Aluminum 1085-H19 vs 1085-O
Aluminum · 1085 temper comparison
1085-H19 and 1085-O are two conditions of the same aluminum grade, 1085: H19 (strain hardened, extra hard) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. 1085-H19 is the stronger of the two: yield strength 130 MPa (18.9 ksi) against 22 MPa (3.19 ksi) for 1085-O, about 5.9 times as much; tensile strength follows at 140 MPa (20.3 ksi) vs 65 MPa (9.43 ksi). In exchange, 1085-O is the more ductile: elongation 40% versus 3% for 1085-H19, and 1085-H19 is harder (35 HB vs 19 HB). 1085-O runs hotter in service (150°C vs 100°C continuous). On the shop floor, 1085-H19 machines more easily (fair vs poor) and 1085-O welds better (excellent vs very good).
1085-H19Choose it when strength drives the design, or when the part is machined in volume.
1085-OChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
1085-H19 vs 1085-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
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Vickers
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 -250°C-418 °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) -0.85 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 35 / 100 · Brazeability / Solderability 70 / 100 · Polishability 95 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 215 MJ/kg92,433 BTU/lb · Embodied Carbon (primary production) 13 kg CO₂/kg · Embodied Water 1,150 L/kg138 gal/lb · Typical Recycled Content 3%
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.
1085-H19 vs 1085-O — frequently asked
Is 1085-H19 stronger than 1085-O?
Yes. 1085-H19 has a typical yield strength of 130 MPa (18.9 ksi) against 22 MPa (3.19 ksi) for 1085-O — about 5.9 times as much. Tensile strength is 140 MPa (20.3 ksi) vs 65 MPa (9.43 ksi).
Which condition does FabDigit quote by default, H19 or O?
O is the default 1085 condition in the FabDigit quote flow. 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, 1085-H19 or 1085-O?
1085-H19. Its machinability rates fair (38/100) against poor (25/100) for 1085-O; for welding the order is 1085-O first (excellent, 90/100) then 1085-H19 (very good, 80/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1085-H19 and 1085-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.