Aluminum 1145-H14 vs 1145-O
Aluminum · 1145 temper comparison
1145-H14 and 1145-O are two conditions of the same aluminum grade, 1145: H14 (strain hardened, half hard) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. 1145-H14 is the stronger of the two: yield strength 95 MPa (13.8 ksi) against 25 MPa (3.63 ksi) for 1145-O, about 3.8 times as much; tensile strength follows at 110 MPa (16 ksi) vs 75 MPa (10.9 ksi). In exchange, 1145-O is the more ductile: elongation 35% versus 9% for 1145-H14, and 1145-H14 is harder (32 HB vs 21 HB). 1145-O runs hotter in service (200°C vs 110°C continuous).
1145-H14Choose it when strength drives the design.
1145-OChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
1145-H14 vs 1145-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 75 GPa10.9 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 2.7 g/cm³0.1 lb/in³ · Melting Point (Solidus) 646°C1,195 °F · Liquidus Temperature 657°C1,215 °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 397 J/g171 BTU/lb · Min Service Temperature -270°C-454 °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) -0.84 V
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 %) 45% · Weldability 90 / 100 · Castability 35 / 100 · Brazeability / Solderability 60 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 205 MJ/kg88,134 BTU/lb · Embodied Carbon (primary production) 12.5 kg CO₂/kg · Embodied Water 1,200 L/kg144 gal/lb · Typical Recycled Content 15%
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.
1145-H14 vs 1145-O — frequently asked
Is 1145-H14 stronger than 1145-O?
Yes. 1145-H14 has a typical yield strength of 95 MPa (13.8 ksi) against 25 MPa (3.63 ksi) for 1145-O — about 3.8 times as much. Tensile strength is 110 MPa (16 ksi) vs 75 MPa (10.9 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, 1145-H14 or 1145-O?
1145-H14, by a small margin. Both rate poor for machinability — 30/100 against 22/100 for 1145-O.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1145-H14 and 1145-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.