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Magnesium
Magnesium Elektron - Service & Innovation in Magnesium

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Magnesium Elektron Elektron® AZ31B Magnesium Extrusion Alloy, UNS M11311
Categories: Metal; Nonferrous Metal; Magnesium Alloy
Material Notes: AZ31B is a wrought magnesium base alloy with good room-temperature strength and ductility combined with corrosion resistance and weldability. Increased strength is obtained by strain hardening with a subsequent partial anneal (H24 and H26 tempers).

Applications: Sheet and plate in AZ31B find application in medium strength service at temperatures below 150°C. Diverse uses including aircraft fuselage, concrete tools, cell phone/camera/notebook computer cases, speaker cones and textile machinery can all benefit from light weight AZ31B. AZ31B is non-magnetic and has high electrical and thermal conductivity filling the requirements for RFI and EMI shielding in the electronics and computer industries. Superplastic forming of AZ31B sheet at elevated temperatures allows production of a wide variety of intricate parts for automotive uses. Monocoque construction utilizing formed sheet can be adapted to many commercial applications.

Information provided by Magnesium Elektron.
Key Words: UNS M11311; AMS 4375; AMS 4376; AMS 4377; AMS 4382; ASTM B90
Vendors: Magnesium Elektron is the world leader in high strength magnesium alloys in rolled, extruded and cast forms. Phone (303) 589-3189 or visit www.magnesium-elektron.com.

