Aluminum 2214-T4 vs 2214-T651
Aluminum · 2214 temper comparison
2214-T4 and 2214-T651 are two conditions of the same aluminum grade, 2214: 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. 2214-T651 is the stronger of the two: yield strength 415 MPa (60.2 ksi) against 290 MPa (42.1 ksi) for 2214-T4, about 43% more; tensile strength follows at 470 MPa (68.2 ksi) vs 425 MPa (61.6 ksi). In exchange, 2214-T4 is the more ductile: elongation 18% versus 9% for 2214-T651, and 2214-T651 is harder (135 HB vs 105 HB). 2214-T651 runs hotter in service (150°C vs 100°C continuous) and 2214-T651 conducts heat better (155 W/m·K vs 134 W/m·K). On the shop floor, 2214-T651 machines more easily (very good vs good).
2214-T4Choose it when the part is bent, formed or impact-loaded.
2214-T651Choose it when strength drives the design, or when the part sees heat.
2214-T4 vs 2214-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
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Same in both: Elastic (Young's) Modulus 73 GPa10.6 Msi · Shear Modulus 27.5 GPa4 Msi · Bulk Modulus 75 GPa10.9 Msi · Poisson's Ratio 0.33 · Reduction in Area 25% · Compressive Strength 420 MPa60.9 ksi · Fracture Toughness (K_IC) 25 MPa·√m22.8 ksi·√in · Hardness, Rockwell B 82 HRB · Hardness, Vickers 145 HV
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 864 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 %) 160% · Weldability 25 / 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 1,150 L/kg138 gal/lb · Typical Recycled Content 10%
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.
2214-T4 vs 2214-T651 — frequently asked
Is 2214-T651 stronger than 2214-T4?
Yes. 2214-T651 has a typical yield strength of 415 MPa (60.2 ksi) against 290 MPa (42.1 ksi) for 2214-T4 — about 43% more. Tensile strength is 470 MPa (68.2 ksi) vs 425 MPa (61.6 ksi).
Which condition does FabDigit quote by default, T4 or T651?
Specify the condition in the material field or the drawing note; FabDigit prices the quote for the state you call out.
Which is easier to machine, 2214-T4 or 2214-T651?
2214-T651. Its machinability rates very good (80/100) against good (65/100) for 2214-T4.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 2214-T4 and 2214-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.