1060 3003 Mill Finish Slitted Aluminum Strip Coil

1060 & 3003 Mill Finish Aluminum Strip Coil

Mill finish aluminum strip coil is precision slit from wider aluminum coil into narrow rolls for transformer winding, stamping, insulation jacketing, hardware fabrication and other industrial converting applications.

Available alloys include 1050, 1060 and 3003 with O, H12, H14, H16 and H18 tempers. The available thickness range is 0.1-4.0mm, with slit widths from 15mm to 1500mm and coil weights from approximately 50kg to 2000kg according to production and equipment requirements.

For transformer winding, high-purity 1050 or 1060 aluminum in a suitable temper is generally selected where electrical conductivity, clean surface and controlled edge condition are critical. For stamping and general fabrication, 3003 and different work-hardened tempers can be selected according to the required strength and forming operation.

Width tolerance, burr height, camber, coil ID, coil OD and winding condition should be specified according to the downstream machine. A ±0.05mm slit-width target can be discussed for suitable material combinations, subject to alloy, temper, thickness and strip width.

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Technical Specifications

For an accurate quotation, provide alloy, temper, thickness, slit width, width tolerance, edge requirement, coil ID, maximum coil OD, coil weight, surface requirement, annual quantity and final application.

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Precision Aluminum Coil Slitting

15mm Minimum Slit Width

Narrow aluminum strip can be slit down to approximately 15mm for suitable material specifications. Minimum width capability depends on sheet thickness, alloy, temper, edge condition and required tolerance.

Width Tolerance Control

A slit-width tolerance target of approximately ±0.05mm can be discussed where the material combination and slitting setup permit. Wider, thicker or harder strip may require a different production tolerance.

Edge Burr Control

Edge burr is an important purchasing parameter for transformer winding, precision stamping and automated feeding. If maximum burr height is critical, provide the numerical acceptance limit and inspection method with the order.

Camber and Strip Tracking

Excessive camber can affect stamping-line feeding, transformer winding and roll-forming equipment. Where strip tracking is critical, specify the allowable camber over an agreed reference length.

Controlled Rewinding

Constant and appropriate winding tension helps maintain coil shape, edge alignment and stable downstream feeding. Coil hardness and winding requirements should be matched to the strip thickness and customer equipment.

1050 and 1060 Aluminum Strip

High-Purity 1xxx-Series Aluminum

1050 and 1060 are high-purity aluminum grades commonly selected where electrical conductivity, formability and a relatively soft aluminum substrate are required.

O Temper

O temper provides a soft annealed condition and can be selected for transformer winding and forming operations requiring greater ductility. Final mechanical and electrical requirements should be specified according to the application.

H12 to H18 Tempers

Work-hardened H12, H14, H16 and H18 conditions provide progressively different combinations of strength and formability. Select the temper according to stamping, bending, stiffness and finished-part requirements.

3003 Aluminum Strip

Aluminum-Manganese Alloy

AA3003 is an aluminum-manganese alloy commonly selected when greater strength than commercially pure 1xxx-series aluminum is required while retaining useful forming capability.

Stamping and Hardware Applications

3003 strip can be evaluated for suitable stamped, punched, bent and formed hardware components. Required temper should be selected according to deformation severity and finished-part strength.

Insulation Jacketing and Cladding

3003 strip can be used for suitable insulation jacketing, cladding accessories and protective metal coverings around insulated piping or equipment. The complete corrosion-control system should consider moisture barriers, seams, drainage and contact with dissimilar metals.

Aluminum Strip for Transformer Winding

Transformer winding strip requires more than alloy and width. Electrical conductivity or resistivity, surface cleanliness, burr height, edge profile, dimensional tolerance and coil geometry can all influence winding and insulation performance.

Recommended Material Direction

1050-O and 1060-O can be evaluated for transformer winding where the required electrical conductivity and mechanical properties are satisfied. Other conductor alloys should be supplied only when required by the transformer design specification.

Electrical Conductivity

If conductivity or maximum electrical resistivity is contractual, provide the required value and test condition. Alloy designation alone should not replace electrical-property verification for transformer conductors.

Edge Quality

Sharp burrs can damage winding paper or film insulation. Transformer manufacturers should therefore define maximum burr height and specify deburred or rounded-edge treatment where required.

Surface Cleanliness

Transformer strip should have a clean mill-finish surface appropriate for the winding process. Requirements for residual oil, stains, oxidation, scratches or surface contamination should be defined where critical.

Coil ID and Winding Equipment

Provide the winding-machine mandrel diameter, maximum coil OD and acceptable coil weight. Standard listed core options include 300mm paper core and 505mm steel core.

