Magnesium Alloy MB15 FORGED-T5 vs MB15-T6
Magnesium Alloy · MB15 temper comparison
MB15 FORGED-T5 and MB15-T6 are two conditions of the same magnesium alloy grade, MB15: FORGED-T5 versus T6 (solution heat treated and artificially aged). The chemistry is identical, so every difference below comes from the condition. MB15-T6 is the stronger of the two: yield strength 285 MPa (41.3 ksi) against 230 MPa (33.4 ksi) for MB15 FORGED-T5, about 24% more; tensile strength follows at 350 MPa (50.8 ksi) vs 320 MPa (46.4 ksi). In exchange, MB15 FORGED-T5 is the more ductile: elongation 13% versus 9% for MB15-T6, and MB15-T6 is harder (88 HB vs 78 HB).
MB15 FORGED-T5Choose it when the part is bent, formed or impact-loaded.
MB15-T6Choose it when strength drives the design.
MB15 FORGED-T5 vs MB15-T6: 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.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Vickers
Same in both: Shear Modulus 16.5 GPa2.4 Msi · Bulk Modulus 45 GPa6.5 Msi · Poisson's Ratio 0.35
Physical
Density and transition temperatures.
Same in both: Density 1.8 g/cm³0.07 lb/in³ · Melting Point (Solidus) 520°C968 °F · Liquidus Temperature 635°C1,175 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 1,000 J/kg·K0.24 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 26 µm/m·K14.4 µin/in·°F · Latent Heat of Fusion 340 J/g146 BTU/lb · Max Service Temperature (continuous) 150°C302 °F · Min Service Temperature -70°C-94 °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) -1.57 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Formability (cold)
Same in both: Machinability 95 / 100 · Machinability Rating (AISI 1212 = 100 %) 480% · Weldability 25 / 100 · Castability 40 / 100 · Brazeability / Solderability 20 / 100 · Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 320 MJ/kg137,575 BTU/lb · Embodied Carbon (primary production) 32 kg CO₂/kg · Embodied Water 500 L/kg59.9 gal/lb · Typical Recycled Content 15%
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.
MB15 FORGED-T5 vs MB15-T6 — frequently asked
Is MB15-T6 stronger than MB15 FORGED-T5?
Yes. MB15-T6 has a typical yield strength of 285 MPa (41.3 ksi) against 230 MPa (33.4 ksi) for MB15 FORGED-T5 — about 24% more. Tensile strength is 350 MPa (50.8 ksi) vs 320 MPa (46.4 ksi).
Which condition does FabDigit quote by default, FORGED-T5 or T6?
T5 is the default MB15 condition in the FabDigit quote flow (neither FORGED-T5 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.
When should I choose MB15 FORGED-T5 over MB15-T6?
Pick MB15 FORGED-T5 when the part is bent, formed or impact-loaded. Pick MB15-T6 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in MB15 FORGED-T5 and MB15-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.