Aluminum 319 vs 328.0
Aluminum · grade comparison
Aluminum 319 and 328.0 are both aluminum grades. 328.0 is the stronger of the two: yield strength 148 MPa (21.5 ksi) against 124 MPa (18 ksi) for 319, about 19% more; tensile strength follows at 234 MPa (33.9 ksi) vs 186 MPa (27 ksi). In exchange, 319 is the more ductile: elongation 2% versus 1% for 328.0, and 328.0 is harder (75 HB vs 70 HB). 328.0 is lighter (2.7 g/cm³ vs 2.79 g/cm³ for 319) and 319 runs hotter in service (200°C vs 175°C continuous). On the shop floor, 319 machines more easily (very good vs good), 319 welds better (good vs fair), and 319 sits in a lower cost tier (budget, $) than 328.0 (standard, $$).
319Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
328.0Choose it when strength drives the design, or when weight is the constraint.
319 vs 328.0: 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
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Compressive Strength
Same in both: Bulk Modulus 72 GPa10.4 Msi · Poisson's Ratio 0.33 · Fatigue Strength (Endurance Limit) 69 MPa10 ksi
Physical
Density and transition temperatures.
Density
Liquidus Temperature
Same in both: Melting Point (Solidus) 521°C970 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 963 J/kg·K0.23 BTU/lb·°F · Latent Heat of Fusion 389 J/g167 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
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.
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 | 319 | 328.0 |
|---|---|---|
| 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 328.0 — frequently asked
Is 328.0 stronger than 319?
Yes. 328.0 has a typical yield strength of 148 MPa (21.5 ksi) against 124 MPa (18 ksi) for 319 — about 19% more. Tensile strength is 234 MPa (33.9 ksi) vs 186 MPa (27 ksi).
Which is cheaper, 319 or 328.0?
319 is the lower-cost material: it sits in the budget tier ($) while 328.0 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 328.0?
319. Its machinability rates very good (72/100) against good (60/100) for 328.0; for welding the order is 319 first (good, 55/100) then 328.0 (fair, 35/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 319 and 328.0 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.