].
Prepainted 3003 (3xxx) color-coated aluminum coil is listed at 0.2-4mm thickness by 800-1900mm width, with mill finish and coated surface treatments on round or flat stock, and is targeted at transportation tools, door and window, and decoration applications [S2][S8]. Tuftex's cast coil line runs ISO 9001:2000 plus ISO 14001:2004 dual-certified 1-series and 8-series cast stock at 10,000 kg MOQ and 100,000 kg/month capacity, with oxidized and composited surface options for seal, closure, and liner/wad end-uses [S3].
For higher-end architectural stock, PVDF high-gloss color-coated coils from Zhejiang Deju target curtain-wall and roofing, sitting in the same 0.2-4mm × 800-1900mm envelope as the prepainted 3xxx band but with the fluorocarbon topcoat expected for 25+ year exterior exposure [S7][S8]. Specifying engineers should cross-reference the aluminum alloy selection reference when matching 1xxx vs 3xxx vs 5xxx to formability, strength, and corrosion targets.
Main Coil Types Compared on Selection Criteria
Four product families dominate 2026 B2B listings, and they map cleanly to four decision criteria: alloy purity, surface treatment, formability, and end-use. Continuous-cast 1100 leads on purity (≥99% Al) and ductility for spinning and deep-draw cap stock [S1]. Mill-finish 1xxx sheet and coil lead on low MOQ entry (5 m.t.) for distributors and small fabricators [S2]. Prepainted 3003 (3xxx) coils lead on color-coated stock for roofing and cladding at 0.2-4mm gauge [S8]. Cast 1-series and 8-series coils lead on heavy-gauge closures and cookware discs, where ISO 9001:2000 and ISO 14001:2004 dual certification is a stated supplier capability [S3].
Spec map, current 2026 listings: 1100 CC coil — 99.0% Al min, O-H112, mill finish, MOQ 100 m.t. [S1]; 1000-series generic — O-H112, mill finish or coated, MOQ 5 m.t. [S2]; 3003 prepainted — 0.2-4mm × 800-1900mm, color-coated [S8]; 1/8-series cast — mill finish, oxidized, or composited, MOQ 10,000 kg [S3]. A 12m-long coil at 184cm outer diameter is achievable by design calculation from input sheet gauge and width, as project engineers confirm in supplier Q&A threads [S3]. For alloy-vs-thickness-vs-surface selection logic on the same material family, the aluminum coil selection map lays out the decision tree.
Surface Treatment and Coating Options
Mill finish, oxidation, composited, and PVDF high-gloss are the four surface states quoted across current 2026 supplier catalogs, with color-coated prepainted stock running polyester (PE) and PVDF topcoats depending on outdoor exposure requirements [S2][S7][S8]. Coated aluminum coil paint consumption, per supplier technical guidance, calculates as coating surface area S × 0.12 (thickness in mm) × density 2.71 g/cm³ ÷ paint solid content, with spray-paint transfer efficiency at 70% of brush/roller values — a useful number for RFQ budgeting [S3].
Membrane thickness on coated coil is the primary lever for service life: a thicker PVDF build extends keep-years in architectural exposure, which is why Zhejiang Deju's PVDF high-gloss line is positioned above standard PE-coated 3xxx in the same gauge band [S7][S8]. For facade and roofing applications where the coil feeds aluminum window door or aluminum veneer panel downstream production, PVDF over PE is the de facto specification in 2026 catalogs. Grease spots on the coil end-face, flagged as a recurring supplier QA defect, are traced to inadequate pre-coat cleaning and are cause to reject the lot before slitting [S3].
Supplier Tiers, MOQ, and Capacity Reality
Tier-1 continuous-cast mills on the Okorder B2B platform are quoting 10,000 m.t./month per line with 100 m.t. MOQ and TT or LC payment, anchored at Qingdao and Shanghai loading ports — numbers that match the production scale expected of mid-size Chinese aluminum coil producers [S1][S2]. Tier-2 specialists like Tuftex run 100,000 kg/month cast-coil lines at 10,000 kg MOQ, more aligned with closure, kitchenware, and pharmaceutical-foil converters than with construction stockists [S3]. Zhejiang Deju's PVDF line and Jinan ZhongFu's combined sheet/plate/coil operation (Tianqiao District, Jiluo Road) round out the active 2026 supplier list at the architectural and industrial-fabrication tier [S7][S9].
