Alloy 3105 Color Coated Aluminum Coil

Aluminum 3105 is a wrought aluminum alloy in the 3xxx series, primarily alloyed with manganese (Mn ~0.6–1.0%) and small copper (Cu ~0.1–0.4%), offering good corrosion resistance, formability, and moderate strength. It is widely used in construction (roofing, siding, gutters), automotive components, and packaging due to its ability to withstand atmospheric exposure and be easily rolled, bent, or welded. Heat-treatable in the H1x/H2x temper states (e.g., H14 for semi-hard), it balances workability with durability. Similar to 3003 but with slightly higher Mn for improved tensile properties (~125–205 MPa), it is cost-effective and recyclable, making it a versatile choice for general-purpose applications requiring moderate strength and corrosion resistance.

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Chemical Composition

Element	Content (%)
Aluminum (Al)	97.5
Manganese(Mn)	0.6-1.0
Silicon(Si)	≤0.6
Iron(Fe)	≤0.7
Cooper(Cu)	0.1-0.4
Zinc(Zn)	≤0.25
Other Elements	≤0.05
Total Impurities	≤0.15

Key Properties

Mechanical Properties

Property

(Temper: O)

(H12)

(H14)

(H16)

(H18)

(H22)

(H24)

(H26)

(H28)

Tensile Strength

95-130 MPa

130-165 Mpa

145-185Mpa

170-210Mpa

195-230Mpa

130-165 Mpa

145-185Mpa

170-210Mpa

195-230Mpa

Yield Strength (0.2% offset)

35-60 MPa

110-145 MPa

125-165 MPa

150-190 MPa

175-210 MPa

100-135 MPa

115-155 MPa

140-180 MPa

165-205 MPa

Elongation at Break

18-22%

8-12%

6-10%

4-8%

3-6%

8-12%

6-10%

4-8%

3-6%

Hardness (Rockwell B)

30-40HB

40-50HB

45-55HB

55-75HB

60-70HB

40-50HB

45-55HB

55-75HB

60-70HB

Temper Designations: Commonly used in the O (annealed) temper for maximum ductility or H12/H14 (strain-hardened) for moderate strength improvements.

Physical Properties

Property	Value
Density	2.7 g/cm³
Melting Point	643–657°C
Thermal Conductivity	209 W/m·K
Electrical Conductivity	61% IACS
Thermal Expansion Coefficient	23.1×10⁻⁶/°C (20–100°C)

Advantages

Highest Purity in 1xxx Series

Reduces contamination risks in sensitive applications (e.g., pharmaceuticals, high-purity electronics).

Unmatched Formability

Ideal for ultra-thin gauge products (e.g., foil as thin as 6 microns) and complex geometries.

Cost-Effective Purity

Lower production cost than specialty high-purity alloys (e.g., 1100-H18) while maintaining critical properties.

Environmental Friendliness

100% recyclable with minimal energy loss, aligning with sustainability goals.

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Standards and Specifications

ASTM	B209 , B479 .
ISO	ISO 26204 , ISO 6892, ISO 9001, ISO14001
UNS	A91060 .

Our Capabilities

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