Aluminum 5457-H28 vs 5457-O
Aluminum · 5457 temper comparison
5457-H28 and 5457-O are two conditions of the same aluminum grade, 5457: H28 (strain hardened and partially annealed, full hard) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. 5457-H28 is the stronger of the two: yield strength 185 MPa (26.8 ksi) against 48 MPa (6.96 ksi) for 5457-O, about 3.9 times as much; tensile strength follows at 205 MPa (29.7 ksi) vs 130 MPa (18.9 ksi). In exchange, 5457-O is the more ductile: elongation 22% versus 6% for 5457-H28, and 5457-H28 is harder (55 HB vs 32 HB). 5457-O runs hotter in service (150°C vs 100°C continuous). On the shop floor, 5457-H28 machines more easily (48 vs 35 out of 100).
5457-H28Choose it when strength drives the design, or when the part is machined in volume.
5457-OChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
5457-H28 vs 5457-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 2.69 g/cm³0.1 lb/in³ · Melting Point (Solidus) 630°C1,166 °F · Liquidus Temperature 654°C1,209 °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) 23.8 µm/m·K13.2 µin/in·°F · Latent Heat of Fusion 397 J/g171 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Same in both: Electrical Resistivity 3.75×10⁻⁸ Ω·m1.48 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.85 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 30% · Brazeability / Solderability 25 / 100 · Polishability 88 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 210 MJ/kg90,284 BTU/lb · Embodied Carbon (primary production) 12 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.
5457-H28 vs 5457-O — frequently asked
Is 5457-H28 stronger than 5457-O?
Yes. 5457-H28 has a typical yield strength of 185 MPa (26.8 ksi) against 48 MPa (6.96 ksi) for 5457-O — about 3.9 times as much. Tensile strength is 205 MPa (29.7 ksi) vs 130 MPa (18.9 ksi).
Which condition does FabDigit quote by default, H28 or O?
H25 is the default 5457 condition in the FabDigit quote flow (neither H28 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, 5457-H28 or 5457-O?
5457-H28, by a small margin. Both rate fair for machinability — 48/100 against 35/100 for 5457-O; for welding the order is 5457-O first (excellent, 88/100) then 5457-H28 (very good, 80/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 5457-H28 and 5457-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.