Magnesium Elektron Elektron® EQ21 Magnesium Casting Alloy, UNS M18330

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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. 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

Mechanical Properties	Original Value	Comments
Hardness, Vickers	80 - 105
Tensile Strength at Break	>= 240 MPa	Min Design Specification per BS 2970 MAG13-TF; T6 condition
	169 MPa @Temperature 250 °C
	191 MPa @Temperature 200 °C
	211 MPa @Temperature 150 °C
	230 MPa @Temperature 100 °C
	261 MPa @Temperature 22.0 °C
Tensile Strength, Yield	>= 175 MPa @Strain 0.2 %	Min Design Specification per BS 2970 MAG13-TF; T6 condition
	152 MPa @Strain 0.2 %, Temperature 250 °C
	170 MPa @Strain 0.2 %, Temperature 200 °C
	180 MPa @Strain 0.2 %, Temperature 150 °C
	189 MPa @Strain 0.2 %, Temperature 100 °C
	195 MPa @Strain 0.2 %, Temperature 22.0 °C
Elongation at Break	>= 2.0 %	Min Design Specification per BS 2970 MAG13-TF; T6 condition
	4.0 % @Temperature 22.0 °C
	10 % @Temperature 100 °C
	15 % @Temperature 250 °C
	16 % @Temperature 150 °C
	16 % @Temperature 200 °C
Creep Strength	17.0 MPa @Temperature 250 °C, Time 1.80e+6 sec	0.1% creep
	19.0 MPa @Temperature 250 °C, Time 3.60e+6 sec	0.2% creep
	24.0 MPa @Temperature 250 °C, Time 3.60e+6 sec	0.3% creep
	24.0 MPa @Temperature 250 °C, Time 1.80e+6 sec	0.2% creep
	29.0 MPa @Temperature 250 °C, Time 1.80e+6 sec	0.3% creep
	29.0 MPa @Temperature 250 °C, Time 360000 sec	0.1% creep
	36.0 MPa @Temperature 250 °C, Time 360000 sec	0.2% creep
	42.0 MPa @Temperature 250 °C, Time 360000 sec	0.3% creep
	46.0 MPa @Temperature 250 °C, Time 36000 sec	0.1% creep
	57.0 MPa @Temperature 200 °C, Time 1.80e+6 sec	0.1% creep
	62.0 MPa @Temperature 200 °C, Time 3.60e+6 sec	0.2% creep
	73.0 MPa @Temperature 200 °C, Time 1.80e+6 sec	0.2% creep
	76.0 MPa @Temperature 200 °C, Time 3.60e+6 sec	0.3% creep
	78.0 MPa @Temperature 200 °C, Time 360000 sec	0.1% creep
	88.0 MPa @Temperature 200 °C, Time 1.80e+6 sec	0.3% creep
	95.0 MPa @Temperature 200 °C, Time 360000 sec	0.2% creep
	109 MPa @Temperature 200 °C, Time 36000 sec	0.1% creep
	116 MPa @Temperature 200 °C, Time 360000 sec	0.3% creep
	123 MPa @Temperature 150 °C, Time 3.60e+6 sec	0.1% creep
	128 MPa @Temperature 150 °C, Time 1.80e+6 sec	0.1% creep
	134 MPa @Temperature 150 °C, Time 3.60e+6 sec	0.2% creep
	138 MPa @Temperature 150 °C, Time 360000 sec	0.1% creep
	140 MPa @Temperature 150 °C, Time 1.80e+6 sec	0.2% creep
	149 MPa @Temperature 150 °C, Time 36000 sec	0.1% creep
	152 MPa @Temperature 150 °C, Time 3.60e+6 sec	0.3% creep
	155 MPa @Temperature 150 °C, Time 1.80e+6 sec	0.3% creep
	155 MPa @Temperature 150 °C, Time 360000 sec	0.2% creep
Modulus of Elasticity	44.0 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, Notched
	100 - 110 MPa @# of Cycles 5.00e+7	Rotating Bend, Unnotched
Fracture Toughness	16.4 MPa-m½	K_IC
Shear Strength	152 MPa

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.00000685 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	540 - 640 °C
Solidus	540 °C
Liquidus	640 °C
Shrinkage	1.3 %	Pattern Makers Shrinkage Factor

Component Elements Properties	Original Value	Comments
Copper, Cu	0.050 - 0.10 %
Magnesium, Mg	94.2 - 96.75 %	As Balance
Rare Earths	1.5 - 3.0 %
Silver, Ag	1.3 - 1.7 %
Zirconium, Zr	0.40 - 1.0 %

Descriptive Properties
Corrosion rate	285 mpy	ASTM B117 Salt spray test
Damping Index	0.22

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NMAGEL902 / 186917

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