Magnesium Alloy MB2 F-extruded vs MB2-O
Magnesium Alloy · MB2 temper comparison
MB2 F-extruded and MB2-O are two conditions of the same magnesium alloy grade, MB2: F-extruded (f) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. MB2 F-extruded is the stronger of the two: yield strength 170 MPa (24.7 ksi) against 150 MPa (21.8 ksi) for MB2-O, about 13% more; tensile strength follows at 260 MPa (37.7 ksi) vs 245 MPa (35.5 ksi). In exchange, MB2-O is the more ductile: elongation 21% versus 15% for MB2 F-extruded, and MB2 F-extruded is harder (55 HV vs 52 HV). MB2-O runs hotter in service (150°C vs 120°C continuous).
MB2 F-extrudedChoose it when strength drives the design.
MB2-OChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
MB2 F-extruded vs MB2-O: 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
Fatigue Strength (Endurance Limit)
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 45 GPa6.5 Msi · Shear Modulus 17 GPa2.5 Msi · Bulk Modulus 45 GPa6.5 Msi · Poisson's Ratio 0.35 · Shear Strength 130 MPa18.9 ksi · Fracture Toughness (K_IC) 18 MPa·√m16.4 ksi·√in · Charpy V-Notch Impact (RT) 5 J3.7 ft·lbf · Hardness, Brinell 49 HB · Hardness, Rockwell B 47 HRB
Physical
Density and transition temperatures.
Same in both: Density 1.78 g/cm³0.06 lb/in³ · Melting Point (Solidus) 566°C1,051 °F · Liquidus Temperature 632°C1,170 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 96 W/m·K55.5 BTU/hr·ft·°F · 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 339 J/g146 BTU/lb · Min Service Temperature -100°C-148 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 19 % IACS · Electrical Resistivity 9.2×10⁻⁸ Ω·m3.62 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -1.55 V · Corrosion Resistance 22 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Weldability
Formability (cold)
Same in both: Machinability 95 / 100 · Machinability Rating (AISI 1212 = 100 %) 400% · Castability 55 / 100 · Brazeability / Solderability 40 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 340 MJ/kg146,174 BTU/lb · Embodied Carbon (primary production) 33 kg CO₂/kg · Embodied Water 500 L/kg59.9 gal/lb · Typical Recycled Content 25%
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.
MB2 F-extruded vs MB2-O — frequently asked
Is MB2 F-extruded stronger than MB2-O?
Yes. MB2 F-extruded has a typical yield strength of 170 MPa (24.7 ksi) against 150 MPa (21.8 ksi) for MB2-O — about 13% more. Tensile strength is 260 MPa (37.7 ksi) vs 245 MPa (35.5 ksi).
Which condition does FabDigit quote by default, F-extruded or O?
H24 is the default MB2 condition in the FabDigit quote flow (neither F-extruded nor O). 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 MB2 F-extruded over MB2-O?
Pick MB2 F-extruded when strength drives the design. Pick MB2-O when the part is bent, formed or impact-loaded, or when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in MB2 F-extruded and MB2-O 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.