Aluminum 2319 vs ER4009
Aluminum · grade comparison
Aluminum 2319 and ER4009 are both aluminum grades. ER4009 is the stronger of the two: yield strength 125 MPa (18.1 ksi) against 110 MPa (16 ksi) for 2319, about 14% more. In exchange, 2319 is the more ductile: elongation 16% versus 3% for ER4009. ER4009 is lighter (2.71 g/cm³ vs 2.84 g/cm³ for 2319) and 2319 runs hotter in service (175°C vs 150°C continuous). On the shop floor, 2319 sits in a lower cost tier (premium, $$$) than ER4009 (high, $$$$).
2319Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
ER4009Choose it when strength drives the design, or when weight is the constraint.
2319 vs ER4009: 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
Shear Modulus
Bulk Modulus
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Same in both: Poisson's Ratio 0.33 · Tensile Strength (Ultimate) 200 MPa29 ksi · Hardness, Brinell 60 HB
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Max Service Temperature (continuous)
Min Service Temperature
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Same in both: Embodied Water 1,150 L/kg138 gal/lb · Typical Recycled Content 10%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
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.
Manufacturing and finishing
| Capability | 2319 | ER4009 |
|---|---|---|
| CNC machining | Yes | — |
| Sheet metal | Yes | — |
| Default condition | — | — |
| Relative cost | $$$ Premium | $$$$ High |
| Min. machined wall | 0.5 mm | — |
| Best machined surface | Ra 0.8 µm | — |
| Anodizing Type II | Yes | — |
| Cerakote | Yes | — |
| Chem Film (Alodine) | Yes | — |
| DLC | Yes | — |
| E-Coating | Yes | — |
| Electropolishing | Yes | — |
| Hard Anodize Type III w/ PTFE | Yes | — |
| Hard Anodizing Type III | Yes | — |
| Nickel Plating | Yes | — |
| PTFE Coating | Yes | — |
| Painting | Yes | — |
| Powder Coating | Yes | — |
They share 4 finishes: Electroless Nickel (EN), Epoxy Coating, Gold Plating, Silver Plating.
2319 vs ER4009 — frequently asked
Is ER4009 stronger than 2319?
Yes. ER4009 has a typical yield strength of 125 MPa (18.1 ksi) against 110 MPa (16 ksi) for 2319 — about 14% more. Tensile strength is 200 MPa (29 ksi) vs 200 MPa (29 ksi).
Which is cheaper, 2319 or ER4009?
2319 is the lower-cost material: it sits in the premium tier ($$$) while ER4009 is high ($$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which welds better, 2319 or ER4009?
2319. Its weldability rates excellent (92/100) against excellent (85/100) for ER4009.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 2319 and ER4009 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.