Aluminum 336.0-T551 vs 336.0-T6
Aluminum · 336.0 temper comparison
336.0-T551 and 336.0-T6 are two conditions of the same aluminum grade, 336.0: T551 (cast, artificially aged (stabilized) without solution treatment) versus T6 (solution heat treated and artificially aged). The chemistry is identical, so every difference below comes from the condition. 336.0-T6 is the stronger of the two: yield strength 250 MPa (36.3 ksi) against 193 MPa (28 ksi) for 336.0-T551, about 30% more; tensile strength follows at 290 MPa (42.1 ksi) vs 248 MPa (36 ksi). 336.0-T6 is harder — 115 HB against 105 HB for 336.0-T551 — which matters for wear surfaces and threads. 336.0-T551 runs hotter in service (250°C vs 220°C continuous).
336.0-T551Choose it when the part sees heat.
336.0-T6Choose it when strength drives the design, or when surface hardness matters.
336.0-T551 vs 336.0-T6: 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)
Charpy V-Notch Impact (RT)
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%
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.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: 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-T551 vs 336.0-T6 — frequently asked
Is 336.0-T6 stronger than 336.0-T551?
Yes. 336.0-T6 has a typical yield strength of 250 MPa (36.3 ksi) against 193 MPa (28 ksi) for 336.0-T551 — about 30% more. Tensile strength is 290 MPa (42.1 ksi) vs 248 MPa (36 ksi).
Which condition does FabDigit quote by default, T551 or T6?
T551 is the default 336.0 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.
When should I choose 336.0-T551 over 336.0-T6?
Pick 336.0-T551 when the part sees heat. Pick 336.0-T6 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-T551 and 336.0-T6 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.