Aluminum 2219-T3 vs 2219-T351
Aluminum · 2219 temper comparison
2219-T3 and 2219-T351 are two conditions of the same aluminum grade, 2219: T3 (solution heat treated, cold worked and naturally aged) versus T351 (T3, stress relieved by stretching). The chemistry is identical, so every difference below comes from the condition. Both yield at about 250 MPa — the mechanical properties are the same, and the difference is in how the stock is processed and what it is certified to (solution heat treated, cold worked and naturally aged versus T3, stress relieved by stretching). 2219-T3 is the more ductile: elongation 17% versus 15% for 2219-T351. 2219-T351 runs hotter in service (150°C vs 120°C continuous).
2219-T3Choose it when the part is bent, formed or impact-loaded.
2219-T351Choose it when the part sees heat.
2219-T3 vs 2219-T351: 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.
Elastic (Young's) Modulus
Bulk Modulus
Elongation at Break
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Same in both: Shear Modulus 27 GPa3.9 Msi · Poisson's Ratio 0.33 · Tensile Strength (Ultimate) 360 MPa52.2 ksi · Yield Strength (0.2% offset) 250 MPa36.3 ksi · Hardness, Brinell 100 HB
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 Resistivity
Same in both: Electrical Conductivity 28 % IACS
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
Formability (cold)
Polishability
Same in both: Machinability Rating (AISI 1212 = 100 %) 60% · Weldability 85 / 100 · Castability 30 / 100 · Brazeability / Solderability 15 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Water
Typical Recycled Content
Same in both: Embodied Energy (primary production) 205 MJ/kg88,134 BTU/lb · Embodied Carbon (primary production) 12.5 kg CO₂/kg
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-T3 vs 2219-T351 — frequently asked
What is the difference between 2219-T3 and 2219-T351?
2219-T3 and 2219-T351 are two conditions of the same aluminum grade, 2219: T3 (solution heat treated, cold worked and naturally aged) versus T351 (T3, stress relieved by stretching). The chemistry is identical, so every difference below comes from the condition. Both yield at about 250 MPa — the mechanical properties are the same, and the difference is in how the stock is processed and what it is certified to (solution heat treated, cold worked and naturally aged versus T3, stress relieved by stretching).
Which condition does FabDigit quote by default, T3 or T351?
T87 is the default 2219 condition in the FabDigit quote flow (neither T3 nor T351). 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-T3 over 2219-T351?
Pick 2219-T3 when the part is bent, formed or impact-loaded. Pick 2219-T351 when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 2219-T3 and 2219-T351 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.