For procurement planning, the practical 2026 entry points are: 5 m.t. for mill-finish 1xxx trial stock, 10,000 kg for cast 1/8-series, 100 m.t. for 1100 CC production runs, and project-tied volume for prepainted 3003 and PVDF coil — payment terms uniformly TT or LC on these listings [S1][S2][S3][S8]. China-export coil pricing tracks aluminum ingot LME-based input cost plus conversion margin, so RFQ timing aligned to ingot price-stack movement is the single biggest lever for landed-cost reduction.
Standards, Certification, and Application Fit
ISO 9001:2000 quality management plus ISO 14001:2004 environmental management dual certification is the baseline stated by cast-coil exporters, and is the minimum a procurement QA function should require before issuing a PO for closure or pharmaceutical-end-use stock [S3]. National-standards scale tolerance is also claimed for cast-coil thickness uniformity, which matters for downstream stamping and slitting [S3]. Recycled-aluminum content is structurally significant: European end-use recovery rates run 42% for beverage cans, 85% for construction, and 95% for transport, so specifying recycled-content thresholds in RFQs is now a procurement norm, not a sustainability add-on [S1].
End-use fit by alloy: 1100/1050/1060 for household foil, pharmaceutical packaging foil, container foil, HVAC fin stock, and bottle-cap/medical-cap applications [S3][S4]; 3003 prepainted for roofing, cladding, door/window, and transportation [S2][S8]; 1/8-series cast for cookware discs, kitchenware circles, and seal/closure liners [S3]; PVDF-coated for curtain-wall and long-life architectural panels feeding aluminum veneer panel production lines [S7]. Cap-stock and foil-grade 1100 is the workhorse for HVAC evaporator coils replacing copper in finned-tube heat exchangers, with one 2026 listing explicitly recommending aluminum evaporator coils as the cost-and-weight substitute [S6].
Common Sourcing Pitfalls and Engineering Constraints
Coil ductility peaks at 1-hour solid-solution insulation time during casting; extending hold time crystallizes the workpiece and reduces plasticity without further tensile-strength gain — a process parameter to audit in supplier PPAP documentation [S3]. Wall-thickness estimation from gross weight uses density 2.71 g/cm³: gross weight × density = volume, then volume ÷ (width × length) = thickness, with 0.4mm × 1000mm being the narrowest commonly slit commercial width [S3]. Narrow gauges below the standard 1000-1220mm master-coil width require slitting and add per-kilo cost, so RFQs at 44mm wide should be quoted as slit-from-master, not as primary production [S3].
For distributors weighing 1xxx coil supply, the procurement risk surface is: pre-coat cleaning QA (grease-spot rejection) [S3], coating membrane thickness (service-life lever) [S3], and alloy-temper verification for O-H112 range (affects formability) [S1][S3]. A pragmatic 2026 supplier shortlist for a generic 1xxx sourcing program should include at least one continuous-cast mill (Qingdao or Shanghai port, ≥10,000 m.t./month) [S1][S2], one cast-coil specialist (ISO 9001:2000 + ISO 14001:2004 dual-certified) [S3], and one PVDF-coated architectural supplier (Zhejiang Deju class) [S7], with Jinan ZhongFu-style integrated sheet/plate/coil mills as the fallback for non-standard gauges [S9]. Related upstream equipment context for buyers also evaluating mill machinery is captured in the aluminum die casting machine reference.
Trackable signals include 3003 prepainted aluminum coil specifications (0.2-4mm thickness, 800-1900mm width) per S8, PVDF high gloss coating aluminum coil supply from Zhejiang Deju Aluminum Co., Ltd per S7, and the ISO 9001:2000 and ISO 14001:2004 certifications stated in S3. Procurement teams should also monitor the China aluminum extrusion supply map for cross-alloy sourcing overlap, since several Shandong and Jiangsu extrusion mills also run coil stock for downstream profile and panel production.