Description
Aluminum alloy 3105 is essentially a 98% aluminum alloy with minor additions to increase strength over that of alloy 1100 and 3003. It is not hardenable by heat treatment and it has good corrosion resistance, formability and weldability.
Typical applications include general sheet metal work requiring greater strength than is provided by 1000 series aluminum alloys, residential siding, mobile homes and sign making.
Chemical Composition
Chemical Composition (wt%) limits as specified in ASTM B209 and ASME SB209*
| Element | 3105 |
| Silicon | 0.6 |
| Iron | 0.7 |
| Copper | 0.30 |
| Manganese | 0.30-0.8 |
| Magnesium | 0.20-0.8 |
| Chromium | 0.20 |
| Zinc | 0.40 |
| Titanium | 0.10 |
| Aluminum | balance |
| Other Elements (each) | 0.05 |
| Other Elements (total) | 0.15 |
Mechanical Properties
Mechanical property requirements for strain hardened H12 temper (¼ hard) as specified in ASTM B209 and ASME SB209
| Thickness (inch) | Yield Strength Min. (ksi) | Tensile Strength (ksi) |
Elongation (%) Min. |
|
| Min. | Max. | |||
| 0.017 – 0.019 | 15.0 | 19.0 | 26.0 | 1 |
| 0.020 – 0.031 | 15.0 | 19.0 | 26.0 | 1 |
| 0.032 – 0.050 | 15.0 | 19.0 | 26.0 | 2 |
| 0.051 – 0.080 | 15.0 | 19.0 | 26.0 | 3 |
Mechanical property requirements for strain hardened H14 temper (½ hard) as specified in ASTM B209 and ASME SB209
| Thickness (inch) | Yield Strength Min. (ksi) | Tensile Strength (ksi) |
Elongation (%) Min. |
|
| Min. | Max. | |||
| 0.017 – 0.019 | 18.0 | 22.0 | 29.0 | 1 |
| 0.020 – 0.031 | 18.0 | 22.0 | 29.0 | 1 |
| 0.032 – 0.050 | 18.0 | 22.0 | 29.0 | 2 |
| 0.051 – 0.080 | 18.0 | 22.0 | 29.0 | 2 |
Physical Properties
Physical properties for Alloy 3105
| Property | 3105 Data |
| Density, lb/in3 | 0.0983 |
| Modulus of Elasticity, psi | 10.0 x 106 |
| Coefficient of Thermal Expansion, 68-212˚F, /˚F | 12.1 x 10-6 |
| Thermal Conductivity, Btu/ft hr ˚F | 99 |
| Specific Heat, Btu/lb ˚F | 0.214 |
| Electrical Resistivity, Microohm-in | 1.504 |
Standards
Typical standards for Alloy 3105
| 3105 |
| ASTM B209 |
| ASME SB209 |
Data are typical, are provided for informational purposes, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice. We make no representation or warranty as to its accuracy and assume no duty to update. Actual data on any particular product or material may vary from those shown herein.
