Aluminum 319 vs AL25
Aluminum · grade comparison
Aluminum 319 and AL25 are both aluminum grades. AL25 is the stronger of the two: yield strength 180 MPa (26.1 ksi) against 124 MPa (18 ksi) for 319, about 45% more; tensile strength follows at 200 MPa (29 ksi) vs 186 MPa (27 ksi). In exchange, 319 is the more ductile: elongation 2% versus 0.6% for AL25, and AL25 is harder (95 HB vs 70 HB). AL25 is stiffer (80 GPa vs 74 GPa) and AL25 runs hotter in service (250°C vs 200°C continuous). On the shop floor, 319 machines more easily (very good vs fair), 319 welds better (good vs poor), and 319 sits in a lower cost tier (budget, $) than AL25 (standard, $$).
319Choose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
AL25Choose it when strength drives the design, or when the part sees heat.
319 vs AL25: 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
Hardness, Rockwell B
Hardness, Vickers
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
Max Service Temperature (continuous)
Min Service Temperature
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 27 % IACS · Electrical Resistivity 6.4×10⁻⁸ Ω·m2.52 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.78 V · Corrosion Resistance 35 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Castability
Brazeability / Solderability
Same in both: Formability (cold) 5 / 100 · Polishability 40 / 100
Sustainability
Primary-production footprint per kilogram.
Typical Recycled Content
Same in both: Embodied Energy (primary production) 200 MJ/kg85,985 BTU/lb · Embodied Carbon (primary production) 12 kg CO₂/kg · Embodied Water 1,200 L/kg144 gal/lb
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 | 319 | AL25 |
|---|---|---|
| CNC machining | Yes | — |
| Default condition | — | — |
| Relative cost | $ Budget | $$ Standard |
| 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.
319 vs AL25 — frequently asked
Is AL25 stronger than 319?
Yes. AL25 has a typical yield strength of 180 MPa (26.1 ksi) against 124 MPa (18 ksi) for 319 — about 45% more. Tensile strength is 200 MPa (29 ksi) vs 186 MPa (27 ksi).
Which is cheaper, 319 or AL25?
319 is the lower-cost material: it sits in the budget tier ($) while AL25 is standard ($$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, 319 or AL25?
319. Its machinability rates very good (72/100) against fair (48/100) for AL25; for welding the order is 319 first (good, 55/100) then AL25 (poor, 25/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 319 and AL25 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.