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Magnesium
Magnesium Elektron - Service & Innovation in Magnesium

Magnesium Elektron Elektron® EQ21 Magnesium Casting Alloy, UNS M18330
Categories: Metal; Nonferrous Metal; Magnesium Alloy
Material Notes: ELEKTRON EQ21 is a high strength magnesium casting alloy developed by Magnesium Elektron to have good ambient and elevated temperature properties whilst still retaining good foundry characteristics. It is a fully heat treatable magnesium alloy containing silver and rare earth metals. It is pressure tight, weldable and may be used up to temperatures of 200°C. ELEKTRON EQ21 may be used to replace ELEKTRON MSR-B with a cost saving since the silver content is reduced to 1.3%-1.7% compared with 2.0% - 3.0% in ELEKTRON MSR-B. The lower silver content reduces the cost of the basic metal content in castings and improves the price stability.

Applications: The alloys will be of interest to designers requiring good retention of properties at elevated temperatures for aerospace, automotive and military applications.

Information provided by Magnesium Elektron.
Key Words: AECMA MG-C64001; AMS 4417;ASTM B80 EQ21A-T6; BS 2970 MAG 13-TF; UNS M18330; ISO 16220 MC65220
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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Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Specific Gravity 1.81 g/cc1.81 g/cc
 
Mechanical PropertiesMetricEnglishComments
Hardness, Vickers 80 - 10580 - 105
Tensile Strength at Break >= 240 MPa>= 34800 psiMin Design Specification per BS 2970 MAG13-TF; T6 condition
 169 MPa
@Temperature 250 °C		24500 psi
@Temperature 482 °F
 191 MPa
@Temperature 200 °C		27700 psi
@Temperature 392 °F
 211 MPa
@Temperature 150 °C		30600 psi
@Temperature 302 °F
 230 MPa
@Temperature 100 °C		33400 psi
@Temperature 212 °F
 261 MPa
@Temperature 22.0 °C		37900 psi
@Temperature 71.6 °F
Tensile Strength, Yield >= 175 MPa
@Strain 0.2 %		>= 25400 psi
@Strain 0.2 %		Min Design Specification per BS 2970 MAG13-TF; T6 condition
 152 MPa
@Strain 0.2 %,
Temperature 250 °C		22000 psi
@Strain 0.2 %,
Temperature 482 °F
 170 MPa
@Strain 0.2 %,
Temperature 200 °C		24700 psi
@Strain 0.2 %,
Temperature 392 °F
 180 MPa
@Strain 0.2 %,
Temperature 150 °C		26100 psi
@Strain 0.2 %,
Temperature 302 °F
 189 MPa
@Strain 0.2 %,
Temperature 100 °C		27400 psi
@Strain 0.2 %,
Temperature 212 °F
 195 MPa
@Strain 0.2 %,
Temperature 22.0 °C		28300 psi
@Strain 0.2 %,
Temperature 71.6 °F
Elongation at Break >= 2.0 %>= 2.0 %Min Design Specification per BS 2970 MAG13-TF; T6 condition
 4.0 %
@Temperature 22.0 °C		4.0 %
@Temperature 71.6 °F
 10 %
@Temperature 100 °C		10 %
@Temperature 212 °F
 15 %
@Temperature 250 °C		15 %
@Temperature 482 °F
 16 %
@Temperature 150 °C		16 %
@Temperature 302 °F
 16 %
@Temperature 200 °C		16 %
@Temperature 392 °F
Creep Strength  17.0 MPa
@Temperature 250 °C,
Time 1.80e+6 sec		2470 psi
@Temperature 482 °F,
Time 500 hour		0.1% creep
 19.0 MPa
@Temperature 250 °C,
Time 3.60e+6 sec		2760 psi
@Temperature 482 °F,
Time 1000 hour		0.2% creep
 24.0 MPa
@Temperature 250 °C,
Time 3.60e+6 sec		3480 psi
@Temperature 482 °F,
Time 1000 hour		0.3% creep
 24.0 MPa
@Temperature 250 °C,
Time 1.80e+6 sec		3480 psi
@Temperature 482 °F,
Time 500 hour		0.2% creep
 29.0 MPa
@Temperature 250 °C,
Time 1.80e+6 sec		4210 psi
@Temperature 482 °F,
Time 500 hour		0.3% creep
 29.0 MPa
@Temperature 250 °C,
Time 360000 sec		4210 psi
@Temperature 482 °F,
Time 100 hour		0.1% creep
 36.0 MPa
@Temperature 250 °C,
