Magnesium Alloy ZC63-T4 vs ZC63-T6
Magnesium Alloy · ZC63 temper comparison
ZC63-T4 and ZC63-T6 are two conditions of the same magnesium alloy grade, ZC63: 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. ZC63-T6 is the stronger of the two: yield strength 145 MPa (21 ksi) against 110 MPa (16 ksi) for ZC63-T4, about 32% more; tensile strength follows at 240 MPa (34.8 ksi) vs 205 MPa (29.7 ksi). In exchange, ZC63-T4 is the more ductile: elongation 8% versus 5% for ZC63-T6, and ZC63-T6 is harder (62 HB vs 55 HB). ZC63-T6 conducts heat better (122 W/m·K vs 108 W/m·K).
ZC63-T4Choose it when the part is bent, formed or impact-loaded.
ZC63-T6Choose it when strength drives the design.
ZC63-T4 vs ZC63-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.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
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
Physical
Density and transition temperatures.
Same in both: Density 1.87 g/cm³0.07 lb/in³ · Melting Point (Solidus) 465°C869 °F · Liquidus Temperature 630°C1,166 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: 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 -100°C-148 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -1.55 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Weldability 35 / 100 · Castability 75 / 100 · Brazeability / Solderability 20 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 320 MJ/kg137,575 BTU/lb · Embodied Carbon (primary production) 33 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.
ZC63-T4 vs ZC63-T6 — frequently asked
Is ZC63-T6 stronger than ZC63-T4?
Yes. ZC63-T6 has a typical yield strength of 145 MPa (21 ksi) against 110 MPa (16 ksi) for ZC63-T4 — about 32% more. Tensile strength is 240 MPa (34.8 ksi) vs 205 MPa (29.7 ksi).
Which condition does FabDigit quote by default, T4 or T6?
T6 is the default ZC63 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 ZC63-T4 over ZC63-T6?
Pick ZC63-T4 when the part is bent, formed or impact-loaded. Pick ZC63-T6 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in ZC63-T4 and ZC63-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.