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.78 g/cc
 
Mechanical PropertiesOriginal ValueComments
Hardness, Rockwell E 67O temper
 83H24 temper
Tensile Strength at Break 30.0 MPa
@Temperature 300 °C
 95.0 MPa
@Temperature 200 °C
 200 MPa
@Temperature 100 °C
 220 MPa
@Thickness 0.500 - 1.50 mm		AZ31B-O
 220 MPa
@Thickness 1.50 - 6.30 mm		AZ31B-O
 220 MPa
@Thickness 6.30 - 7.50 mm		AZ31B-O
 235 MPa
@Thickness 25.0 - 50.0 mm		AZ31B-H24
 235 MPa
@Thickness 50.0 - 75.0 mm		AZ31B-H24
 240 MPa
@Thickness 25.0 - 50.0 mm		AZ31B-H26
 245 MPa
@Thickness 12.7 - 25.0 mm		AZ31B-H24
 255 MPa
@Thickness 9.50 - 12.7 mm		AZ31B-H24
 255 MPa
@Thickness 12.7 - 25.0 mm		AZ31B-H26
 255 MPa
@Thickness 25.0 - 75.0 mm
 260 MPa
@Thickness 6.30 - 12.7 mm		AZ31B-H26
 260 MPa
@Thickness 6.30 - 9.50 mm		AZ31B-H24
 265 MPa
@Thickness 10.0 - 25.0 mm
 270 MPa
@Thickness 0.500 - 6.30 mm		AZ31B-H24
 275 MPa
@Thickness 5.00 - 10.0 mm
 290 MPa
@Thickness 0.500 - 6.00 mm
Tensile Strength, Yield 25.0 MPa
@Strain 0.2 %,
Temperature 300 °C
 50.0 MPa
@Strain 0.2 %,
Temperature 200 °C
 150 MPa
@Strain 0.2 %,
Temperature 100 °C
 105 MPa
@Strain 0.2 %,
Thickness 1.50 - 6.30 mm		AZ31B-O
 105 MPa
@Strain 0.2 %,
Thickness 6.30 - 7.50 mm		AZ31B-O
 125 MPa
@Strain 0.2 %,
Thickness 50.0 - 75.0 mm		AZ31B-H24
 125 MPa
@Strain 0.2 %,
Thickness 0.500 - 1.50 mm		AZ31B-O
 135 MPa
@Strain 0.2 %,
Thickness 25.0 - 50.0 mm		AZ31B-H24
 145 MPa
@Strain 0.2 %,
Thickness 25.0 - 50.0 mm		AZ31B-H26
 150 MPa
@Strain 0.2 %,
Thickness 25.0 - 75.0 mm
 150 MPa
@Strain 0.2 %,
Thickness 12.7 - 25.0 mm		AZ31B-H24
 160 MPa
@Strain 0.2 %,
Thickness 12.7 - 25.0 mm		AZ31B-H26
 165 MPa
@Strain 0.2 %,
Thickness 9.50 - 12.7 mm		AZ31B-H24
 175 MPa
@Strain 0.2 %,
Thickness 10.0 - 25.0 mm
 180 MPa
@Strain 0.2 %,
Thickness 6.30 - 12.7 mm		AZ31B-H26
 180 MPa
@Strain 0.2 %,
Thickness 6.30 - 9.50 mm		AZ31B-H24
 200 MPa
@Strain 0.2 %,
Thickness 0.500 - 6.30 mm		AZ31B-H24
 200 MPa
@Strain 0.2 %,
Thickness 6.00 - 10.0 mm
 220 MPa
@Strain 0.2 %,
Thickness 0.500 - 6.00 mm
Elongation at Break 35 %
@Temperature 100 °C
 85 %
@Temperature 200 °C
 135 %
@Temperature 300 °C
 5.0 %
@Thickness 6.30 - 12.7 mm		AZ31B-H26
 5.0 %
@Thickness 12.7 - 25.0 mm		AZ31B-H26
 5.0 %
@Thickness 25.0 - 50.0 mm		AZ31B-H26
 5.0 %
@Thickness 0.500 - 6.30 mm		AZ31B-H24
 7.0 %
@Thickness 6.30 - 9.50 mm		AZ31B-H24
 7.0 %
@Thickness 9.50 - 12.7 mm		AZ31B-H24
 7.0 %
@Thickness 12.7 - 25.0 mm		AZ31B-H24
 7.0 %
@Thickness 25.0 - 50.0 mm		AZ31B-H24
 7.0 %
@Thickness 50.0 - 75.0 mm		AZ31B-H24
 8.0 %
@Thickness 6.30 - 7.50 mm		AZ31B-O
 10 %
@Thickness 0.500 - 1.50 mm		AZ31B-O
 10 %
@Thickness 1.50 - 6.30 mm		AZ31B-O
 13 %
@Thickness 0.500 - 6.00 mm,
Temperature 22.0 °C
 13 %
@Thickness 25.0 - 75.0 mm,
Temperature 22.0 °C
 15 %
@Thickness 5.00 - 10.0 mm,
Temperature 22.0 °C
 16 %
@Thickness 10.0 - 25.0 mm,
Temperature 22.0 °C
Creep Strength 10.0 MPa
@Temperature 150 °C,
Time 360000 sec		0.1% creep
 20.0 MPa
@Temperature 150 °C,
Time 36000 sec		0.1% creep
 25.0 MPa
@Temperature 150 °C,
Time 360000 sec		0.2% creep
 30.0 MPa
@Temperature 100 °C,
Time 360000 sec		0.1% creep
 35.0 MPa
@Temperature 100 °C,
Time 36000 sec		0.1% creep
 35.0 MPa
@Temperature 150 °C,
Time 36000 sec		0.2% creep
 40.0 MPa
@Temperature 150 °C,
Time 360000 sec		0.5% creep
 50.0 MPa
@Temperature 150 °C,
Time 36000 sec		0.5% creep
 50.0 MPa
@Temperature 100 °C,
Time 360000 sec		0.2% creep
 60.0 MPa
@Temperature 100 °C,
Time 36000 sec		0.2% creep
 85.0 MPa
@Temperature 100 °C,
Time 360000 sec		0.5% creep
 95.0 MPa
@Temperature 100 °C,
Time 36000 sec		0.5% creep
 102 MPa
@Temperature 100 °C,
Time 360000 sec		1% creep
 110 MPa
@Temperature 100 °C,
Time 36000 sec		1% creep
Modulus of Elasticity 45.0 GPa
Compressive Yield Strength 85.0 MPa
@Strain 0.2 %,
Thickness 50.0 - 75.0 mm
 95.0 MPa
@Strain 0.2 %,
Thickness 25.0 - 50.0 mm
 120 MPa
@Strain 0.2 %,
Thickness 10.0 - 25.0 mm
 160 MPa
@Strain 0.2 %,
Thickness 6.00 - 10.0 mm
 180 MPa
@Strain 0.2 %,
Thickness 0.500 - 6.00 mm
Poissons Ratio 0.35
Fatigue Strength 110 MPa
@# of Cycles 1.00e+7 		Cantilever bending
 125 MPa
@# of Cycles 1.00e+6 		Cantilever bending
 150 MPa
@# of Cycles 100000 		Cantilever bending
Fracture Toughness 28.0 MPa-m½KIC
Shear Strength 180 MPa
@Thickness 10.0 - 75.0 mm
 195 MPa
@Thickness 6.00 - 10.0 mm
 200 MPa
@Thickness 0.500 - 6.00 mm
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 0.00000920 ohm-cm
 
Thermal PropertiesOriginal ValueComments
CTE, linear 26.8 µm/m-°C
Specific Heat Capacity 1.04 J/g-°C
Thermal Conductivity 76.9 W/m-K
Melting Point 566 - 632 °C
Solidus 566 °C
Liquidus 632 °C
 
Component Elements PropertiesOriginal ValueComments
Aluminum, Al 2.5 - 3.5 %
Magnesium, Mg 94.2 - 96.6 %As Balance
Manganese, Mn 0.20 - 1.0 %
Zinc, Zn 0.70 - 1.3 %

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