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Elmet Technologies

Magnesium AZ31B, Forgings
Categories: Metal; Nonferrous Metal; Magnesium Alloy

Material Notes: AZ31B and AZ31C have the same nominal composition and differ only in specification ranges. Good forgeability, medium strength, can be hammer forged, seldom used.

Key Words: UNS M11311; Mg
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Physical PropertiesMetricEnglishComments
Density 1.77 g/cc0.0639 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 5050500 kg load, 10 mm ball
Tensile Strength, Ultimate 260 MPa37700 psi
Tensile Strength, Yield 170 MPa
@Strain 0.2 %
24700 psi
@Strain 0.2 %
Elongation at Break 15 %15 %in 50 mm
Tensile Modulus 45.0 GPa6530 ksi
Poissons Ratio 0.350.35
Machinability 100 %100 %Relative Rating, 100=Best
Shear Modulus 17.0 GPa2470 ksi
Shear Strength 130 MPa18900 psi
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.00000920 ohm-cm0.00000920 ohm-cm
 
Thermal PropertiesMetricEnglishComments
Heat of Fusion 340 J/g146 BTU/lb
CTE, linear  26.0 µm/m-°C
@Temperature 0.000 - 100 °C
14.4 µin/in-°F
@Temperature 32.0 - 212 °F
 27.0 µm/m-°C
@Temperature 20.0 - 200 °C
15.0 µin/in-°F
@Temperature 68.0 - 392 °F
Estimated from similar Mg alloys
Specific Heat Capacity 1.00 J/g-°C0.239 BTU/lb-°F
Thermal Conductivity 96.0 W/m-K666 BTU-in/hr-ft²-°F
Melting Point 605 - 630 °C1120 - 1170 °F
Solidus 605 °C1120 °F
Liquidus 630 °C1170 °F
 
Processing PropertiesMetricEnglishComments
Processing Temperature 230 - 425 °C446 - 797 °FHot Working
Annealing Temperature 345 °C653 °F
 
Component Elements PropertiesMetricEnglishComments
Aluminum, Al 2.5 - 3.5 %2.5 - 3.5 %
Calcium, Ca <= 0.040 %<= 0.040 %
Copper, Cu <= 0.050 %<= 0.050 %
Iron, Fe <= 0.0050 %<= 0.0050 %
Magnesium, Mg 96 %96 %As Remainder
Manganese, Mn >= 0.20 %>= 0.20 %
Nickel, Ni <= 0.0050 %<= 0.0050 %
Silicon, Si <= 0.10 %<= 0.10 %
Zinc, Zn 0.60 - 1.4 %0.60 - 1.4 %

References for this datasheet.

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MMAZ36 / 12318

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