Magnesium Elektron Elektron® QE22 Magnesium Casting Alloy, UNS M18220

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Magnesium Elektron Elektron® QE22 Magnesium Casting Alloy, UNS M18220
Categories:	Metal; Nonferrous Metal; Magnesium Alloy
Material Notes:	ELEKTRON QE22 is a high strength magnesium casting alloy developed by Magnesium Elektron to have good ambient and elevated temperature properties whilst 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. 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-C-51; AFNOR G-Ag2.5TR; MOD DTD 5035A; UNS M18220; ISO 16220 MC65210
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. Click here to view all available suppliers for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
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Physical Properties	Original Value	Comments

Specific Gravity	1.81 g/cc
Bulk Density	0.0658 lb/in³	Value supplied by MatWeb

Mechanical Properties	Original Value	Comments
Hardness, Vickers	80 - 105
Tensile Strength at Break	>= 240 MPa	Min Design Specification
	266 MPa @Temperature 20.0 °C
Tensile Strength, Yield	>= 175 MPa @Strain 0.1 %	Min Design Specification
	205 MPa @Strain 0.2 %, Temperature 20.0 °C
Elongation at Break	>= 2.0 %	Min Design Specification
	4.0 % @Temperature 22.0 °C	in 5.65 A^½
Modulus of Elasticity	44.1 GPa
Compressive Yield Strength	165 - 200 MPa @Strain 0.2 %
Compressive Strength	310 - 385 MPa
Poissons Ratio	0.30
Fatigue Strength	60.0 - 70.0 MPa @# of Cycles 5.00e+7	Rotating bend; semi-circular notch, radius 1.2 mm
	90.0 - 100 MPa @# of Cycles 5.00e+7	Rotating bend
	100 - 110 MPa @# of Cycles 5.00e+7	Unnotched Rotating Bend
Fracture Toughness	14.9 MPa-m½	K_IC
Shear Strength	152 MPa

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.00000680 ohm-cm

Thermal Properties	Original Value	Comments
CTE, linear	26.7 µm/m-°C
Specific Heat Capacity	1.00 J/g-°C
Thermal Conductivity	113 W/m-K
Melting Point	550 - 640 °C
Solidus	550 °C
Liquidus	640 °C
Maximum Service Temperature, Air	200 °C
Shrinkage	1.3 %	Pattern Makers Shrinkage Factor

Component Elements Properties	Original Value	Comments
Magnesium, Mg	93.3 - 95.6 %	As Balance
Rare Earths	2.0 - 3.0 %
Silver, Ag	2.0 - 2.7 %
Zirconium, Zr	0.40 - 1.0 %

Descriptive Properties
Corrosion rate	430 mpy	ASTM B117 Salt spray test
Damping Index	0.4

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NMAGEL904 / 186919

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