Custom-rolled aluminum coil is broadly available from 0.003 in (0.076 mm) up to 8.255 mm gauge, and from 6.0 mm to 1879 mm slit width, covering 22+ alloys including 1050, 1100, 1145, 1350, 2024, 3003, 3004, 3005, 3104, 3105, 5005, 5050, 5052, 5182, 5657, 5754, 6061, 7075, 9020 and 9030 [S1]. The headline figure for any sourcing decision: gauge tolerance can be held to 1/4 commercial on tight programs, and three suppliers now publish identical mechanical property tables for 5052-H32/H34/H36/H38 down to 0.006 in (0.15 mm) [S1][S5].
For buyers, the real decision is not whether coil exists, it is which alloy-temper-gauge-width combination a mill will hold on a 1–3 week production slot, and what certs come with it. Below is the working map of stock programs, the slitting limits behind them, and the spec line items the buyer's PO has to lock before the mill will accept the order [S1][S8].
Alloy families and what each one is actually stocked for
Stock aluminum coil programs cluster around four families. Commercially pure 1xxx (1100, 1145, 1350) is the deep-drawing and electrical-conductor baseline: Three D Metals lists 1100 and 1350 from 0.003–0.125 in gauge and 0.500–60.00 in width in soft and H-series tempers, with 1350 aimed at transformer and motor windings because of its conductivity [S3]. Maverick Metals adds 1145 to that trio for foil-grade and insulation jacketing work, with MTRs to ASTM B209/B233 shipped per order [S4].
Mn-strengthened 3xxx (3003, 3004, 3005, 3104, 3105) is the building-products workhorse. Mid South Aluminum's core stock is 1100, 3003, 3105 and 5052, with 3105 called out as the most widely used alloy for gutters, downspouts, siding and soffit [S2]. Chalco publishes 3003 coils to ASTM B209 and AMS-QQ-A-250/2 at 0.2–6 mm thickness and up to 2650 mm width, the widest single-mill envelope in the dataset [S10]. Mg-bearing 5xxx (5052, 5182, 5754) and heat-treatable 6xxx/7xxx (6061, 7075) round out the structural and aerospace end [S1][S5].
Gauge and width envelope: stock vs. custom
Three discrete gauge/width tiers show up across suppliers. Tier 1 is the building-products stock window: 0.019–0.032 in (0.48–0.81 mm) gauge at 11.875–24 in (301.6–609.6 mm) width, sold as painted or mill-finish coil for gutters, soffit and trailers [S2]. Tier 2 is the specialty-mill window: 0.1–4.0 mm gauge and 6.0–940 mm width on 1/4-commercial tolerance, with inside diameters of 152.4, 203.2, 254.0, 304.8, 406.4, 508.0 and 609.6 mm and outside diameter up to 1981 mm [S1]. Tier 3 is the heavy-gauge inquiry window: 4.0–8.255 mm gauge at 19–1879 mm width, subject to inquiry rather than catalog stock [S1].
For thin foil and electrical strip, Three D Metals extends the floor to 0.003 in (0.076 mm) and the ceiling to 60.00 in (1524 mm) width on 1100/1350 soft and H-series coil, with a deburred edge available to eliminate ragged slit edges [S3]. On 5052 specifically, Almetals lists 14 in-stock gauges from 0.032 in up to 0.188 in slit to order in O, H32, H34, H36, H38, H39 and H391 tempers, with a 2–3 week turn on in-stock items [S5]. The coil calculator at United Aluminum is a reasonable cross-check for length-from-weight, mass-per-mm-of-width (rated 7.9 kg/mm) and coil OD at a given ID [S1][S7].
Tempers that ship from stock vs. tempers that need a mill run
O (fully annealed) and the H-series cold-work tempers (H32, H34, H36, H38, H39, H391) are the tempers that show up on stock lists; T6 and T651 show up mainly on 6061/7075 plate programs, not on the coil-stock pages reviewed here [S1][S5]. For 5052, the published mechanical-property table is the working spec: H32 holds 31–38 ksi ultimate / 23 ksi minimum yield across 0.017–2.000 in thickness, H34 steps to 34–41 ksi / 26 ksi, H36 to 37–44 ksi / 29 ksi, H38 to 39 ksi minimum ultimate / 32 ksi minimum yield, H391 to 42 ksi minimum / 35 ksi minimum, and O drops to 25–31 ksi ultimate with 9.5 ksi yield [S5]. Elongation in 2 in scales from 2% on H36/H38 thin gauges to 20% on O at 0.114–0.250 in, which is the drawability window that drives stock [S5].
Alloys 1100 and 1350 from Three D Metals are explicitly offered in "soft, H-series" covering 0.003–0.125 in, and Maverick Metals confirms the same dead-soft O to full-hard spread across its 1100/1145/1350 inventory [S3][S4]. All Foils caps stock gauges at 0.040 in (1.02 mm) across the same annealed-through-full-hard temper range, which is the practical ceiling for short-run converter stock rather than mill-direct coil [S9].
Tolerance, ID/OD and the buyer's spec line items
A July 2026 buyer guide restates the baseline that any coil PO has to carry: alloy, temper, thickness, width, tolerance, coil inside diameter, mass, edge condition, surface finish and certification [S8]. United Aluminum publishes 1/4 commercial as its tight gauge tolerance band on the 0.1–4.0 mm window, and 1/2 commercial as the inquiry-tier floor, with seven standard IDs (152.4–609.6 mm) and a 1981 mm OD ceiling on a maximum 7.9 kg per mm of width coil mass [S1].
