Aluminum Scalmalloy Stress Relieved vs Scalmalloy-T6
Aluminum · Scalmalloy temper comparison
Scalmalloy Stress Relieved and Scalmalloy-T6 are two conditions of the same aluminum grade, Scalmalloy: Stress Relieved versus T6 (solution heat treated and artificially aged). The chemistry is identical, so every difference below comes from the condition. Scalmalloy-T6 is the stronger of the two: yield strength 480 MPa (69.6 ksi) against 390 MPa (56.6 ksi) for Scalmalloy Stress Relieved, about 23% more; tensile strength follows at 520 MPa (75.4 ksi) vs 460 MPa (66.7 ksi). Scalmalloy-T6 is harder — 145 HB against 123 HB for Scalmalloy Stress Relieved — which matters for wear surfaces and threads. Scalmalloy-T6 conducts electricity better (30 % IACS vs 25 % IACS). On the shop floor, Scalmalloy-T6 machines more easily (good vs fair).
Scalmalloy-T6Choose it when strength drives the design, or when surface hardness matters.
Scalmalloy Stress Relieved vs Scalmalloy-T6: 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.
Scalmalloy Stress RelievedScalmalloy-T6
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 70 GPa10.2 Msi · Shear Modulus 26.5 GPa3.8 Msi · Bulk Modulus 68 GPa9.9 Msi · Poisson's Ratio 0.33 · Fracture Toughness (K_IC) 32 MPa·√m29.1 ksi·√in
Physical
Density and transition temperatures.
Same in both: Density 2.67 g/cm³0.1 lb/in³ · Melting Point (Solidus) 574°C1,065 °F · Liquidus Temperature 638°C1,180 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 900 J/kg·K0.21 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 23.5 µm/m·K13.1 µin/in·°F · Latent Heat of Fusion 390 J/g168 BTU/lb · 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).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.87 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Same in both: Weldability 60 / 100 · Castability 25 / 100 · Brazeability / Solderability 25 / 100 · Polishability 65 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 350 MJ/kg150,473 BTU/lb · Embodied Carbon (primary production) 26 kg CO₂/kg · Embodied Water 1,200 L/kg144 gal/lb · Typical Recycled Content 5%
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.
Scalmalloy Stress Relieved vs Scalmalloy-T6 — frequently asked
Is Scalmalloy-T6 stronger than Scalmalloy Stress Relieved?
Yes. Scalmalloy-T6 has a typical yield strength of 480 MPa (69.6 ksi) against 390 MPa (56.6 ksi) for Scalmalloy Stress Relieved — about 23% more. Tensile strength is 520 MPa (75.4 ksi) vs 460 MPa (66.7 ksi).
Which condition does FabDigit quote by default, Stress Relieved or T6?
As Printed is the default Scalmalloy condition in the FabDigit quote flow (neither Stress Relieved nor T6). The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
Which is easier to machine, Scalmalloy Stress Relieved or Scalmalloy-T6?
Scalmalloy-T6. Its machinability rates good (62/100) against fair (50/100) for Scalmalloy Stress Relieved.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Scalmalloy Stress Relieved and Scalmalloy-T6 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.