Aluminum ER5554-H34 vs ER5554-O
Aluminum · ER5554 temper comparison
ER5554-H34 and ER5554-O are two conditions of the same aluminum grade, ER5554: H34 (strain hardened and stabilized, half hard) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. ER5554-H34 is the stronger of the two: yield strength 214 MPa (31 ksi) against 117 MPa (17 ksi) for ER5554-O, about 83% more; tensile strength follows at 290 MPa (42.1 ksi) vs 248 MPa (36 ksi). In exchange, ER5554-O is the more ductile: elongation 25% versus 12% for ER5554-H34, and ER5554-H34 is harder (81 HB vs 62 HB). ER5554-O runs hotter in service (200°C vs 150°C continuous). On the shop floor, ER5554-H34 machines more easily (52 vs 38 out of 100).
ER5554-H34Choose it when strength drives the design, or when the part is machined in volume.
ER5554-OChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
ER5554-H34 vs ER5554-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 70 GPa10.2 Msi · Shear Modulus 26.4 GPa3.8 Msi · Bulk Modulus 69 GPa10 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 2.69 g/cm³0.1 lb/in³ · Melting Point (Solidus) 602°C1,116 °F · Liquidus Temperature 646°C1,195 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 134 W/m·K77.4 BTU/hr·ft·°F · 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.
Same in both: Electrical Conductivity 34 % IACS · Electrical Resistivity 5.07×10⁻⁸ Ω·m2 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.86 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: Castability 45 / 100 · Brazeability / Solderability 15 / 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 1,100 L/kg132 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.
ER5554-H34 vs ER5554-O — frequently asked
Is ER5554-H34 stronger than ER5554-O?
Yes. ER5554-H34 has a typical yield strength of 214 MPa (31 ksi) against 117 MPa (17 ksi) for ER5554-O — about 83% more. Tensile strength is 290 MPa (42.1 ksi) vs 248 MPa (36 ksi).
Which condition does FabDigit quote by default, H34 or O?
AW is the default ER5554 condition in the FabDigit quote flow (neither H34 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, ER5554-H34 or ER5554-O?
ER5554-H34, by a small margin. Both rate fair for machinability — 52/100 against 38/100 for ER5554-O; for welding the order is ER5554-O first (excellent, 95/100) then ER5554-H34 (excellent, 90/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in ER5554-H34 and ER5554-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.