Aluminum 5040-H32 vs 5040-O
Aluminum · 5040 temper comparison
5040-H32 and 5040-O are two conditions of the same aluminum grade, 5040: H32 (strain hardened and stabilized, quarter hard) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. 5040-H32 is the stronger of the two: yield strength 125 MPa (18.1 ksi) against 55 MPa (7.98 ksi) for 5040-O, about 127% more; tensile strength follows at 165 MPa (23.9 ksi) vs 130 MPa (18.9 ksi). In exchange, 5040-O is the more ductile: elongation 25% versus 12% for 5040-H32, and 5040-H32 is harder (45 HB vs 35 HB). 5040-O runs hotter in service (150°C vs 120°C continuous).
5040-H32Choose it when strength drives the design.
5040-OChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
5040-H32 vs 5040-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 69.5 GPa10.1 Msi · Shear Modulus 26 GPa3.8 Msi · Bulk Modulus 68 GPa9.9 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 2.68 g/cm³0.1 lb/in³ · Melting Point (Solidus) 620°C1,148 °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).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.87 V
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: Brazeability / Solderability 30 / 100 · Polishability 60 / 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 35%
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.
5040-H32 vs 5040-O — frequently asked
Is 5040-H32 stronger than 5040-O?
Yes. 5040-H32 has a typical yield strength of 125 MPa (18.1 ksi) against 55 MPa (7.98 ksi) for 5040-O — about 127% more. Tensile strength is 165 MPa (23.9 ksi) vs 130 MPa (18.9 ksi).
Which condition does FabDigit quote by default, H32 or O?
H34 is the default 5040 condition in the FabDigit quote flow (neither H32 nor O). 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, 5040-H32 or 5040-O?
5040-H32. Its machinability rates fair (36/100) against poor (30/100) for 5040-O.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 5040-H32 and 5040-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.