1100 Aluminum Coil

 

1100 aluminum alloy is a commercially pure aluminum grade used when formability, corrosion resistance, thermal transfer, and clean surface appearance matter more than high mechanical strength. For industrial purchasing teams ordering slit stock, wide coils, blanks, fins, cookware material, reflectors, nameplates, or chemical equipment parts, the largest sourcing risk is usually not chemistry. It is temper selection.

A wrong temper can cause cracking during deep drawing, poor dent resistance after assembly, or unstable flatness after slitting. The following checks help specify 1100 coil clearly and reduce disputes at receiving inspection.

Standards and material identity

1100 is a non-heat-treatable aluminum alloy strengthened mainly by cold working. It is not equivalent to 3003 or 5052; it has much higher purity but lower strength.

Item	Common reference	What to verify on the mill certificate
Chemical composition	Aluminum Association registration, ASTM B209/B209M, EN 573-3	Al minimum 99.00%; Cu generally 0.05-0.20%; controlled Si + Fe and trace elements
Mechanical properties	ASTM B209/B209M, EN 485-2	Temper, tensile strength, yield strength, elongation, test direction
Dimensional tolerance	ASTM B209/B209M, EN 485-4	Thickness, width, camber, edge condition, burr level
Tensile testing	ASTM E8/E8M or ISO 6892-1	Specimen type, gauge length, result per coil or heat lot
Bend testing	ASTM E290, ISO 7438	Bend radius, crack acceptance, test direction

For products supplied as Aluminum Coil, the purchase order should state the alloy, temper, thickness, width, coil ID, maximum OD, unit weight range, edge type, surface requirement, and applicable standard. Do not rely on alloy name alone.

Properties that affect processing

Typical physical data for 1100 aluminum are well established in aluminum handbooks and mill datasheets. Values can vary slightly with temper and measurement method.

Property	Typical value	Practical meaning
Density	About 2.71 g/cm3	Useful for coil weight calculation
Aluminum content	Minimum 99.00%	Good corrosion resistance and workability
Electrical conductivity	About 59% IACS, depending on temper	Suitable for conductive parts when ultra-high conductivity is not required
Thermal conductivity	About 220 W/m·K	Useful for heat transfer panels, fins, and cookware
Heat treatment response	Not heat treatable	Strength changes mainly through cold work, not aging
Weldability	Good with common aluminum welding methods	Surface cleanliness still controls weld quality

Approximate mechanical ranges often seen for 1100 flat-rolled products are shown below. Always use the contracted standard and thickness range for acceptance.

Temper	Typical tensile strength	Typical yield strength	Forming behavior	Common use
O	75-110 MPa	25-35 MPa	Best deep drawing and spinning	Cookware, reflectors, complex formed parts
H12	95-130 MPa	Around 75 MPa	Moderate formability	Light forming, panels
H14	110-145 MPa	Around 95 MPa	Balanced forming and stiffness	Nameplates, general fabrication
H18	150 MPa or higher	High for 1100	Limited forming	Flat parts needing higher hardness

Temper selection: solve the main purchasing problem

If the part is drawn, spun, embossed, or folded tightly, start from O temper. If the part must remain flatter and resist handling dents, evaluate H14. If the product will only be cut and assembled with minimal forming, H18 may be considered, but cracking risk increases sharply.

Use this decision table before placing an order.

Application need	Recommended starting temper	Risk if temper is too hard	Risk if temper is too soft
Deep drawing, spinning, cookware	O	Edge cracking, orange peel after forming	Low stiffness after forming
Sign blanks, nameplates, light stamping	H14	Cracking at sharp corners	Denting, poor handling resistance
Heat exchanger fins	O or H14, depending on fin design	Fin tearing during corrugation	Fin collapse during assembly
Decorative anodized parts	O or H14 with agreed surface class	Cracks visible after anodizing	Handling marks before anodizing
Slit narrow stock	H14 commonly used	Burr sensitivity and coil set	Telescoping, edge wave risk

For comparison projects, 1050 and 1060 offer higher aluminum purity than 1100, while 3003 provides higher strength through manganese addition. When the specification allows substitution, compare forming trials, conductivity requirements, and corrosion environment rather than selecting only by price. The O H14 H24 1060 Aluminum Coil option is often reviewed when higher purity and similar workability are required.

Quality checks before shipment and after receiving

A strong order specification should be measurable. Use the following inspection checklist.

Checkpoint	Method	Acceptance focus
Mill test certificate	Review heat number and coil number	Alloy 1100, temper, standard, chemistry, mechanical values
Thickness	Micrometer or automatic gauge record	Tolerance by standard and agreed commercial tolerance
Width	Caliper or steel tape	Width tolerance after trimming or slitting
Edge quality	Visual and burr measurement	No heavy burr, cracks, serration, or edge collapse
Surface	Inspection under agreed lighting	No oil stain, corrosion, roll marks, black lines, pressure marks beyond agreement
Flatness and coil set	Sample uncoiling	No severe wave affecting downstream feeding
Mechanical test	Tensile and bend test	Strength, elongation, and crack-free bending where required
Packaging	Photo record before loading	Moisture barrier, secure strapping, corner protection, label traceability

For bright surface or anodizing applications, request representative surface samples before mass production. For fin stock or high-speed stamping, ask for trial coil data including burr, camber, and lubricant compatibility.

Packaging, logistics, and price control

1100 is relatively soft, so packaging quality directly affects usable yield. Specify coil eye direction, inner diameter, outer diameter limit, wooden pallet type, moisture-proof paper or film, desiccant, edge protectors, and strapping method. For sea freight, export packaging should reduce condensation risk; white rust and water stains are not corrected by later polishing in many applications.

Price should be evaluated as a formula, not a single number. A transparent quotation normally includes aluminum base price, regional premium, conversion charge, slitting or coating charge if applicable, packaging, freight, payment terms, and exchange-rate rule. The aluminum base is commonly referenced to public market benchmarks such as LME aluminum settlement pricing, while premiums and conversion charges vary by region, gauge, width, surface class, and order schedule.

Use this RFQ format to reduce rework:

RFQ field	Required entry
Alloy and temper	1100-O, 1100-H14, or other specified temper
Standard	ASTM B209/B209M, EN 485/573, or agreed national standard
Size	Thickness x width, tolerance, coil ID, max OD, unit weight
Surface	Mill finish, bright finish, brushed, anodizing-ready, or coated requirement
Edge	Mill edge, trimmed edge, slit edge, burr limit
Testing	MTC, tensile test, bend test, conductivity test if needed
Packaging	Export pallet, eye direction, moisture protection, label format
Commercial terms	Pricing formula, delivery term, shipment period, claim procedure

Before approving production, request one complete sample package: certificate template, label format, packaging photo, and a short strip sample for forming verification. This step is faster than resolving a full-container claim caused by temper mismatch, water staining, or undocumented tolerance assumptions.

Original source: https://www.hm-alu.com/a/1100-aluminum-coil.html