Henan Gnee New Material Co., Ltd. is one of the most reliable manufacturers and suppliers of ASTM B209 1235-O Aluminum Foil in China. With abundant experience, we warmly welcome you to wholesale high quality ASTM B209 1235-O Aluminum Foil in stock here from our factory. Good service and reasonable price are available.
To request a quote, send thickness, width, core size, roll weight, surface finish and quantity. We confirm specification and lead time before production and return a written quote with MOQ, price and documentation. Request a quote for 1235-O aluminum foil.
Specifications of 1235-O Aluminum Foil
| Item | 1235-O aluminum foil |
|---|---|
| Alloy | 1235 (Al ≥ 99.35%; EN designation EN AW-Al99.35, UNS A91235) |
| Temper | O (annealed); H14 / H18 / H19 available to order |
| Thickness | 0.006–0.2 mm (6–200 μm / 0.0002–0.0079 in) |
| Width | 200–1,800 mm jumbo rolls; slit strips and laser-cut widths to order |
| Core ID / roll OD | 76.2 mm (3") or 152.4 mm (6") core; roll OD up to ~1,100 mm; roll weight up to ~1,000 kg |
| Surface | Mill finish (bright one side / both sides); low-residue deoiled surface for laminating and printing; color coated, PE coated, embossed on request |
| Standards | ASTM B209, ASTM B479, EN 546, GB/T 3198 |
| Mill certificate | EN 10204 3.1 with every lot; 3.2 and third-party inspection on request |
| Lead time | 15–30 days from order confirmation |
| MOQ | Flexible - small trial orders and full-container orders both accepted; larger volumes especially welcome |
What Is 1235-O Aluminum Foil?
1235 belongs to the 1xxx commercially pure aluminum family. Its registered composition guarantees at least 99.35% aluminum content, with iron and silicon controlled as the main residual elements. The trailing digits of the designation follow the 1xxx naming rule: "35" marks the minimum aluminum content of 99.35%. Compared with alloyed foil grades, the high purity brings three practical benefits for buyers: deep ductility after annealing, low electrical resistivity, and a clean surface that prints, coats and laminates without faulting.
The O in 1235-O stands for annealed. After cold rolling, the coil is heat treated to its softest stable condition, which removes work hardening and gives the foil maximum elongation. That is why O temper is the default choice wherever the foil must wrap, fold, emboss or laminate without cracking - soft packaging, cable shielding, adhesive tape stock and capacitor foil. Where stiffness matters more than formability, the same chemistry is supplied as H14, H18 or H19 (see the temper guide below).
Chemical Composition of 1235 Aluminum Foil
| Element | Content (%) |
|---|---|
| Aluminum (Al) | ≥ 99.35 (balance) |
| Silicon + Iron (Si+Fe) | ≤ 0.65 combined |
| Copper (Cu) | ≤ 0.05 |
| Manganese (Mn) | ≤ 0.05 |
| Magnesium (Mg) | ≤ 0.05 |
| Zinc (Zn) | ≤ 0.10 |
| Titanium (Ti) | ≤ 0.06 |
| Vanadium (V) | ≤ 0.05 |
| Other, each | ≤ 0.03 |
Composition limits per EN 573-3 / Aluminum Association registration for 1235. Batch chemistry is confirmed on the mill test certificate; if your specification is tighter than the registered limits (common for electronic-grade lots), tell us at RFQ stage so we route the melt accordingly.
Mechanical and Physical Properties of 1235-O Aluminum Foil
Tensile values for thin foil depend strongly on gauge, so the table below gives typical O-temper bands by thickness range (indicative, confirmed per lot on the MTC):
| Thickness (mm) | Tensile strength, O temper (MPa) | Elongation (min) |
|---|---|---|
| 0.006 – 0.009 | 40 – 100 | 0.5% |
| 0.010 – 0.024 | 40 – 100 | 1% |
| 0.025 – 0.040 | 45 – 100 | 2% |
| 0.041 – 0.089 | 45 – 100 | 4% |
| 0.090 – 0.139 | 50 – 100 | 6% |
| 0.140 – 0.200 | 50 – 100 | 10% |
| H18 (any gauge, for reference) | ≥ 135 | - |
Physical properties of the alloy are essentially those of high-purity aluminum:
| Property | Value |
|---|---|
| Density | 2.70 g/cm³ (0.098 lb/in³) |
| Melting range | ≈ 657 °C (≈ 1,215 °F) |
| Thermal conductivity | ≈ 229 W/(m·K) |
| Electrical conductivity | ≈ 61% IACS (annealed) |
Temper Guide for 1235 Aluminum Foil: O, H14, H18 and H19
1235 is not heat-treatable; its strength comes entirely from cold work, so temper selection is the main performance decision. O temper maximizes ductility for converting. H14 is a half-hard middle ground used for semi-rigid forming. H18 and H19 are full-hard tempers where flatness under tension matters - most famously as the substrate for coated lithium-ion current collector foil. Tell us the end use and we recommend the temper; switching later costs a re-anneal or a re-roll.
