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Elmet Technologies

Magnesium HM21A-T8, Sheet and Plate
Categories: Metal; Nonferrous Metal; Magnesium Alloy
Material Notes:

Key Words: UNS M13210; Mg
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Physical PropertiesMetricEnglishComments
Density 1.78 g/cc0.0643 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Tensile Strength, Ultimate 235 MPa34100 psi
 97.0 MPa
@Temperature 315 °C,
Time 601 sec		14100 psi
@Temperature 599 °F,
Time 0.167 hour		Sheet
 140 MPa
@Temperature 150 °C,
Time 601 sec		20300 psi
@Temperature 302 °F,
Time 0.167 hour		Sheet
 220 MPa
@Thickness 1.63 mm,
Temperature 24.0 °C		31900 psi
@Thickness 0.0640 in,
Temperature 75.2 °F		Longitudinal sheet
 235 MPa
@Thickness 6.35 mm,
Temperature 24.0 °C		34100 psi
@Thickness 0.250 in,
Temperature 75.2 °F		Longitudinal plate
 240 MPa
@Thickness 6.35 mm,
Temperature 24.0 °C		34800 psi
@Thickness 0.250 in,
Temperature 75.2 °F		Transverse plate
 265 MPa
@Thickness 6.35 mm,
Temperature -54.0 °C		38400 psi
@Thickness 0.250 in,
Temperature -65.2 °F		Longitudinal plate
 275 MPa
@Thickness 6.35 mm,
Temperature -72.0 °C		39900 psi
@Thickness 0.250 in,
Temperature -97.6 °F		Longitudinal plate
 275 MPa
@Thickness 1.63 mm,
Temperature -54.0 °C		39900 psi
@Thickness 0.0640 in,
Temperature -65.2 °F		Longitudinal sheet
 280 MPa
@Thickness 1.63 mm,
Temperature -72.0 °C		40600 psi
@Thickness 0.0640 in,
Temperature -97.6 °F		Longitudinal sheet
 325 MPa
@Thickness 6.35 mm,
Temperature -196 °C		47100 psi
@Thickness 0.250 in,
Temperature -321 °F		Longitudinal plate
 330 MPa
@Thickness 1.63 mm,
Temperature -196 °C		47900 psi
@Thickness 0.0640 in,
Temperature -321 °F		Longitudinal sheet
Tensile Strength, Yield  150 MPa
@Thickness 1.63 mm,
Temperature -72.0 °C		21800 psi
@Thickness 0.0640 in,
Temperature -97.6 °F		Longitudinal sheet
 160 MPa
@Thickness 1.63 mm,
Temperature 24.0 °C		23200 psi
@Thickness 0.0640 in,
Temperature 75.2 °F		Longitudinal sheet
 170 MPa
@Thickness 6.35 mm,
Temperature 24.0 °C		24700 psi
@Thickness 0.250 in,
Temperature 75.2 °F		Transverse plate
 170 MPa
@Thickness 1.63 mm,
Temperature -196 °C		24700 psi
@Thickness 0.0640 in,
Temperature -321 °F		Longitudinal sheet
 175 MPa
@Thickness 6.35 mm,
Temperature 24.0 °C		25400 psi
@Thickness 0.250 in,
Temperature 75.2 °F		Longitudinal plate
 175 MPa
@Thickness 1.63 mm,
Temperature -54.0 °C		25400 psi
@Thickness 0.0640 in,
Temperature -65.2 °F		Longitudinal sheet
 205 MPa
@Thickness 6.35 mm,
Temperature -54.0 °C		29700 psi
@Thickness 0.250 in,
Temperature -65.2 °F		Longitudinal plate
 210 MPa
@Thickness 6.35 mm,
Temperature -196 °C		30500 psi
@Thickness 0.250 in,
Temperature -321 °F		Longitudinal plate
 215 MPa
@Thickness 6.35 mm,
Temperature -72.0 °C		31200 psi
@Thickness 0.250 in,
Temperature -97.6 °F		Longitudinal plate
