Magnesium Alloy AZ61A vs ZK30
Magnesium Alloy · grade comparison
Magnesium Alloy AZ61A and ZK30 are both magnesium alloy grades. AZ61A is the stronger of the two: yield strength 230 MPa (33.4 ksi) against 195 MPa (28.3 ksi) for ZK30, about 18% more; tensile strength follows at 310 MPa (45 ksi) vs 275 MPa (39.9 ksi). AZ61A is the more ductile: elongation 16% versus 13% for ZK30. ZK30 conducts heat better (122 W/m·K vs 80 W/m·K). On the shop floor, AZ61A welds better (very good vs poor) and AZ61A sits in a lower cost tier (standard, $$) than ZK30 (high, $$$$).
AZ61AChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
AZ61A vs ZK30: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all magnesium alloy grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all magnesium alloy grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Shear Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Hardness, Brinell
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 45 GPa6.5 Msi · Bulk Modulus 45 GPa6.5 Msi · Poisson's Ratio 0.35 · Charpy V-Notch Impact (RT) 5 J3.7 ft·lbf
Physical
Density and transition temperatures.
Melting Point (Solidus)
Liquidus Temperature
Same in both: Density 1.8 g/cm³0.07 lb/in³
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Max Service Temperature (continuous)
Min Service Temperature
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Polishability
Same in both: Machinability 95 / 100 · Castability 40 / 100 · Brazeability / Solderability 20 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Same in both: Embodied Water 500 L/kg59.9 gal/lb · Typical Recycled Content 25%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
Same in both: Specific Stiffness (E / density) 25 MN·m/kg
Strength versus weight
Yield strength against density for every magnesium alloy grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | AZ61A | ZK30 |
|---|---|---|
| CNC machining | Yes | — |
| Sheet metal | Yes | — |
| Default condition | F | — |
| Relative cost | $$ Standard | $$$$ High |
| Min. machined wall | 0.8 mm | — |
| Best machined surface | Ra 0.8 µm | — |
| Anodizing Type II | Yes | — |
| Chem Film (Alodine) | Yes | — |
| E-Coating | Yes | — |
| Hard Anodize Type III w/ PTFE | Yes | — |
| Hard Anodizing Type III | Yes | — |
| Painting | Yes | — |
| Powder Coating | Yes | — |
AZ61A vs ZK30 — frequently asked
Is AZ61A stronger than ZK30?
Yes. AZ61A has a typical yield strength of 230 MPa (33.4 ksi) against 195 MPa (28.3 ksi) for ZK30 — about 18% more. Tensile strength is 310 MPa (45 ksi) vs 275 MPa (39.9 ksi).
Which is cheaper, AZ61A or ZK30?
AZ61A is the lower-cost material: it sits in the standard tier ($$) while ZK30 is high ($$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which welds better, AZ61A or ZK30?
AZ61A. Its weldability rates very good (70/100) against poor (30/100) for ZK30.
Ready to make it?
Upload a CAD file and FabDigit prices the part in AZ61A and ZK30 side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.