Magnesium Alloy AS41B vs MC3
Magnesium Alloy · grade comparison
Magnesium Alloy AS41B and MC3 are both magnesium alloy grades. MC3 is the stronger of the two: yield strength 165 MPa (23.9 ksi) against 140 MPa (20.3 ksi) for AS41B, about 18% more; tensile strength follows at 275 MPa (39.9 ksi) vs 215 MPa (31.2 ksi). In exchange, AS41B is the more ductile: elongation 6% versus 3.5% for MC3, and AS41B is harder (75 HB vs 65 HB). AS41B runs hotter in service (175°C vs 150°C continuous) and MC3 conducts heat better (109 W/m·K vs 68 W/m·K). On the shop floor, AS41B sits in a lower cost tier (standard, $$) than MC3 (high, $$$$).
AS41BChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
MC3Choose it when strength drives the design.
AS41B vs MC3: 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
Shear Strength
Fracture Toughness (K_IC)
Hardness, Brinell
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 · Fatigue Strength (Endurance Limit) 70 MPa10.2 ksi · Charpy V-Notch Impact (RT) 3 J2.2 ft·lbf
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Max Service Temperature (continuous)
Min Service Temperature
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Same in both: Machinability 95 / 100 · Machinability Rating (AISI 1212 = 100 %) 400% · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Typical Recycled Content
Same in both: Embodied Carbon (primary production) 32 kg CO₂/kg · Embodied Water 500 L/kg59.9 gal/lb
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
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 | AS41B | MC3 |
|---|---|---|
| CNC machining | Yes | — |
| Default condition | As Cast | — |
| Relative cost | $$ Standard | $$$$ High |
| Min. machined wall | 0.8 mm | — |
| Best machined surface | Ra 0.8 µm | — |
| Anodizing Type II | Yes | — |
| Chem Film (Alodine) | Yes | — |
| E-Coating | Yes | — |
| Hard Anodize Type III w/ PTFE | Yes | — |
| Hard Anodizing Type III | Yes | — |
| Painting | Yes | — |
| Powder Coating | Yes | — |
AS41B vs MC3 — frequently asked
Is MC3 stronger than AS41B?
Yes. MC3 has a typical yield strength of 165 MPa (23.9 ksi) against 140 MPa (20.3 ksi) for AS41B — about 18% more. Tensile strength is 275 MPa (39.9 ksi) vs 215 MPa (31.2 ksi).
Which is cheaper, AS41B or MC3?
AS41B is the lower-cost material: it sits in the standard tier ($$) while MC3 is high ($$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which welds better, AS41B or MC3?
AS41B. Its weldability rates fair (35/100) against poor (30/100) for MC3.
Ready to make it?
Upload a CAD file and FabDigit prices the part in AS41B and MC3 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.