Aluminum 8079-H14 vs 8079-O
Aluminum · 8079 temper comparison
8079-H14 and 8079-O are two conditions of the same aluminum grade, 8079: H14 (strain hardened, half hard) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. 8079-H14 is the stronger of the two: yield strength 105 MPa (15.2 ksi) against 35 MPa (5.08 ksi) for 8079-O, about 3.0 times as much; tensile strength follows at 125 MPa (18.1 ksi) vs 85 MPa (12.3 ksi). In exchange, 8079-O is the more ductile: elongation 25% versus 6% for 8079-H14, and 8079-H14 is harder (35 HB vs 22 HB). 8079-O runs hotter in service (150°C vs 130°C continuous).
8079-H14Choose it when strength drives the design.
8079-OChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
8079-H14 vs 8079-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 69 GPa10 Msi · Shear Modulus 26 GPa3.8 Msi · Bulk Modulus 70 GPa10.2 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 2.72 g/cm³0.1 lb/in³ · Melting Point (Solidus) 645°C1,193 °F · Liquidus Temperature 655°C1,211 °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 900 J/kg·K0.21 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 23.6 µm/m·K13.1 µin/in·°F · Latent Heat of Fusion 395 J/g170 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.83 V · Corrosion Resistance 72 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Castability 60 / 100 · Brazeability / Solderability 55 / 100 · Polishability 50 / 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 1,200 L/kg144 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.
8079-H14 vs 8079-O — frequently asked
Is 8079-H14 stronger than 8079-O?
Yes. 8079-H14 has a typical yield strength of 105 MPa (15.2 ksi) against 35 MPa (5.08 ksi) for 8079-O — about 3.0 times as much. Tensile strength is 125 MPa (18.1 ksi) vs 85 MPa (12.3 ksi).
Which condition does FabDigit quote by default, H14 or O?
Specify the condition in the material field or the drawing note; FabDigit prices the quote for the state you call out.
Which is easier to machine, 8079-H14 or 8079-O?
8079-H14. Its machinability rates fair (35/100) against poor (30/100) for 8079-O; for welding the order is 8079-O first (very good, 75/100) then 8079-H14 (very good, 70/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 8079-H14 and 8079-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.