Magnesium AZ91C-T4 (UNS M11914)
AZ91C-T4 is a cast magnesium alloy recognized for its high strength, excellent machinability, and lightweight properties. It is extensively employed across automotive, aerospace, and marine industries due to its favorable balance of mechanical performance and corrosion resistance.
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| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Magnesium | —— | Remainder |
| Aluminum | 8.1% | 9.3% |
| Copper | —— | 0.1% |
| Manganese | 0.13% | —— |
| Nickel | —— | 0.01% |
| Silicon | —— | 0.3% |
| Zinc | 0.4% | 1.0% |
The following table provides a list of magnesium AZ91C-T4 properties in both SI and US customary/Imperial units.
Click on the button 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
AZ91C-T4 is utilized in industries demanding lightweight, durable materials with good corrosion resistance, including the following applications:
- Automotive Industry: Used for lightweight components such as engine blocks, transmission cases, intake manifolds, and steering columns.
- Aerospace Industry: Applied in aircraft and helicopter parts, including structural components, gearboxes, and fuel systems.
- Electronics and Communication: Employed in electronic enclosures and communication devices due to excellent electrical conductivity and shielding.
- Sports Equipment: Manufactured into golf club heads, tennis rackets, and bicycle frames.
- Medical Devices: Utilized in surgical tools, orthopedic implants, and braces.
- Consumer Goods: Incorporated in lightweight cases for laptops, tablets, and cameras.
- Power Tools and Machinery: Used in the construction of power tools, hand tools, and machinery parts.