Aluminum ER2519 vs ER4009
Aluminum · grade comparison
Aluminum ER2519 and ER4009 are both aluminum grades. ER2519 is the stronger of the two: yield strength 165 MPa (23.9 ksi) against 125 MPa (18.1 ksi) for ER4009, about 32% more; tensile strength follows at 290 MPa (42.1 ksi) vs 200 MPa (29 ksi). ER2519 is the more ductile: elongation 7% versus 3% for ER4009, and ER2519 is harder (80 HB vs 60 HB). ER4009 is lighter (2.71 g/cm³ vs 2.82 g/cm³ for ER2519) and ER4009 conducts heat better (145 W/m·K vs 125 W/m·K). On the shop floor, ER4009 welds better (excellent vs good).
ER2519Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
ER4009Choose it when weight is the constraint, or when it will be welded.
ER2519 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
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Same in both: Poisson's Ratio 0.33
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
Same in both: Max Service Temperature (continuous) 150°C302 °F · Min Service Temperature -196°C-321 °F
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
Castability
Brazeability / Solderability
Polishability
Same in both: Formability (cold) 45 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
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 | ER2519 | ER4009 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 4 finishes: Electroless Nickel (EN), Epoxy Coating, Gold Plating, Silver Plating.
ER2519 vs ER4009 — frequently asked
Is ER2519 stronger than ER4009?
Yes. ER2519 has a typical yield strength of 165 MPa (23.9 ksi) against 125 MPa (18.1 ksi) for ER4009 — about 32% more. Tensile strength is 290 MPa (42.1 ksi) vs 200 MPa (29 ksi).
Which is cheaper, ER2519 or ER4009?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, ER2519 or ER4009?
ER2519, by a small margin. Both rate good for machinability — 65/100 against 60/100 for ER4009; for welding the order is ER4009 first (excellent, 85/100) then ER2519 (good, 65/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in ER2519 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.