Magnesium Alloy AS41 vs AS41B
Magnesium Alloy · grade comparison
Magnesium Alloy AS41 and AS41B are both magnesium alloy grades. AS41 is the stronger of the two: tensile strength 240 MPa (34.8 ksi) against 215 MPa (31.2 ksi) for AS41B, about 12% more. AS41B is harder — 75 HB against 60 HB for AS41 — which matters for wear surfaces and threads. AS41B runs hotter in service (175°C vs 150°C continuous).
AS41Choose it when strength drives the design.
AS41BChoose it when surface hardness matters, or when the part sees heat.
AS41 vs AS41B: 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)
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
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 · Yield Strength (0.2% offset) 140 MPa20.3 ksi · Elongation at Break 6% · Compressive Strength 140 MPa20.3 ksi · Shear Strength 140 MPa20.3 ksi
Physical
Density and transition temperatures.
Same in both: Density 1.77 g/cm³0.06 lb/in³ · Melting Point (Solidus) 565°C1,049 °F · Liquidus Temperature 620°C1,148 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Thermal Conductivity 68 W/m·K39.3 BTU/hr·ft·°F · Specific Heat Capacity 1,020 J/kg·K0.24 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 26.1 µm/m·K14.5 µin/in·°F · Latent Heat of Fusion 340 J/g146 BTU/lb
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Same in both: Corrosion Resistance 30 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Weldability
Castability
Polishability
Same in both: Machinability 95 / 100 · Machinability Rating (AISI 1212 = 100 %) 400% · Formability (cold) 10 / 100 · Brazeability / Solderability 15 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Carbon (primary production)
Typical Recycled Content
Same in both: Embodied Energy (primary production) 320 MJ/kg137,575 BTU/lb · Embodied Water 500 L/kg59.9 gal/lb
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Thermal Shock Resistance Index
Same in both: Specific Stiffness (E / density) 25.4 MN·m/kg · Modulus of Resilience 218 kJ/m³ · Thermal Diffusivity 37.7 mm²/s
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.
Manufacturing and finishing
| Capability | AS41 | AS41B |
|---|---|---|
| CNC machining | — | Yes |
| Default condition | — | As Cast |
| Relative cost | $$ Standard | $$ Standard |
| Min. machined wall | — | 0.8 mm |
| Best machined surface | — | Ra 0.8 µm |
| Anodizing Type II | — | Yes |
| Chem Film (Alodine) | — | Yes |
| E-Coating | — | Yes |
| Hard Anodize Type III w/ PTFE | — | Yes |
| Hard Anodizing Type III | — | Yes |
| Painting | — | Yes |
| Powder Coating | — | Yes |
AS41 vs AS41B — frequently asked
Is AS41 stronger than AS41B?
Yes. AS41 has a typical tensile strength of 240 MPa (34.8 ksi) against 215 MPa (31.2 ksi) for AS41B — about 12% more.
Which is cheaper, AS41 or AS41B?
Both sit in the same relative cost tier ($$, standard); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, AS41 or AS41B?
AS41B. Its weldability rates fair (35/100) against poor (30/100) for AS41.
Ready to make it?
Upload a CAD file and FabDigit prices the part in AS41 and AS41B 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.