Magnesium Alloy LA141A-O vs LA141A-T7
Magnesium Alloy · LA141A temper comparison
LA141A-O and LA141A-T7 are two conditions of the same magnesium alloy grade, LA141A: O (annealed) versus T7 (solution heat treated and overaged (stabilized)). The chemistry is identical, so every difference below comes from the condition. LA141A-T7 is the stronger of the two: yield strength 117 MPa (17 ksi) against 95 MPa (13.8 ksi) for LA141A-O, about 23% more; tensile strength follows at 150 MPa (21.8 ksi) vs 132 MPa (19.1 ksi). In exchange, LA141A-O is the more ductile: elongation 25% versus 18% for LA141A-T7, and LA141A-T7 is harder (55 HB vs 45 HB).
LA141A-OChoose it when the part is bent, formed or impact-loaded.
LA141A-T7Choose it when strength drives the design.
LA141A-O vs LA141A-T7: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all magnesium alloy 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 magnesium alloy 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.
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 43 GPa6.2 Msi · Shear Modulus 16 GPa2.3 Msi · Bulk Modulus 38 GPa5.5 Msi · Poisson's Ratio 0.36
Physical
Density and transition temperatures.
Same in both: Density 1.35 g/cm³0.05 lb/in³ · Melting Point (Solidus) 570°C1,058 °F · Liquidus Temperature 600°C1,112 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 1,350 J/kg·K0.32 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 26.5 µm/m·K14.7 µin/in·°F · Latent Heat of Fusion 360 J/g155 BTU/lb · Max Service Temperature (continuous) 65°C149 °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).
Same in both: Galvanic Potential (seawater, vs SCE) -1.7 V · Corrosion Resistance 8 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Castability 30 / 100 · Brazeability / Solderability 15 / 100 · Polishability 45 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 400 MJ/kg171,969 BTU/lb · Embodied Carbon (primary production) 32 kg CO₂/kg · Embodied Water 500 L/kg59.9 gal/lb · Typical Recycled Content 5%
Strength versus weight
Yield strength against density for every magnesium alloy grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
LA141A-O vs LA141A-T7 — frequently asked
Is LA141A-T7 stronger than LA141A-O?
Yes. LA141A-T7 has a typical yield strength of 117 MPa (17 ksi) against 95 MPa (13.8 ksi) for LA141A-O — about 23% more. Tensile strength is 150 MPa (21.8 ksi) vs 132 MPa (19.1 ksi).
Which condition does FabDigit quote by default, O or T7?
T7 is the default LA141A condition in the FabDigit quote flow. 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.
When should I choose LA141A-O over LA141A-T7?
Pick LA141A-O when the part is bent, formed or impact-loaded. Pick LA141A-T7 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in LA141A-O and LA141A-T7 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.