Aluminum 3004-H32 vs 3004-O
Aluminum · 3004 temper comparison
3004-H32 and 3004-O are two conditions of the same aluminum grade, 3004: H32 (strain hardened and stabilized, quarter hard) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. 3004-H32 is the stronger of the two: yield strength 170 MPa (24.7 ksi) against 70 MPa (10.2 ksi) for 3004-O, about 143% more; tensile strength follows at 215 MPa (31.2 ksi) vs 180 MPa (26.1 ksi). In exchange, 3004-O is the more ductile: elongation 22% versus 17% for 3004-H32, and 3004-H32 is harder (52 HB vs 45 HB). 3004-O runs hotter in service (200°C vs 150°C continuous). On the shop floor, 3004-H32 machines more easily (45 vs 35 out of 100).
3004-H32Choose it when strength drives the design, or when the part is machined in volume.
3004-OChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
3004-H32 vs 3004-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 72 GPa10.4 Msi · Poisson's Ratio 0.33 · Compressive Strength 205 MPa29.7 ksi
Physical
Density and transition temperatures.
Same in both: Density 2.72 g/cm³0.1 lb/in³ · Melting Point (Solidus) 629°C1,164 °F · Liquidus Temperature 654°C1,209 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 163 W/m·K94.2 BTU/hr·ft·°F · Specific Heat Capacity 893 J/kg·K0.21 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 23.2 µm/m·K12.9 µin/in·°F · Latent Heat of Fusion 393 J/g169 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 42 % IACS · Electrical Resistivity 4.1×10⁻⁸ Ω·m1.61 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.84 V · Corrosion Resistance 68 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Weldability 88 / 100 · Brazeability / Solderability 45 / 100 · Polishability 55 / 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 55%
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.
3004-H32 vs 3004-O — frequently asked
Is 3004-H32 stronger than 3004-O?
Yes. 3004-H32 has a typical yield strength of 170 MPa (24.7 ksi) against 70 MPa (10.2 ksi) for 3004-O — about 143% more. Tensile strength is 215 MPa (31.2 ksi) vs 180 MPa (26.1 ksi).
Which condition does FabDigit quote by default, H32 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, 3004-H32 or 3004-O?
3004-H32, by a small margin. Both rate fair for machinability — 45/100 against 35/100 for 3004-O.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 3004-H32 and 3004-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.