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 of Alloy 3105 Color Coated Aluminum Coil

Element of alloy 3015	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 of Alloy 3105 Color Coated Aluminum Coil

Mechanical Properties of Alloy 3105 Color Coated Aluminum Coil

Property of alloy 3015

(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 of Alloy 3105 Color Coated Aluminum Coil

Property of alloy 3015	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 of Alloy 3105 Color Coated Aluminum Coil

Corrosion Resistance

3105 aluminum alloy has good corrosion resistance, especially suitable for corrosive media scenarios such as marine environments and chemical industries. It can maintain stable mechanical properties even in harsh environments such as chloride and acid.

Electrical Conductivity

Its conductivity can reach 41%, and it is commonly used in fields such as electrical components and cable manufacturing.

Processability

It can be processed through various techniques such as deep drawing, riveting, welding, cutting, etc., suitable for making thin-walled parts or precision components with complex shapes. ‌