Magnesium Alloy MA8-AW vs MA8-HR
Magnesium Alloy · MA8 temper comparison
MA8-AW and MA8-HR are two conditions of the same magnesium alloy grade, MA8: AW (as-welded deposit) versus HR (hot rolled). The chemistry is identical, so every difference below comes from the condition. MA8-HR is the stronger of the two: yield strength 140 MPa (20.3 ksi) against 120 MPa (17.4 ksi) for MA8-AW, about 17% more. MA8-HR is the more ductile: elongation 12% versus 8% for MA8-AW, and MA8-HR is harder (48 HB vs 42 HB).
MA8-HRChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
MA8-AW vs MA8-HR: 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
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Same in both: Elastic (Young's) Modulus 43 GPa6.2 Msi · Shear Modulus 16.5 GPa2.4 Msi · Bulk Modulus 45 GPa6.5 Msi · Poisson's Ratio 0.35
Physical
Density and transition temperatures.
Same in both: Density 1.78 g/cm³0.06 lb/in³ · Melting Point (Solidus) 648°C1,198 °F · Liquidus Temperature 651°C1,204 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 1,050 J/kg·K0.25 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 26 µm/m·K14.4 µin/in·°F · Latent Heat of Fusion 370 J/g159 BTU/lb · Max Service Temperature (continuous) 150°C302 °F · Min Service Temperature -70°C-94 °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.
Formability (cold)
Same in both: Machinability 95 / 100 · Machinability Rating (AISI 1212 = 100 %) 400% · Weldability 88 / 100 · Brazeability / Solderability 25 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 330 MJ/kg141,875 BTU/lb · Embodied Carbon (primary production) 30 kg CO₂/kg · Embodied Water 300 L/kg35.9 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.
MA8-AW vs MA8-HR — frequently asked
Is MA8-HR stronger than MA8-AW?
Yes. MA8-HR has a typical yield strength of 140 MPa (20.3 ksi) against 120 MPa (17.4 ksi) for MA8-AW — about 17% more. Tensile strength is 235 MPa (34.1 ksi) vs 230 MPa (33.4 ksi).
Which condition does FabDigit quote by default, AW or HR?
M is the default MA8 condition in the FabDigit quote flow (neither AW nor HR). 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 MA8-AW over MA8-HR?
Pick MA8-HR when strength drives the design, or when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in MA8-AW and MA8-HR 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.