Aluminum Alloy 4043 (UNS A94043)
Aluminum 4043 is a welding wire that is commonly used to join various aluminum alloys, especially those that are not heat-treatable. It is a silicon-based alloy with a relatively low melting point and excellent fluidity, which makes it ideal for welding applications.
| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Aluminum | 92.3% | 95.5% |
| Copper | —— | 0.3% |
| Iron | —— | 0.8% |
| Magnesium | —— | 0.05% |
| Manganese | —— | 0.05% |
| Silicon | 4.5% | 6.0% |
| Titanium | —— | 0.2% |
| Zinc | —— | 0.1% |
| Residuals | —— | 0.15% |
The following table provides a list of aluminum 4043 properties in both SI and US customary/Imperial units.
Click on the icon to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Density | 2690 kg/m3 |
| Mechanical Properties | Metric |
| Tensile Strength | 140 - 280 MPa |
| Yield Strength | 70 - 170 MPa |
| Shear Strength | 90 - 130 MPa |
| Elongation at Break | 10 - 20% |
| Poisson’s Ratio (ν) | 0.34 |
| Brinell Hardness | 80 HB |
| Thermal Properties | Metric |
| Melting Point | 570 - 630 °C |
| Thermal Conductivity | 160 W/m·K |
| Specific Heat Capacity (Cp) | 850 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 2.2×10-5 1/°C |
| Electrical Properties | Metric |
| Electrical Conductivity | 2.5×107 S/m |
| Electrical Resistivity | 4.1×10-8 Ω·m |
The values in this table are approximate and can vary depending on various factors such as the specific manufacturing process and heat treatment applied to the alloy.
Advantages & Disadvantages of Aluminum 4043
| Advantages | Disadvantages |
|---|---|
| Good weldability | Lower strength |
| Good corrosion resistance | Limited heat treatability |
| Low cost | Limited ductility |
| High fluidity | Limited availability |
Applications of Aluminum 4043
Aluminum 4043 is a popular aluminum alloy that is used in a variety of applications. Here are some common applications of Aluminum 4043:
- Welding: Aluminum 4043 is primarily used as a welding filler metal due to its excellent weldability and fluidity. It is used to join aluminum components in a wide range of applications, including automotive, aerospace, and construction.
- Wire and cable coatings: Aluminum 4043 is used as a coating material for wires and cables due to its excellent electrical conductivity and corrosion resistance. This makes it well-suited for use in electrical and electronic applications.
- Brazing: Aluminum 4043 can be used in brazing applications where high strength is not required. It is often used in the production of heat exchangers, air conditioning systems, and other refrigeration equipment.
- Structural components: Aluminum 4043 can be used in the production of structural components for various industries, including transportation, construction, and marine. Its good corrosion resistance and low cost make it an attractive option for these applications.
- Heat exchangers: Aluminum 4043 can be used in the production of heat exchangers due to its good thermal conductivity and corrosion resistance. It is often used in the production of automotive radiators and other heat exchange systems.