Aluminum 2014A-T4 vs 2014A-T651
Aluminum · 2014A temper comparison
2014A-T4 and 2014A-T651 are two conditions of the same aluminum grade, 2014A: T4 (solution heat treated and naturally aged) versus T651 (T6, stress relieved by stretching). The chemistry is identical, so every difference below comes from the condition. 2014A-T651 is the stronger of the two: yield strength 415 MPa (60.2 ksi) against 290 MPa (42.1 ksi) for 2014A-T4, about 43% more; tensile strength follows at 470 MPa (68.2 ksi) vs 427 MPa (61.9 ksi). In exchange, 2014A-T4 is the more ductile: elongation 20% versus 9% for 2014A-T651, and 2014A-T651 is harder (135 HB vs 105 HB). 2014A-T651 runs hotter in service (150°C vs 120°C continuous) and 2014A-T651 conducts heat better (155 W/m·K vs 134 W/m·K). On the shop floor, 2014A-T651 machines more easily (80 vs 70 out of 100).
2014A-T4Choose it when the part is bent, formed or impact-loaded.
2014A-T651Choose it when strength drives the design, or when the part sees heat.
2014A-T4 vs 2014A-T651: 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
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 73 GPa10.6 Msi · Shear Modulus 28 GPa4.1 Msi · Bulk Modulus 75 GPa10.9 Msi · Poisson's Ratio 0.33 · Reduction in Area 25%
Physical
Density and transition temperatures.
Same in both: Density 2.8 g/cm³0.1 lb/in³ · Melting Point (Solidus) 507°C945 °F · Liquidus Temperature 638°C1,180 °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 880 J/kg·K0.21 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 22.5 µm/m·K12.5 µin/in·°F · Latent Heat of Fusion 390 J/g168 BTU/lb · Min Service Temperature -196°C-321 °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) -0.78 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 300% · Weldability 25 / 100 · Castability 30 / 100 · Brazeability / Solderability 15 / 100 · Polishability 60 / 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 1,150 L/kg138 gal/lb · Typical Recycled Content 15%
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.
2014A-T4 vs 2014A-T651 — frequently asked
Is 2014A-T651 stronger than 2014A-T4?
Yes. 2014A-T651 has a typical yield strength of 415 MPa (60.2 ksi) against 290 MPa (42.1 ksi) for 2014A-T4 — about 43% more. Tensile strength is 470 MPa (68.2 ksi) vs 427 MPa (61.9 ksi).
Which condition does FabDigit quote by default, T4 or T651?
T651 is the default 2014A 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, 2014A-T4 or 2014A-T651?
2014A-T651, by a small margin. Both rate very good for machinability — 80/100 against 70/100 for 2014A-T4.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 2014A-T4 and 2014A-T651 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.