Magnesium Alloy AZ31B-F vs AZ31B-H24
Magnesium Alloy · AZ31B temper comparison
AZ31B-F and AZ31B-H24 are two conditions of the same magnesium alloy grade, AZ31B: F (as fabricated) versus H24 (strain hardened and partially annealed, half hard). The chemistry is identical, so every difference below comes from the condition. AZ31B-H24 is the stronger of the two: yield strength 220 MPa (31.9 ksi) against 200 MPa (29 ksi) for AZ31B-F, about 10% more; tensile strength follows at 290 MPa (42.1 ksi) vs 260 MPa (37.7 ksi). AZ31B-H24 is harder — 73 HB against 49 HB for AZ31B-F — which matters for wear surfaces and threads. AZ31B-F runs hotter in service (120°C vs 110°C continuous).
AZ31B-FChoose it when the part sees heat.
AZ31B-H24Choose it when strength drives the design, or when surface hardness matters.
AZ31B-F vs AZ31B-H24: 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)
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 45 GPa6.5 Msi · Shear Modulus 17 GPa2.5 Msi · Bulk Modulus 35 GPa5.1 Msi · Poisson's Ratio 0.35 · Elongation at Break 15%
Physical
Density and transition temperatures.
Same in both: Density 1.77 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 340 J/g146 BTU/lb · Min Service Temperature -80°C-112 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 18.5 % 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 25 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Weldability
Formability (cold)
Castability
Polishability
Same in both: Machinability 95 / 100 · Machinability Rating (AISI 1212 = 100 %) 400% · Brazeability / Solderability 25 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 330 MJ/kg141,875 BTU/lb · Embodied Carbon (primary production) 32 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.
AZ31B-F vs AZ31B-H24 — frequently asked
Is AZ31B-H24 stronger than AZ31B-F?
Yes. AZ31B-H24 has a typical yield strength of 220 MPa (31.9 ksi) against 200 MPa (29 ksi) for AZ31B-F — about 10% more. Tensile strength is 290 MPa (42.1 ksi) vs 260 MPa (37.7 ksi).
Which condition does FabDigit quote by default, F or H24?
O is the default AZ31B condition in the FabDigit quote flow (neither F nor H24). 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 welds better, AZ31B-F or AZ31B-H24?
AZ31B-F. Its weldability rates very good (70/100) against good (65/100) for AZ31B-H24.
Ready to make it?
Upload a CAD file and FabDigit prices the part in AZ31B-F and AZ31B-H24 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.