Magnesium Alloy AS41A vs AS41B
Magnesium Alloy · grade comparison
Magnesium Alloy AS41A and AS41B are both magnesium alloy grades. Both yield at about 140 MPa — strength does not separate them. AS41B runs hotter in service (175°C vs 150°C continuous) and AS41A conducts electricity better (19 % IACS vs 13.5 % IACS).
AS41BChoose it when the part sees heat.
AS41A 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)
Charpy V-Notch Impact (RT)
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 · Fracture Toughness (K_IC) 13 MPa·√m11.8 ksi·√in · Hardness, Brinell 75 HB
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.
Latent Heat of Fusion
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
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) -1.6 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability Rating (AISI 1212 = 100 %)
Castability
Brazeability / Solderability
Same in both: Machinability 95 / 100 · Weldability 35 / 100 · Formability (cold) 10 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Carbon (primary production)
Same in both: Embodied Energy (primary production) 320 MJ/kg137,575 BTU/lb · Embodied Water 500 L/kg59.9 gal/lb · Typical Recycled Content 30%
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 | AS41A | 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 |
AS41A vs AS41B — frequently asked
What is the difference between AS41A and AS41B?
Magnesium Alloy AS41A and AS41B are both magnesium alloy grades. Both yield at about 140 MPa — strength does not separate them. AS41B runs hotter in service (175°C vs 150°C continuous) and AS41A conducts electricity better (19 % IACS vs 13.5 % IACS).
Which is cheaper, AS41A 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.
When should I choose AS41A over AS41B?
Pick AS41B when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in AS41A 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.