Surface finish is a separate line item: Z-mill standard at 0.07–0.15 microns Ra, matte at 0.3–0.4 microns Ra, and bright (one or two sides) at 0.025–0.05 microns Ra, all rolled in-house rather than brushed after the fact [S1]. Edge options range from deburred (Three D Metals on 1100/1350) to slit edge standard, with the option of oscillate-wound or cut-to-length on most custom programs [S1][S3]. Coatings (oiling, anodizing, painting, strippable plastic) and IPPC-conformant export packing are inquiry items rather than catalog defaults [S1].
Decision matrix: which alloy-temper-gauge-width for which job
Match the alloy family to the dominant requirement, then the temper to forming severity, then the gauge/width pair to a stock program. 1100-O or 1100-H14 in 0.019–0.032 in at 11.875–24 in covers painted gutter and architectural coil, with 3105-H14 as the slightly stronger mid-range substitute [S2]. 3003-H14 in 0.2–6 mm up to 2650 mm is the wide-width HVAC, roofing and building-product choice per Chalco's ASTM B209 / AMS-QQ-A-250/2 supply [S10]. 5052-H32 in 0.032–0.188 in slit to order covers marine, fuel-tank and trailer panels, with H34, H36, H38 and H391 stepping up the strength ladder without breaking weldability [S5]. 1350-O or H-series in 0.003–0.125 in at 0.500–60.00 in is the only sensible pick for transformer and motor windings where conductivity dominates [S3]. 1145 in foil-grade gauges is the capacitor-foil and insulation-jacketing slot, with 1100 as the general-purpose deep-drawing fallback [S4].
Common pitfalls worth flagging: a "H32" temper on 5052 quoted without a thickness range hides which row of the property table applies, and the difference between H32 at 0.017–0.019 in (4% elongation) and H32 at 0.114–0.250 in (9% elongation) is the difference between a drawable sheet and a crack-prone one [S5]. A "6.0 mm width" coil is below United Aluminum's 19 mm inquiry floor on the heavy-gauge line, so 6.0 mm wide foil and strip is a separate product from heavy-gauge slit coil, not a slitter option on the same mill [S1]. A "custom" temper on 6061 is not the same as a stock T6 plate program; the coil-stock suppliers reviewed here do not list 6061-T6 coil as catalog [S1][S5].
Standards, certifications and traceability
The two standards that show up most often on a coil MTR are ASTM B209 (rolled aluminum sheet and plate, which by extension covers the coil products rolled to that thickness band) and ASTM B233 (electrical-grade aluminum, the spec behind 1350 conductor coil) [S4]. For 3003 specifically, Chalco also cites AMS-QQ-A-250/2 as the aerospace cross-reference, which is the spec to call out on a PO when the part flies [S10]. Alloys 1100, 1145 and 1350 coil from Maverick Metals ships with MTRs to ASTM B209/B233 as the default, which is the floor for any electrical or pressure-vessel-adjacent application [S4].
Chemical composition limits on 5052 are tight enough to be worth quoting: Si 0.25 max, Fe 0.4 max, Cu 0.1 max, Mn 0.1 max, Mg 2.2–2.8, Cr 0.15–0.35, Zn 0.1 max, others each 0.05 max, total others 0.15 max, remainder Al [S5]. That Mg 2.2–2.8 window is what gives 5052 its weldability and salt-spray performance, and it is the line item a chemical-supply dispute gets argued over, not the gauge tolerance. REACH and other regulatory disclosures (water staining guidance, REACH statements, edge-condition tables) are published on the supplier technical-data portals and should be requested at RFQ, not at delivery [S5].
Lead time, MOQ and the inquiry-tier products
Stock programs on 5052, painted building-product coil and 1100/1350 slit strip quote 1–3 week production plus delivery, with JIT shipment and 2–3 week turn on in-stock 5052 gauges as the published benchmarks [S1][S5][S9]. All Foils and United Aluminum both run trial orders through container amounts, so the MOQ floor is effectively a single coil on the custom-rolled side, with the practical floor set by coil mass (7.9 kg/mm of width on United Aluminum's mill) rather than a tonnage minimum [S1][S9].
Products that are not stock and require explicit inquiry: gauges above 4.0 mm, widths above 940 mm in the precision-tolerance band (up to 1879 mm is inquiry-only), narrow widths below 19 mm on the heavy-gauge line, custom surfaces outside the Z-mill / matte / bright envelope, and any coating or packing requirement beyond oiling [S1]. The realistic 2026 sourcing move for a buyer who needs a non-stock envelope is to lock alloy, temper, thickness, width, tolerance, ID, OD, coil mass, edge condition, surface and MTR standard on the RFQ, then accept the 1–3 week mill slot, rather than chasing a catalog line that does not exist [S8].
The next trackable signals to watch: whether more North American distributors add 5052-H32 stock gauges beyond the current 14-line list [S5], whether 3003 wide-coil capacity above 2000 mm tightens on the back of battery-foil demand pulling rolling capacity east, and whether ASTM B209 revisions or AMS-QQ-A-250/2 cross-reference updates land before the next sourcing cycle; these three nodes will set the next round of aluminum coil stock-program changes. Related coverage on 6061 vs 6082 stock and machining, on 2026 aluminum foil pricing and battery-foil pull, and on alumina and bauxite supply risk into 2026 covers the upstream and downstream pressure on these coil programs.
For the relevant spec sheets and selection criteria, see solenoid coil, and construction machinery and equipment.