Aluminum 4104-F vs 4104-O
Aluminum · 4104 temper comparison
4104-F and 4104-O are two conditions of the same aluminum grade, 4104: F (as fabricated) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. 4104-F is the stronger of the two: yield strength 80 MPa (11.6 ksi) against 70 MPa (10.2 ksi) for 4104-O, about 14% more. In exchange, 4104-O is the more ductile: elongation 18% versus 6% for 4104-F, and 4104-F is harder (50 HB vs 45 HB).
4104-FChoose it when strength drives the design.
4104-OChoose it when the part is bent, formed or impact-loaded.
4104-F vs 4104-O: 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 72 GPa10.4 Msi · Shear Modulus 27 GPa3.9 Msi · Bulk Modulus 71 GPa10.3 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 2.66 g/cm³0.1 lb/in³ · Melting Point (Solidus) 559°C1,038 °F · Liquidus Temperature 596°C1,105 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 160 W/m·K92.4 BTU/hr·ft·°F · Specific Heat Capacity 880 J/kg·K0.21 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 20 µm/m·K11.1 µin/in·°F · Latent Heat of Fusion 450 J/g193 BTU/lb · Max Service Temperature (continuous) 150°C302 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 40 % IACS · Electrical Resistivity 4.3×10⁻⁸ Ω·m1.69 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.82 V · Corrosion Resistance 45 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 30% · Weldability 35 / 100 · Castability 80 / 100 · Brazeability / Solderability 97 / 100 · Polishability 30 / 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 1,150 L/kg138 gal/lb · Typical Recycled Content 20%
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.
4104-F vs 4104-O — frequently asked
Is 4104-F stronger than 4104-O?
Yes. 4104-F has a typical yield strength of 80 MPa (11.6 ksi) against 70 MPa (10.2 ksi) for 4104-O — about 14% more. Tensile strength is 150 MPa (21.8 ksi) vs 165 MPa (23.9 ksi).
Which condition does FabDigit quote by default, F or O?
O is the default 4104 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 4104-F over 4104-O?
Pick 4104-F when strength drives the design. Pick 4104-O when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 4104-F and 4104-O 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.