Aluminum 2219-T351 vs 2219-T6
Aluminum · 2219 temper comparison
2219-T351 and 2219-T6 are two conditions of the same aluminum grade, 2219: T351 (T3, stress relieved by stretching) versus T6 (solution heat treated and artificially aged). The chemistry is identical, so every difference below comes from the condition. 2219-T6 is the stronger of the two: yield strength 290 MPa (42.1 ksi) against 250 MPa (36.3 ksi) for 2219-T351, about 16% more; tensile strength follows at 415 MPa (60.2 ksi) vs 360 MPa (52.2 ksi). In exchange, 2219-T351 is the more ductile: elongation 15% versus 10% for 2219-T6, and 2219-T6 is harder (115 HB vs 100 HB). 2219-T6 runs hotter in service (200°C vs 150°C continuous).
2219-T351Choose it when the part is bent, formed or impact-loaded.
2219-T6Choose it when strength drives the design, or when the part sees heat.
2219-T351 vs 2219-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)
Elongation at Break
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Hardness, Brinell
Same in both: Elastic (Young's) Modulus 73.8 GPa10.7 Msi · Shear Modulus 27 GPa3.9 Msi · Bulk Modulus 73 GPa10.6 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 2.84 g/cm³0.1 lb/in³ · Melting Point (Solidus) 543°C1,009 °F · Liquidus Temperature 643°C1,189 °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 864 J/kg·K0.21 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 22.3 µm/m·K12.4 µin/in·°F · Latent Heat of Fusion 390 J/g168 BTU/lb · Min Service Temperature -269°C-452 °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) -0.64 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Weldability 85 / 100 · Castability 30 / 100 · Brazeability / Solderability 15 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 205 MJ/kg88,134 BTU/lb · Embodied Carbon (primary production) 12.5 kg CO₂/kg · Embodied Water 1,200 L/kg144 gal/lb · Typical Recycled Content 5%
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.
2219-T351 vs 2219-T6 — frequently asked
Is 2219-T6 stronger than 2219-T351?
Yes. 2219-T6 has a typical yield strength of 290 MPa (42.1 ksi) against 250 MPa (36.3 ksi) for 2219-T351 — about 16% more. Tensile strength is 415 MPa (60.2 ksi) vs 360 MPa (52.2 ksi).
Which condition does FabDigit quote by default, T351 or T6?
T87 is the default 2219 condition in the FabDigit quote flow (neither T351 nor T6). 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 2219-T351 over 2219-T6?
Pick 2219-T351 when the part is bent, formed or impact-loaded. Pick 2219-T6 when strength drives the design, or when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 2219-T351 and 2219-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.