24 July 2021 3000 Series Aluminum Alloy
3105 Aluminum Alloy Coil
3105 aluminum alloy 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.
3105 aluminum alloy is suitable for work requiring greater strength than 1000 series aluminum alloys, residential siding, mobile homes and sign making. 3105 aluminum alloy welding or torching is not recommended on this product without proper protection due to the painted coating on both sides. Common applications include sign blanks, trailer sides, and wall paneling. It’s lightweight and semi-smooth with a white painted finish.
Chemical Composition:
| Element | Percentage |
|---|---|
| Si | 0.6 |
| Fe | 0.7 |
| Cu | 0.3 |
| Mn | 0.3 - 0.8 |
| Mg | 0.2 - 0.8 |
| Cr | 0.2 |
| Zn | 0.4 |
| Ti | 0.1 |
| Al | Balance |
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 |
Mechanical Properties at different heat treatment and size:
| Temper | Specified Thickness(in) | Tensile Strength - KSI | Elongationin 2 inches % | |||
|---|---|---|---|---|---|---|
| Ultimate | Yield | |||||
| Min | Max | Min | Max | |||
| H12 | 0.017 - 0.019 | 19 | 26 | - | - | 1 |
| H12 | 0.020 - 0.031 | 19 | 26 | - | - | 1 |
| H12 | 0.032 - 0.050 | 19 | 26 | - | - | 2 |
| H12 | 0.051 - 0.080 | 19 | 26 | - | - | 3 |
| H14 | 0.013 - 0.019 | 22 | 29 | - | - | 1 |
| H14 | 0.020 - 0.031 | 22 | 29 | - | - | 1 |
| H14 | 0.032 - 0.050 | 22 | 29 | - | - | 2 |
| H14 | 0.051 - 0.080 | 22 | 29 | - | - | 2 |
| H16 | 0.013 - 0.031 | 25 | 32 | - | - | 1 |
| H16 | 0.032 - 0.050 | 25 | 32 | - | - | 2 |
| H16 | 0.051 - 0.080 | 25 | 32 | - | - | 2 |
| H18 | 0.013 - 0.031 | 28 | - | - | - | 1 |
| H18 | 0.032 - 0.050 | 28 | - | - | - | 1 |
| H18 | 0.051 - 0.080 | 28 | - | - | - | 2 |
| H25 | 0.013 - 0.019 | 23 | - | - | - | 2 |
| H25 | 0.020 - 0.031 | 23 | - | - | - | 3 |
| H25 | 0.032 - 0.050 | 23 | - | - | - | 4 |
| H25 | 0.051 - 0.080 | 23 | - | - | - | 6 |
| O | 0.013 - 0.019 | 14 | 21 | - | - | 16 |
| O | 0.020 - 0.031 | 14 | 21 | - | - | 18 |
| O | 0.032 - 0.080 | 14 | 21 | - | - | 20 |
Machinability
Aluminium / Aluminum 3105 alloy has average machinability. However, its machinability can be increased in harder tempers than in annealed condition. Oil lubricants are used for machining this alloy.
Forming
Aluminium / Aluminum 3105 alloy has good forming characteristics. It is suggested that bend radii should be used in one thickness to 2 t range for annealed H12, H14 and H16 tempers. Bend radii of 2 to 7 t should be used for the H18 temper.
Welding
Aluminium / Aluminum 3105 alloy has good weldability. It can be welded using arc welding method.
Heat Treatment
Aluminium / Aluminum 3105 alloy does not react to heat treatment except during cold working.
Forging
Aluminium / Aluminum 3105 alloy can be forged at the temperatures ranging from 372 to 510°C (700 to 950°F).
Hot working
Aluminium / Aluminum 3105 alloy can be hot worked at 205 to 372°C (400 to 700°F).
Cold Working
Aluminium / Aluminum 3105 alloy has good cold working characteristics in the harder cold worked tempers.
Annealing
Aluminium / Aluminum 3105 alloy is annealed at 344°C (650°F) followed by cooling in air.
Hardening
Aluminium / Aluminum 3105 alloy can be hardened only by cold working in H12, 14, 16, 18 or 25 tempers.
Applications
Aluminium / Aluminum 3105 alloy is used in sheet metal work. It is also used in manufacturing mobile homes, residential siding, and rain carrying goods.