| Temper | Condition | Tensile (typical) | Chosen when… |
|---|---|---|---|
| O | Fully annealed (soft) | ≈ 60–100 MPa by gauge | Foil must wrap, fold, laminate or deep-draw - packaging, cable wrap, tape, capacitor stock |
| H14 | Half hard | ≈ 120–140 MPa | Semi-rigid formed parts that hold shape after forming |
| H18 | Full hard | ≥ 135 MPa | Battery current collector substrate; flat web under coating tension |
| H19 | Extra hard | ≥ 150 MPa | Maximum stiffness at minimum gauge |
Applications of 1235-O Aluminum Foil by Thickness
| End use | Temper | Typical gauge | Why 1235-O |
|---|---|---|---|
| Flexible food and pharmaceutical packaging, pouch laminates, blister lidding | O | 6–20 μm | Complete barrier to light, moisture, oxygen and aroma at the thinnest gauges; food-safe high purity |
| Cable wrap and telecommunications shielding | O | 6–40 μm | Wraps complex cable geometry without cracking; EMI shielding as aluminum-plastic laminate strips |
| Adhesive foil tape for electronics (transformers, displays, HVAC joints) | O | 10–50 μm | Clean deoiled surface bonds with acrylic and rubber adhesives; conductive path for EMI shielding |
| Capacitor foil (electrolytic) | O | 6–9 μm | High purity and conductivity for etched anode/cathode stock |
| Lithium-ion battery current collector substrate | O / H18 | 12–35 μm | Clean surface for slurry adhesion; H18 keeps the web flat on coating lines |
| Insulation facing and duct wrap | O | 7–20 μm | Reflective radiant barrier, laminates to glass wool and PE bubble |
| Household and catering foil rolls | O | 9–15 μm | Soft temper dispenses and tears predictably at thin gauge |
Gauge windows are industry-common starting points, not limits - commercial aluminum foil requirements vary by converting line, so we cut and finish to your written specification.
Flexible Packaging Performance of 1235-O Aluminum Foil
Packaging converters buy 1235-O for one reason: it is the most forgiving foil to run. The annealed web laminates to PET, PE, OPP and paper at high speed without pinhole growth or creasing, holds a print register on flexo and gravue lines, and heat-seals through laminating adhesives without burning through at 7–9 μm. Because the alloy contains no heavy alloying elements, the foil also suits food-contact constructions where migration limits apply - pair it with our low-residue deoiled surface (oil residue below 3 mg/m²) and the roll runs cleanly through coating heads and lamination nips.
Capacitor and Battery Uses of 1235-O Aluminum Foil
In electronics, the same soft foil serves two demanding roles. For electrolytic capacitors, 6–9 μm 1235-O is the etching stock: the 99.35% purity keeps the tunnel-etch geometry uniform, and the annealed structure tunnels evenly. For lithium-ion cells, 1235 is the mainstream cathode current collector alloy: current collector lots are normally specified in H18 for flatness, but O temper is used where the coater prefers a more conformable web, and both are produced from the same low-Fe melt practice so surface cleanliness and slurry adhesion stay consistent across tempers.
Pinhole Control in Thin-Gauge 1235 Aluminum Foil
Pinholes - micro through-holes caused by inclusions, roll damage or annealing faults - are the defect that decides yield on thin foil. Risk rises as gauge drops: below 7 μm the web is highly sensitive, 7–12 μm is sensitive, 12–20 μm is moderate, and above 20 μm pinholes become rare while edge quality takes over as the main concern. GNEE's published target for standard gauges is ≤ 1 pinhole per m² with oil residue below 3 mg/m².
A workable purchase specification never just says "no pinholes" - at thin gauges that phrase is untestable. Instead, lock five points at RFQ: inspection method and illumination, maximum pinhole size, allowable count per square meter, the sample area it applies to, and the roll acceptance rule if a sample fails. We return those five points in writing with every offer.
Converting Services: Slitting, Laminating and Coating 1235-O Aluminum Foil
Slitting - jumbo rolls slit to aluminum foil strips from a few millimeters wide for cable and tape lines, burr-controlled edges on every slit coil.
