Magnesium AZ91C-T4 (UNS M11914)
AZ91C-T4 is a cast magnesium alloy that is known for its high strength and good machinability. It is commonly used in a variety of applications, including automotive, aerospace, and marine.
| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Magnesium | Remainder | |
| Aluminum | 8.1% | 9.3% |
| Copper | 0.10% | |
| Manganese | 0.13% | |
| Nickel | 0.01% | |
| Silicon | 0.30% | |
| Zinc | 0.40% | 1.0% |
The following table provides a list of magnesium AZ91C-T4 properties in both SI and US customary/Imperial units.
Click on the icon to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Density | 1810 kg/m3 |
| Mechanical Properties | Metric |
| Tensile Strength (Ultimate) | 275 MPa |
| Tensile Strength (Yield) | 90 MPa |
| Bearing Strength (Ultimate) | 415 MPa |
| Bearing Strength (Yield) | 305 MPa |
| Fatigue Strength # of Cycles 1.0e+8 | 60 MPa |
| Young’s Modulus (E) | 44.8 GPa |
| Shear Modulus (G) | 17 GPa |
| Elongation at Break in 50 mm | 15% |
| Poisson’s Ratio (ν) | 0.35 |
| Brinell Hardness 500 kg load, 10 mm ball | 55 |
| Knoop Hardness Converted from Brinell | 70 |
| Rockwell Hardness | 62 |
| Charpy Impact V-notch | 4.10 J |
| Thermal Properties | Metric |
| Melting Point Incipient Melting | ≥ 421 °C |
| Solidus | 470 °C |
| Liquidus | 595 °C |
| Thermal Conductivity | 72.7 W/m·K |
| Specific Heat Capacity (Cp) | 1047 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 26.0 1/°C |
| Heat of Fusion | 373 J/g |
| Electrical Properties | Metric |
| Electrical Resistivity (T6 Temper) | 1.29×10-5 Ω·cm |
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 Magnesium AZ91C-T4
| Advantages | Disadvantages |
|---|---|
| Lightweight | Corrosion susceptibility |
| Good strength-to-weight ratio | Lower creep resistance |
| Excellent castability | Limited formability |
| Good electrical and thermal conductivity | Higher cost |
| Recycling potential | Fire hazard |
Applications of Magnesium AZ91C-T4
Magnesium AZ91C-T4 alloy finds applications in various industries where lightweight materials with good strength and corrosion resistance are required. Some common applications include:
- Automotive Industry: Magnesium AZ91C-T4 is used in the automotive industry for lightweight components such as engine blocks, transmission cases, intake manifolds, and steering columns.
- Aerospace Industry: The aerospace sector utilizes AZ91C-T4 for applications like aircraft and helicopter components, including structural parts, gearboxes, and fuel systems.
- Electronics and Communication: Magnesium AZ91C-T4 is used in electronic enclosures and communication equipment due to its excellent electrical conductivity and shielding properties.
- Sports Equipment: The alloy is employed in the manufacturing of sports equipment such as golf club heads, tennis rackets, and bicycle frames.
- Medical Devices: Magnesium AZ91C-T4 is utilized in certain medical devices, including surgical tools, orthopedic implants, and braces.
- Consumer Goods: The alloy is used in various consumer goods, such as lightweight cases for laptops, tablets, and cameras.
- Power Tools and Machinery: AZ91C-T4 is employed in the construction of power tools, hand tools, and machinery parts.