Aluminum 336.0-T6 vs 336.0-T65
Aluminum · 336.0 temper comparison
336.0-T6 and 336.0-T65 are two conditions of the same aluminum grade, 336.0: T6 (solution heat treated and artificially aged) versus T65 (solution heat treated and fully artificially aged). The chemistry is identical, so every difference below comes from the condition. 336.0-T65 is the stronger of the two: yield strength 296 MPa (42.9 ksi) against 250 MPa (36.3 ksi) for 336.0-T6, about 18% more; tensile strength follows at 324 MPa (47 ksi) vs 290 MPa (42.1 ksi). 336.0-T65 is harder — 125 HB against 115 HB for 336.0-T6 — which matters for wear surfaces and threads. 336.0-T6 runs hotter in service (220°C vs 200°C continuous).
336.0-T6Choose it when the part sees heat.
336.0-T65Choose it when strength drives the design, or when surface hardness matters.
336.0-T6 vs 336.0-T65: 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)
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Hardness, Brinell
Same in both: Elastic (Young's) Modulus 90 GPa13.1 Msi · Shear Modulus 34 GPa4.9 Msi · Bulk Modulus 76 GPa11 Msi · Poisson's Ratio 0.33 · Elongation at Break 0.5% · Charpy V-Notch Impact (RT) 2 J1.1 ft·lbf
Physical
Density and transition temperatures.
Same in both: Density 2.72 g/cm³0.1 lb/in³ · Melting Point (Solidus) 538°C1,000 °F · Liquidus Temperature 566°C1,051 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 110 W/m·K63.6 BTU/hr·ft·°F · Specific Heat Capacity 963 J/kg·K0.23 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 19 µm/m·K10.6 µin/in·°F · Latent Heat of Fusion 480 J/g206 BTU/lb · Min Service Temperature -195°C-319 °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) -0.79 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 78 / 100 · Brazeability / Solderability 15 / 100 · Polishability 40 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 150 MJ/kg64,488 BTU/lb · Embodied Carbon (primary production) 9.5 kg CO₂/kg · Embodied Water 1,150 L/kg138 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.
336.0-T6 vs 336.0-T65 — frequently asked
Is 336.0-T65 stronger than 336.0-T6?
Yes. 336.0-T65 has a typical yield strength of 296 MPa (42.9 ksi) against 250 MPa (36.3 ksi) for 336.0-T6 — about 18% more. Tensile strength is 324 MPa (47 ksi) vs 290 MPa (42.1 ksi).
Which condition does FabDigit quote by default, T6 or T65?
T551 is the default 336.0 condition in the FabDigit quote flow (neither T6 nor T65). 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.
When should I choose 336.0-T6 over 336.0-T65?
Pick 336.0-T6 when the part sees heat. Pick 336.0-T65 when strength drives the design, or when surface hardness matters.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 336.0-T6 and 336.0-T65 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.