Magnesium Alloy AZ63A-T4 vs AZ63A-T6
Magnesium Alloy · AZ63A temper comparison
AZ63A-T4 and AZ63A-T6 are two conditions of the same magnesium alloy grade, AZ63A: T4 (solution heat treated and naturally aged) versus T6 (solution heat treated and artificially aged). The chemistry is identical, so every difference below comes from the condition. AZ63A-T6 is the stronger of the two: yield strength 130 MPa (18.9 ksi) against 95 MPa (13.8 ksi) for AZ63A-T4, about 37% more. In exchange, AZ63A-T4 is the more ductile: elongation 12% versus 5% for AZ63A-T6, and AZ63A-T6 is harder (73 HB vs 55 HB).
AZ63A-T4Choose it when the part is bent, formed or impact-loaded.
AZ63A-T6Choose it when strength drives the design.
AZ63A-T4 vs AZ63A-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)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
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) 275 MPa39.9 ksi
Physical
Density and transition temperatures.
Same in both: Density 1.84 g/cm³0.07 lb/in³ · Melting Point (Solidus) 455°C851 °F · Liquidus Temperature 610°C1,130 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 1,050 J/kg·K0.25 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 26 µm/m·K14.4 µin/in·°F · Latent Heat of Fusion 373 J/g160 BTU/lb · Max Service Temperature (continuous) 120°C248 °F · Min Service Temperature -100°C-148 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 14 % IACS · Electrical Resistivity 1.22×10⁻⁷ Ω·m4.8 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -1.57 V · Corrosion Resistance 22 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Same in both: Machinability 95 / 100 · Machinability Rating (AISI 1212 = 100 %) 400% · Weldability 65 / 100 · Formability (cold) 15 / 100 · Castability 80 / 100 · Brazeability / Solderability 25 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 330 MJ/kg141,875 BTU/lb · Embodied Carbon (primary production) 27 kg CO₂/kg · Embodied Water 500 L/kg59.9 gal/lb · Typical Recycled Content 30%
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.
AZ63A-T4 vs AZ63A-T6 — frequently asked
Is AZ63A-T6 stronger than AZ63A-T4?
Yes. AZ63A-T6 has a typical yield strength of 130 MPa (18.9 ksi) against 95 MPa (13.8 ksi) for AZ63A-T4 — about 37% more. Tensile strength is 275 MPa (39.9 ksi) vs 275 MPa (39.9 ksi).
Which condition does FabDigit quote by default, T4 or T6?
T6 is the default AZ63A 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 AZ63A-T4 over AZ63A-T6?
Pick AZ63A-T4 when the part is bent, formed or impact-loaded. Pick AZ63A-T6 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in AZ63A-T4 and AZ63A-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.