 170 MPa
@Strain 0.2 %		24700 psi
@Strain 0.2 %
Elongation at Break 11 %11 %in 50 mm
 4.0 %
@Thickness 1.63 mm,
Temperature -196 °C		4.0 %
@Thickness 0.0640 in,
Temperature -321 °F		Longitudinal sheet
 4.2 %
@Thickness 6.35 mm,
Temperature -196 °C		4.2 %
@Thickness 0.250 in,
Temperature -321 °F		Longitudinal plate
 4.7 %
@Thickness 6.35 mm,
Temperature -54.0 °C		4.7 %
@Thickness 0.250 in,
Temperature -65.2 °F		Longitudinal plate
 5.0 %
@Thickness 6.35 mm,
Temperature -72.0 °C		5.0 %
@Thickness 0.250 in,
Temperature -97.6 °F		Longitudinal plate
 5.6 %
@Thickness 6.35 mm,
Temperature 24.0 °C		5.6 %
@Thickness 0.250 in,
Temperature 75.2 °F		Longitudinal plate
 6.2 %
@Thickness 1.63 mm,
Temperature -54.0 °C		6.2 %
@Thickness 0.0640 in,
Temperature -65.2 °F		Longitudinal sheet
 7.2 %
@Thickness 1.63 mm,
Temperature 24.0 °C		7.2 %
@Thickness 0.0640 in,
Temperature 75.2 °F		Longitudinal sheet
 13.7 %
@Thickness 6.35 mm,
Temperature 24.0 °C		13.7 %
@Thickness 0.250 in,
Temperature 75.2 °F		Transverse plate
 17.5 %
@Thickness 1.63 mm,
Temperature -72.0 °C		17.5 %
@Thickness 0.0640 in,
Temperature -97.6 °F		Longitudinal sheet
Creep Strength  34.0 MPa
@Temperature 315 °C,
Time 360000 sec		4930 psi
@Temperature 599 °F,
Time 100 hour		0.2% total extension
 76.0 MPa
@Temperature 205 °C,
Time 360000 sec		11000 psi
@Temperature 401 °F,
Time 100 hour		0.2% total extension
Modulus of Elasticity  34.0 GPa
@Temperature 315 °C		4930 ksi
@Temperature 599 °F
 40.0 GPa
@Temperature 205 °C		5800 ksi
@Temperature 401 °F
Tensile Modulus 45.0 GPa6530 ksi
Compressive Yield Strength 130 MPa18900 psiat 0.2% offset
Notched Tensile Strength 230 MPa33400 psi60° V-Notch, root radius 0.0076 mm.
Ultimate Bearing Strength 415 MPa60200 psi
Bearing Yield Strength 270 MPa39200 psi
Poissons Ratio 0.350.35
Machinability 100 %100 %Relative Rating, 100=Best
Shear Modulus 17.0 GPa2470 ksi
Shear Strength 125 MPa18100 psi
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.00000500 ohm-cm0.00000500 ohm-cm
 
Thermal PropertiesMetricEnglishComments
Heat of Fusion 343 J/g148 BTU/lb
CTE, linear  26.8 µm/m-°C
@Temperature 0.000 - 100 °C		14.9 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 135 W/m-K937 BTU-in/hr-ft²-°FEstimated from trends in similar Mg alloys.
Melting Point 605 - 650 °C1120 - 1200 °F
Solidus 605 °C1120 °F
Liquidus 650 °C1200 °F
 
Processing PropertiesMetricEnglishComments
Processing Temperature 455 - 595 °C851 - 1100 °FHot Working
Annealing Temperature 455 °C851 °F
 
Component Elements PropertiesMetricEnglishComments
Magnesium, Mg 97 %97 %As Remainder
Manganese, Mn 0.45 - 1.1 %0.45 - 1.1 %
Thorium, Th 1.5 - 2.5 %1.5 - 2.5 %

References for this datasheet.

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MMHM21 / 12443




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