Overview
ZK60A Magnesium Alloy is a high-strength wrought magnesium alloy containing approximately 5.5–6.5% zinc (Zn) and 0.4–1.0% zirconium (Zr). It is one of the strongest commercially available magnesium alloys, offering an exceptional combination of lightweight properties, high tensile strength, fatigue resistance, machinability, and impact performance.
Compared with AZ31B and AZ61A, ZK60A provides significantly higher mechanical strength and fatigue resistance, making it particularly suitable for aerospace, motorsports, military, defense, and high-performance structural applications.
ZK60A magnesium alloy is widely used in:
- Aerospace Components
- Aircraft Structures
- Military Equipment
- Racing Components
- Automotive Performance Parts
- Forged Structural Components
- Sporting Goods
- Lightweight Mechanical Assemblies
Due to its superior strength-to-weight ratio, ZK60A is often considered the premium structural magnesium alloy for high-performance engineering applications.
Material Specification
| Property | Value |
|---|---|
| Material Designation | ZK60A Magnesium Alloy |
| ASTM Standard | ASTM B80 |
| UNS Number | M16600 |
| Material Family | Magnesium-Zinc-Zirconium Alloy |
| Density | 1.83 g/cm³ |
| Magnetic Property | Non-Magnetic |
| Typical Supply Condition | T5, T6 Heat Treated |
| Standard Forms | Bar, Rod, Forgings, Extrusions, Plate |
Chemical Composition
| Element | Content (%) |
|---|---|
| Magnesium (Mg) | Balance |
| Zinc (Zn) | 5.5–6.5 |
| Zirconium (Zr) | 0.4–1.0 |
| Copper (Cu) | ≤0.05 |
| Iron (Fe) | ≤0.005 |
| Nickel (Ni) | ≤0.005 |
| Silicon (Si) | ≤0.05 |
Zinc provides precipitation strengthening while zirconium refines grain structure and improves mechanical properties.
Mechanical Properties
T5 Condition
| Property | Value |
|---|---|
| Tensile Strength | 280–320 MPa |
| Yield Strength | 200–250 MPa |
| Elongation | 8–12% |
| Hardness | 70–90 HB |
| Elastic Modulus | 45 GPa |
T6 Heat Treated Condition
| Property | Value |
|---|---|
| Tensile Strength | 330–370 MPa |
| Yield Strength | 260–310 MPa |
| Elongation | 6–10% |
| Hardness | 85–110 HB |
Physical Properties
| Property | Value |
|---|---|
| Density | 1.83 g/cm³ |
| Melting Point | 500–640°C |
| Thermal Conductivity | 116 W/m·K |
| Electrical Conductivity | 26% IACS |
| Electrical Resistivity | 0.065 μΩ·m |
| Thermal Expansion Coefficient | 26 × 10⁻⁶/K |
| Specific Heat Capacity | 960 J/kg·K |
Strength-to-Weight Ratio
| Material | Density (g/cm³) | Tensile Strength |
|---|---|---|
| ZK60A Magnesium | 1.83 | 370 MPa |
| AZ61A Magnesium | 1.81 | 320 MPa |
| AZ31B Magnesium | 1.77 | 260 MPa |
| Aluminum 6061-T6 | 2.70 | 310 MPa |
| Grade 2 Titanium | 4.51 | 345 MPa |
ZK60A provides one of the highest strength-to-weight ratios among commercially available magnesium alloys.
Corrosion Resistance
| Environment | Performance |
|---|---|
| Indoor Environment | Good |
| Dry Atmosphere | Good |
| Fresh Water | Fair |
| Marine Atmosphere | Moderate |
| Salt Water | Poor |
| Industrial Environment | Fair |
Like most magnesium alloys, ZK60A requires protective coatings for long-term corrosion protection.
Recommended surface treatments:
- Anodizing
- Chromate Conversion Coating
- Ceramic Coating
- Powder Coating
- Electroless Nickel Plating
- Painting
Fatigue Resistance
| Property | Performance |
|---|---|
| Fatigue Strength | Excellent |
| Cyclic Loading Resistance | Excellent |
| Impact Resistance | Excellent |
| Vibration Resistance | Outstanding |
ZK60A is widely selected for aerospace and motorsports applications due to its excellent fatigue characteristics.
Wear Resistance
| Property | Performance |
|---|---|
| Abrasion Resistance | Good |
| Sliding Wear Resistance | Good |
| Impact Resistance | Excellent |
| Structural Durability | Excellent |
Heat treatment significantly improves wear resistance.
Weldability
| Welding Process | Rating |
|---|---|
| TIG Welding | Fair |
| MIG Welding | Fair |
| Resistance Welding | Good |
| Laser Welding | Good |
Welding is generally less preferred than machining or forging for critical structural components.
Machinability
| Process | Rating |
|---|---|
| CNC Turning | Excellent |
| CNC Milling | Excellent |
| Drilling | Excellent |
| Tapping | Excellent |
| Grinding | Good |
Machinability Comparison
| Material | Machinability |
|---|---|
| ZK60A Magnesium | Excellent |
| AZ31B Magnesium | Excellent |
| Aluminum 6061 | Excellent |
| Titanium Grade 5 | Moderate |
| Stainless Steel 304 | Moderate |
ZK60A offers outstanding machinability with low cutting forces and high productivity.