Lamination-ready surfaces - deoiled, low-residue finish wets reliably with laminating adhesives; wetting-tension testing to ASTM D2578 available for coated stock.
Coating and finishing - color coated, PE coated and embossed aluminum foil on request (aluminum foil for embossing uses the O temper for clean pattern take-up); heat-seal coating for lidding and blister formats.
Fixed-length cutting and paper interleaving - for sheet-fed converting and print shops.
Roll maps - joint and splice positions documented per roll so your line never meets an undocumented stop.
How 1235 Compares with 1050, 1060 and 8011 Aluminum Foil
| Alloy | Al min (%) | Position vs 1235-O | Typical foil role |
|---|---|---|---|
| 1235 | 99.35 | Reference grade - balanced purity, rolling stability and cost at ultra-thin gauge | Packaging, battery, capacitor, cable, tape |
| 1050 | 99.50 | Higher purity, marginally better conductivity; less common as battery stock | General converter foil, insulation facing |
| 1060 | 99.60 | Highest purity of the group; softer rolling window | Capacitor foil, reflector and lighting stock |
| 8011 | ≈ 98.3–99.0 | Iron-bearing: stronger and stiffer at equal gauge, lower purity | Container foil, closure stock, cable wrap needing stiffness |
Practical read: if your line needs the thinnest gauge with clean rolling behavior, 1235-O is the default; if the part must hold shape (containers, rigid closures), 8011 carries the higher Fe-driven strength; if conductivity per µm matters most, step to 1060. Send the end use and we quote the right alloy rather than the only one we stock.
Quality Certificates and Testing for 1235-O Aluminum Foil
Dimensions and tolerance - thickness by micrometer/beta gauge report, width and edge quality per slitting inspection record (tolerance basis EN 546-3 or contract).
Mechanical values - tensile and elongation per lot on the EN 10204 3.1 MTC (test reference ASTM E345 / EN 546-2).
Surface and cleanliness - visual inspection for bright/matt finish, oil residue test, wetting tension per ASTM D2578 where coating follows.
Pinholes - optical inspection under the agreed method, size threshold and count limit fixed at RFQ (target ≤ 1/m² on standard gauges).
Third-party inspection - SGS/BV/TÜV can be booked against your checklist before shipment.
Packaging of 1235 Aluminum Foil Jumbo Rolls
Each roll is humidity-sealed (moisture-proof film, desiccant, end caps), suspended on export wooden pallets or in stillages with edge protection, and labeled with alloy, temper, gauge, width, core ID, roll weight, batch number and roll map. Foil is surface-critical cargo, so coils ship eye-to-sky in containers, strap-free where possible, and every pack is photographed before the container door closes. Transit protection for long sea freight can include anti-oxidation paper on request.
Price, MOQ and Lead Time for 1235-O Aluminum Foil
MOQ flexible - small trial coils and full-container industrial aluminum foil orders are both accepted; larger-volume programs get production priority.
Lead time - 15–30 days from order confirmation for standard gauges; custom widths and coated stock quoted per order.
Pricing basis - quoted against the SMM (Shanghai Metals Market) aluminum index, with the conversion charge stated separately so your cost tracks the published market.
Certificates included - EN 10204 3.1 MTC per lot; 3.2 and third-party inspection available.
Response - technical and commercial reply within 24 hours.
FAQ
What information should my 1235 aluminum foil RFQ include?
Thickness and tolerance, width (jumbo or slit strips), core ID and target roll weight, temper, surface finish, pinhole and oil-residue limits if any, quantity, destination port, and the standard you buy against. A complete RFQ quotes back within 24 hours.
Can I get free samples of 1235-O aluminum foil before ordering?
Yes - sample coils from stock gauges can be arranged; you cover the courier. Tell us the test you plan to run (lamination trial, tape coating, etching) so the sample carries the right inspection data.
Which tempers of 1235 aluminum foil does GNEE stock?
O temper is the standard stock condition; H14, H18 and H19 are produced to order, typically on the same 15–30 day lead time as standard lots.
About GNEE
GNEE has supplied wrought aluminum products to international buyers since 2008, with shipments to more than 100 countries and regions. For 1235-O aluminum foil we keep standard gauges in stock and slit, coat or laminate to your specification, supporting ASTM, EN and GB documentation so the certificate matches your purchasing standard. Quantities are flexible from a single trial coil to contract volumes, and every lot ships traceable through its mill certificate and roll map.
Request a quote for 1235-O aluminum foil - send thickness, width, core ID, roll weight, finish, quantity and standard, and GNEE returns a written quote with MTC terms and lead time within 24 hours.
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