Aluminum Strip for Stamping and Hardware Parts

Progressive Stamping

Precision-slit strip can feed progressive stamping lines for suitable small hardware and industrial components. Stable width, controlled camber, edge condition and coil winding are important for consistent feeding.

Bending and Punching

1050, 1060 and 3003 can be selected for suitable bending and punching operations. Final temper should be matched to bend radius, hole geometry, deformation and required finished-part strength.

Deep Forming

Softer tempers can provide greater forming allowance, but no alloy or temper should be guaranteed crack-free for every stamping geometry. Deep or severe forming should be validated using representative production material.

Tooling and Lubrication

Stamping performance also depends on die clearance, tool condition, lubrication, grain direction and feed settings. Material qualification should therefore be performed in the intended manufacturing process.

Aluminum Strip for Pipe and Insulation Jacketing

Pipe Insulation Cladding

Mill-finish 3003 aluminum strip can be evaluated for suitable narrow insulation-jacketing components, fastening bands, cladding details and protective covers used around insulated piping and equipment.

Moisture Barrier Requirements

Bare aluminum alone should not be assumed to prevent all under-jacket corrosion. In applications exposed to condensation or moisture, the complete system may require a suitable moisture barrier between the aluminum and insulation or underlying equipment.

Coastal and Industrial Environments

Coastal salts, industrial contaminants and persistent moisture can increase corrosion risk. Material selection should consider the complete jacketing system, cut edges, seams, drainage and contact with other metals.

Galvanic Compatibility

Where aluminum contacts steel, copper or other metals in the presence of moisture, galvanic compatibility should be considered in the system design.

Decorative and General Industrial Strip

Furniture and Profile Components

Mill-finish strip can be used as raw material for suitable furniture edging, trim profiles and fabricated metal components where the natural aluminum surface is acceptable or a later finishing process will be applied.

Lighting and Electrical Hardware

Suitable strip can be stamped or formed into selected lighting and electrical hardware parts after alloy, mechanical properties, electrical requirements and downstream finishing have been confirmed.

Non-Structural Industrial Components

Selected 1050, 1060 or 3003 strip can be used for suitable non-structural brackets, covers, clips and stamped components where the specified alloy and temper meet the finished-part requirements.

Mill Finish Surface Requirements

Natural Aluminum Surface

Mill finish is the natural rolled aluminum surface without a decorative paint coating. Surface appearance can vary with alloy, rolling condition, temper and production batch.

Surface Defect Control

Where surface appearance or electrical performance is important, define acceptance requirements for scratches, stains, oxidation marks, roll marks, dents and residual oil.

Corrosion Protection

Aluminum naturally forms a thin oxide layer, but mill finish should not be treated as equivalent to a dedicated protective coating. Aggressive outdoor, chemical or marine environments may require additional surface protection or system-level corrosion control.

Coil ID, OD and Coil Weight

300mm Paper Core

A 300mm paper core is available for suitable strip coils where the customer's decoiler or winding equipment is compatible.

505mm Steel Core

A 505mm steel core can be supplied for larger or heavier coils where the downstream equipment and handling system require this configuration.

Mini Coils

Mini coils in the approximate 50-500kg range can be discussed where smaller production equipment, manual handling limits or reduced work-in-process inventory are important.

Large Production Coils

Coil weight can be increased up to approximately 2000kg for suitable specifications. Buyers should provide maximum coil weight, OD and lifting-equipment limits before production.

Production and Slitting Process

Production begins with inspection of the aluminum master coil followed by uncoiling, precision slitting, controlled rewinding, dimensional inspection, edge inspection and final packing.

Incoming Coil Inspection

The master coil is checked against required alloy, temper, gauge and surface requirements before slitting.

Precision Slitting

Slitting setup is adjusted according to strip thickness, required width and edge condition. Cutter condition and knife clearance influence burr, edge deformation and finished tolerance.

Controlled Rewinding

Slit strip is rewound under controlled tension according to width, gauge and coil configuration to support stable coil shape and downstream feeding.

Final Inspection

Finished strip can be checked for width, thickness, edge condition, surface defects, winding condition, coil dimensions and weight according to the order specification.

Quality Control Requirements

Alloy and Temper Verification

Where alloy and temper are contractual, they should be identified on the order and supported by applicable production documentation.

Thickness Tolerance

Provide nominal thickness and required tolerance. Thickness capability can vary across the 0.1-4.0mm product range and should be agreed before production.

Width Tolerance

Specify the required finished width and tolerance. Very tight tolerances such as ±0.05mm should be confirmed against the actual alloy, temper, thickness and slit width.

Burr Height

Where burr is critical, particularly for transformer winding or precision stamping, provide the maximum permitted burr height and inspection method.

