Aluminum ZL203-F vs ZL203-T4
Aluminum · ZL203 temper comparison
ZL203-F and ZL203-T4 are two conditions of the same aluminum grade, ZL203: F (as fabricated) versus T4 (solution heat treated and naturally aged). The chemistry is identical, so every difference below comes from the condition. ZL203-T4 is the stronger of the two: yield strength 110 MPa (16 ksi) against 95 MPa (13.8 ksi) for ZL203-F, about 16% more; tensile strength follows at 215 MPa (31.2 ksi) vs 150 MPa (21.8 ksi). ZL203-T4 is the more ductile: elongation 8% versus 2.5% for ZL203-F, and ZL203-T4 is harder (60 HB vs 45 HB). ZL203-F runs hotter in service (150°C vs 120°C continuous).
ZL203-FChoose it when the part sees heat.
ZL203-T4Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
ZL203-F vs ZL203-T4: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all aluminum 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 aluminum 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)
Hardness, Brinell
Same in both: Elastic (Young's) Modulus 70 GPa10.2 Msi · Shear Modulus 26 GPa3.8 Msi · Bulk Modulus 69 GPa10 Msi · Poisson's Ratio 0.33 · Compressive Strength 115 MPa16.7 ksi · Fracture Toughness (K_IC) 20 MPa·√m18.2 ksi·√in
Physical
Density and transition temperatures.
Same in both: Density 2.8 g/cm³0.1 lb/in³ · Melting Point (Solidus) 545°C1,013 °F · Liquidus Temperature 635°C1,175 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 963 J/kg·K0.23 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 23 µm/m·K12.8 µin/in·°F · Latent Heat of Fusion 390 J/g168 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Same in both: Electrical Resistivity 5.2×10⁻⁸ Ω·m2.05 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.7 V · Corrosion Resistance 35 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Same in both: Machinability Rating (AISI 1212 = 100 %) 190% · Weldability 25 / 100 · Formability (cold) 10 / 100 · Castability 45 / 100 · Brazeability / Solderability 20 / 100 · Polishability 45 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 200 MJ/kg85,985 BTU/lb · Embodied Carbon (primary production) 12.5 kg CO₂/kg · Embodied Water 1,100 L/kg132 gal/lb · Typical Recycled Content 25%
Strength versus weight
Yield strength against density for every aluminum grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
ZL203-F vs ZL203-T4 — frequently asked
Is ZL203-T4 stronger than ZL203-F?
Yes. ZL203-T4 has a typical yield strength of 110 MPa (16 ksi) against 95 MPa (13.8 ksi) for ZL203-F — about 16% more. Tensile strength is 215 MPa (31.2 ksi) vs 150 MPa (21.8 ksi).
Which condition does FabDigit quote by default, F or T4?
T4 is the default ZL203 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.
Which is easier to machine, ZL203-F or ZL203-T4?
ZL203-T4, by a small margin. Both rate very good for machinability — 80/100 against 75/100 for ZL203-F.
Ready to make it?
Upload a CAD file and FabDigit prices the part in ZL203-F and ZL203-T4 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.