Aluminum 2419-T351 vs 2419-T851
Aluminum · 2419 temper comparison
2419-T351 and 2419-T851 are two conditions of the same aluminum grade, 2419: T351 (T3, stress relieved by stretching) versus T851 (T8, stress relieved by stretching). The chemistry is identical, so every difference below comes from the condition. 2419-T851 is the stronger of the two: yield strength 350 MPa (50.8 ksi) against 250 MPa (36.3 ksi) for 2419-T351, about 40% more; tensile strength follows at 455 MPa (66 ksi) vs 360 MPa (52.2 ksi). In exchange, 2419-T351 is the more ductile: elongation 16% versus 10% for 2419-T851, and 2419-T851 is harder (130 HB vs 100 HB). 2419-T851 runs hotter in service (175°C vs 120°C continuous). On the shop floor, 2419-T851 machines more easily (very good vs good).
2419-T351Choose it when the part is bent, formed or impact-loaded.
2419-T851Choose it when strength drives the design, or when the part sees heat.
2419-T351 vs 2419-T851: 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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 73.1 GPa10.6 Msi · Shear Modulus 27 GPa3.9 Msi · Bulk Modulus 75 GPa10.9 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 389 J/g167 BTU/lb · Min Service Temperature -253°C-423 °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) -0.8 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Same in both: 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.
2419-T351 vs 2419-T851 — frequently asked
Is 2419-T851 stronger than 2419-T351?
Yes. 2419-T851 has a typical yield strength of 350 MPa (50.8 ksi) against 250 MPa (36.3 ksi) for 2419-T351 — about 40% more. Tensile strength is 455 MPa (66 ksi) vs 360 MPa (52.2 ksi).
Which condition does FabDigit quote by default, T351 or T851?
T851 is the default 2419 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, 2419-T351 or 2419-T851?
2419-T851. Its machinability rates very good (75/100) against good (65/100) for 2419-T351.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 2419-T351 and 2419-T851 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.