Time 360000 sec		5220 psi
@Temperature 482 °F,
Time 100 hour		0.2% creep
 42.0 MPa
@Temperature 250 °C,
Time 360000 sec		6090 psi
@Temperature 482 °F,
Time 100 hour		0.3% creep
 46.0 MPa
@Temperature 250 °C,
Time 36000 sec		6670 psi
@Temperature 482 °F,
Time 10.0 hour		0.1% creep
 57.0 MPa
@Temperature 200 °C,
Time 1.80e+6 sec		8270 psi
@Temperature 392 °F,
Time 500 hour		0.1% creep
 62.0 MPa
@Temperature 200 °C,
Time 3.60e+6 sec		8990 psi
@Temperature 392 °F,
Time 1000 hour		0.2% creep
 73.0 MPa
@Temperature 200 °C,
Time 1.80e+6 sec		10600 psi
@Temperature 392 °F,
Time 500 hour		0.2% creep
 76.0 MPa
@Temperature 200 °C,
Time 3.60e+6 sec		11000 psi
@Temperature 392 °F,
Time 1000 hour		0.3% creep
 78.0 MPa
@Temperature 200 °C,
Time 360000 sec		11300 psi
@Temperature 392 °F,
Time 100 hour		0.1% creep
 88.0 MPa
@Temperature 200 °C,
Time 1.80e+6 sec		12800 psi
@Temperature 392 °F,
Time 500 hour		0.3% creep
 95.0 MPa
@Temperature 200 °C,
Time 360000 sec		13800 psi
@Temperature 392 °F,
Time 100 hour		0.2% creep
 109 MPa
@Temperature 200 °C,
Time 36000 sec		15800 psi
@Temperature 392 °F,
Time 10.0 hour		0.1% creep
 116 MPa
@Temperature 200 °C,
Time 360000 sec		16800 psi
@Temperature 392 °F,
Time 100 hour		0.3% creep
 123 MPa
@Temperature 150 °C,
Time 3.60e+6 sec		17800 psi
@Temperature 302 °F,
Time 1000 hour		0.1% creep
 128 MPa
@Temperature 150 °C,
Time 1.80e+6 sec		18600 psi
@Temperature 302 °F,
Time 500 hour		0.1% creep
 134 MPa
@Temperature 150 °C,
Time 3.60e+6 sec		19400 psi
@Temperature 302 °F,
Time 1000 hour		0.2% creep
 138 MPa
@Temperature 150 °C,
Time 360000 sec		20000 psi
@Temperature 302 °F,
Time 100 hour		0.1% creep
 140 MPa
@Temperature 150 °C,
Time 1.80e+6 sec		20300 psi
@Temperature 302 °F,
Time 500 hour		0.2% creep
 149 MPa
@Temperature 150 °C,
Time 36000 sec		21600 psi
@Temperature 302 °F,
Time 10.0 hour		0.1% creep
 152 MPa
@Temperature 150 °C,
Time 3.60e+6 sec		22000 psi
@Temperature 302 °F,
Time 1000 hour		0.3% creep
 155 MPa
@Temperature 150 °C,
Time 1.80e+6 sec		22500 psi
@Temperature 302 °F,
Time 500 hour		0.3% creep
 155 MPa
@Temperature 150 °C,
Time 360000 sec		22500 psi
@Temperature 302 °F,
Time 100 hour		0.2% creep
Modulus of Elasticity 44.0 GPa6380 ksi
Compressive Yield Strength 165 - 200 MPa
@Strain 0.2 %		23900 - 29000 psi
@Strain 0.2 %
Compressive Strength 310 - 385 MPa45000 - 55800 psi
Poissons Ratio 0.300.30
Fatigue Strength  60.0 - 70.0 MPa
@# of Cycles 5.00e+7 		8700 - 10200 psi
@# of Cycles 5.00e+7 		Rotating Bend, Notched
 100 - 110 MPa
@# of Cycles 5.00e+7 		14500 - 16000 psi
@# of Cycles 5.00e+7 		Rotating Bend, Unnotched
Fracture Toughness 16.4 MPa-m½14.9 ksi-in½KIC
Shear Strength 152 MPa22000 psi
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.00000685 ohm-cm0.00000685 ohm-cm
 
Thermal PropertiesMetricEnglishComments
CTE, linear 26.7 µm/m-°C14.8 µin/in-°F
Specific Heat Capacity 1.00 J/g-°C0.239 BTU/lb-°F
Thermal Conductivity 113 W/m-K784 BTU-in/hr-ft²-°F
Melting Point 540 - 640 °C1000 - 1180 °F
Solidus 540 °C1000 °F
Liquidus 640 °C1180 °F
Shrinkage 1.3 %1.3 %Pattern Makers Shrinkage Factor
 
Component Elements PropertiesMetricEnglishComments
Copper, Cu 0.050 - 0.10 %0.050 - 0.10 %
Magnesium, Mg 94.2 - 96.75 %94.2 - 96.75 %As Balance
Rare Earths 1.5 - 3.0 %1.5 - 3.0 %
Silver, Ag 1.3 - 1.7 %1.3 - 1.7 %
Zirconium, Zr 0.40 - 1.0 %0.40 - 1.0 %
 
Descriptive Properties
Corrosion rate285 mpyASTM B117 Salt spray test
Damping Index0.22

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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