Magnesium Alloy ZK61A-T5 vs ZK61A-T6
Magnesium Alloy · ZK61A temper comparison
ZK61A-T5 and ZK61A-T6 are two conditions of the same magnesium alloy grade, ZK61A: T5 (cooled from hot working and artificially aged) versus T6 (solution heat treated and artificially aged). The chemistry is identical, so every difference below comes from the condition. ZK61A-T6 is the stronger of the two: yield strength 195 MPa (28.3 ksi) against 185 MPa (26.8 ksi) for ZK61A-T5, about 5% more. ZK61A-T6 is the more ductile: elongation 10% versus 8% for ZK61A-T5, and ZK61A-T6 is harder (70 HB vs 65 HB).
ZK61A-T6Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
ZK61A-T5 vs ZK61A-T6: 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.
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 45 GPa6.5 Msi · Shear Modulus 17 GPa2.5 Msi · Bulk Modulus 45 GPa6.5 Msi · Poisson's Ratio 0.35 · Tensile Strength (Ultimate) 310 MPa45 ksi · Fracture Toughness (K_IC) 14 MPa·√m12.7 ksi·√in
Physical
Density and transition temperatures.
Same in both: Density 1.83 g/cm³0.07 lb/in³ · Melting Point (Solidus) 520°C968 °F · Liquidus Temperature 635°C1,175 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 122 W/m·K70.5 BTU/hr·ft·°F · Specific Heat Capacity 1,000 J/kg·K0.24 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 27 µm/m·K15 µin/in·°F · Latent Heat of Fusion 340 J/g146 BTU/lb · Max Service Temperature (continuous) 120°C248 °F · Min Service Temperature -70°C-94 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 25 % IACS · Electrical Resistivity 6.9×10⁻⁸ Ω·m2.72 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -1.6 V · Corrosion Resistance 22 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Same in both: Machinability 97 / 100 · Machinability Rating (AISI 1212 = 100 %) 400% · Weldability 30 / 100 · Formability (cold) 15 / 100 · Castability 55 / 100 · Brazeability / Solderability 15 / 100 · Polishability 45 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 300 MJ/kg128,977 BTU/lb · Embodied Carbon (primary production) 26 kg CO₂/kg · Embodied Water 500 L/kg59.9 gal/lb · Typical Recycled Content 20%
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.
ZK61A-T5 vs ZK61A-T6 — frequently asked
Is ZK61A-T6 stronger than ZK61A-T5?
Yes. ZK61A-T6 has a typical yield strength of 195 MPa (28.3 ksi) against 185 MPa (26.8 ksi) for ZK61A-T5 — about 5% more. Tensile strength is 310 MPa (45 ksi) vs 310 MPa (45 ksi).
Which condition does FabDigit quote by default, T5 or T6?
T6 is the default ZK61A condition in the FabDigit quote flow. The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
When should I choose ZK61A-T5 over ZK61A-T6?
Pick ZK61A-T6 when strength drives the design, or when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in ZK61A-T5 and ZK61A-T6 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.