Heat Treatment
Solution Treatment
| Parameter | Value |
|---|---|
| Temperature | 500–520°C |
| Holding Time | 8–12 Hours |
| Cooling Method | Water Quench |
Aging Treatment (T6)
| Parameter | Value |
|---|---|
| Temperature | 150–180°C |
| Holding Time | 12–24 Hours |
| Cooling Method | Air Cool |
Heat Treatability
| Property | Performance |
|---|---|
| Precipitation Hardening | Excellent |
| T6 Response | Outstanding |
| Structural Stability | Excellent |
ZK60A achieves its highest strength in the T6 condition.
International Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM (USA) | ZK60A |
| UNS | M16600 |
| AMS | AMS 4377 |
| EN (Europe) | MgZn6Zr |
| DIN (Germany) | 3.5815 |
| ISO | ZK60A |
| GB/T (China) | ZK60A |
| JIS (Japan) | ZK60A |
Available Forms
| Product Type | Availability |
|---|---|
| Round Bar | Yes |
| Rod | Yes |
| Forgings | Yes |
| Extrusions | Yes |
| Plate | Yes |
| Billets | Yes |
Typical Applications
Aerospace Industry
- Aircraft Structural Components
- Aerospace Brackets
- Lightweight Assemblies
- UAV Components
Defense Industry
- Portable Military Equipment
- Weapon System Components
- Lightweight Structural Parts
Automotive Industry
- Racing Components
- Suspension Parts
- Lightweight Chassis Components
- Performance Vehicle Structures
Sporting Goods Industry
- Bicycle Components
- Racing Equipment
- High-Performance Sporting Products
Industrial Manufacturing
- Lightweight Machinery Components
- Precision Structural Parts
- High-Speed Equipment Components
Robotics Industry
- Lightweight Robot Arms
- Precision Motion Systems
- Structural Assemblies
Manufacturing Characteristics
| Manufacturing Process | Rating |
|---|---|
| CNC Machining | Outstanding |
| Forging | Excellent |
| Extrusion | Excellent |
| Heat Treatment | Excellent |
| Welding | Fair |
| Surface Finishing | Excellent |
Advantages
Extremely High Strength-to-Weight Ratio
One of the strongest commercially available magnesium alloys.
Excellent Fatigue Resistance
Suitable for aerospace and motorsport applications.
Outstanding Machinability
High productivity and low tooling costs.
Lightweight
Approximately 32% lighter than aluminum and 77% lighter than steel.
Excellent Impact Performance
Performs well under dynamic loading conditions.
Heat Treatable
Can achieve significantly improved mechanical properties through T6 aging.
Limitations
Lower Corrosion Resistance
Protective coatings are generally required.
Reduced Weldability
Not as weldable as AZ-series magnesium alloys.
Higher Material Cost
More expensive than AZ31B and AZ61A.
Limited Availability
Less commonly stocked than general-purpose magnesium alloys.
Comparison with Other Magnesium Alloys
| Property | ZK60A | AZ80A | AZ61A | AZ31B |
|---|---|---|---|---|
| Strength | Highest | Very High | High | Moderate |
| Fatigue Resistance | Excellent | Excellent | Very Good | Good |
| Machinability | Excellent | Good | Excellent | Excellent |
| Formability | Moderate | Moderate | Good | Excellent |
| Heat Treatability | Excellent | Excellent | Limited | Limited |
Comparison with Common Lightweight Materials
| Material | Density | Tensile Strength | Strength-to-Weight Ratio |
|---|---|---|---|
| ZK60A Magnesium | 1.83 g/cm³ | 370 MPa | Outstanding |
| Aluminum 6061-T6 | 2.70 g/cm³ | 310 MPa | Excellent |
| Titanium Grade 2 | 4.51 g/cm³ | 345 MPa | Excellent |
| Carbon Steel A36 | 7.85 g/cm³ | 400 MPa | Moderate |
Available Surface Finishes
Raw Finishes
- Mill Finish
- T5 Finish
- T6 Heat Treated Finish
Functional Finishes
- Precision Machined Finish
- Polished Finish
- Bead Blasted Finish
Protective Finishes
- Anodized Finish
- Chromate Conversion Coating
- Powder Coating
- Ceramic Coating
Frequently Asked Questions (FAQ)
What is ZK60A magnesium alloy?
ZK60A is a high-strength magnesium-zinc-zirconium alloy designed for aerospace, defense, and lightweight structural applications.
What is ZK60A used for?
Typical applications include:
- Aerospace Components
- Military Equipment
- Racing Components
- Lightweight Structural Parts
- Sporting Goods
What is the equivalent material to ZK60A?
Common equivalents include:
- UNS M16600
- AMS 4377
- MgZn6Zr
- DIN 3.5815
What is the difference between ZK60A and AZ31B?
| Property | ZK60A | AZ31B |
|---|---|---|
| Strength | Much Higher | Lower |
| Fatigue Resistance | Better | Good |
| Heat Treatability | Excellent | Limited |
| Cost | Higher | Lower |
Is ZK60A corrosion resistant?
ZK60A offers moderate corrosion resistance and generally requires protective coatings.
Can ZK60A be welded?
Yes, but weldability is lower than AZ-series magnesium alloys and welding should be carefully controlled.
Why choose ZK60A magnesium?
Because it combines:
- Extremely High Strength
- Lightweight Performance
- Excellent Fatigue Resistance
- Outstanding Machinability
- Heat Treatability
Is ZK60A suitable for aerospace applications?
Yes. ZK60A is widely used for aerospace structures and lightweight high-performance components.
Does GCNOV provide custom manufacturing services for ZK60A magnesium?
Yes. GCNOV provides:
- CNC Machining
- Magnesium Alloy Fabrication
- Precision Milling
- Aerospace Component Manufacturing
- Surface Finishing
- Prototype Development
- Low-Volume Production
- Mass Production