Mechanical Properties

If tensile strength, yield strength or elongation is contractual, define the required values according to alloy, temper and thickness rather than using one general range for all strip products.

Electrical Properties

Transformer and other conductor applications should state required electrical conductivity or maximum resistivity where these properties are part of the design specification.

Surface Inspection

Surface acceptance can include limits for scratches, dents, stains, oxidation, oil contamination and roll marks according to final application.

Coil Winding and Alignment

Finished coils should be checked for winding condition, edge alignment and unacceptable telescoping before packing.

Export Packaging

Aluminum strip coils are packed to reduce moisture exposure, edge damage and surface scratching during storage, handling and international transportation.

Individual Coil Protection

Individual coils can be wrapped with protective paper and plastic film with separators between stacked coils where required.

Edge Protection

Edge protectors can be used to reduce impact and strap damage to precision-slit edges during handling and transportation.

Palletized Packing

Coils can be secured to suitable wooden or export pallets using steel strapping and moisture-protective outer wrapping according to shipment requirements.

Shipping Identification

Packing labels can identify alloy, temper, thickness, width, net weight and production batch information according to the order.

Export Documentation

Required MTC, commercial documents, packing lists and other material or destination-specific documentation should be confirmed before order placement. Wood-packaging treatment and related documentation should follow destination-country requirements.

How to Specify Slitted Aluminum Strip Coil

1. Select the Alloy

Specify 1050, 1060 or 3003 according to electrical, forming, strength and corrosion requirements.

2. Select the Temper

Choose O, H12, H14, H16 or H18 according to required ductility, strength and forming process.

3. Specify Thickness

Provide nominal thickness and tolerance within the available 0.1-4.0mm range.

4. Specify Slit Width

Provide the required finished width from 15mm to 1500mm together with the width tolerance.

5. Define Edge Requirements

State whether a standard slit edge, controlled maximum burr, deburred edge or special edge profile is required.

6. Define Coil ID and OD

Specify the decoiler or winding-machine mandrel diameter, maximum coil OD and handling limitations.

7. Specify Coil Weight

Select the preferred coil weight within the available range according to production-line capacity and material handling.

8. Define Surface Requirements

State requirements for mill finish, oil condition, cleanliness, surface scratches, oxidation marks and other appearance characteristics.

9. Define Mechanical or Electrical Requirements

For precision applications, provide required tensile properties, elongation, conductivity, electrical resistivity or other acceptance values rather than relying only on alloy designation.

10. Identify the Final Application

State whether the strip is intended for transformer winding, stamping, pipe-insulation jacketing, hardware, decorative profiles or another industrial process.

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Frequently Asked Questions

Can you hold ±0.05mm width tolerance?

A ±0.05mm width tolerance can be discussed for suitable specifications. Feasibility depends on alloy, temper, strip thickness, finished width and edge requirements.

Is the slit edge completely burr-free?

Precision slitting is used to control burr, but a numerical maximum burr requirement should be provided where edge condition is critical. Transformer winding may also require deburred or rounded edges.

Which aluminum strip is suitable for transformer winding?

1050-O and 1060-O are commonly evaluated for transformer winding because high-purity aluminum can provide suitable electrical conductivity and forming characteristics. Final conductivity, resistivity, gauge and edge requirements should follow the transformer design.

Is 3003 normally used for transformer conductor winding?

Transformer conductor applications generally prioritize high-purity conductive aluminum grades. AA3003 should only be selected where the electrical design and customer specification specifically permit it.

Can 3003 strip be used for stamping?

Yes, suitable tempers of 3003 strip can be evaluated for stamping, punching and bending. The correct temper depends on forming severity and required finished-part strength.

Will the strip never crack during stamping?

No universal crack-free guarantee should be made without considering alloy, temper, bend radius, draw depth, grain direction, tooling and lubrication. Severe forming should be validated with representative material.

Can 3003 strip be used for pipe insulation wrapping?

Yes, suitable 3003 strip can be used for insulation jacketing, narrow cladding components and related protective metal work. The complete system should address moisture barrier, seams and corrosion conditions.

Is bare 3003 aluminum enough for coastal corrosion protection?

Not necessarily. Coastal salt, trapped moisture and galvanic contact can create aggressive corrosion conditions. A suitable moisture barrier, coating or complete corrosion-control system may be required.

Request a Quote for Mill Finish Aluminum Strip Coil

If you are sourcing 1050, 1060 or 3003 mill finish aluminum strip for transformer winding, precision stamping, insulation jacketing or industrial fabrication, send us your alloy, temper, thickness, slit width, edge requirements, coil dimensions and quantity for technical confirmation and quotation.

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