EK21 datasheet
Magnesium Casting Alloy

Chemical Composition
	Min	Max
Zinc	0.2	0.5
Neodymiume	2.6	3.1
Gadolinium	1.0	1.7
Zirconium		Saturated
Magnesium		Remainder
Heat Treatment (All temperature in degrees centigrade). Heat to a temperature of 520 for 8 hours, then quench in water (60-80°) or polymer. Then age for 16 hours at 200° and air cool.
Mechanical Properties
0.2% Proof Stress (N/mm²)	145
Tensile Stress (N/mm²)	248
Elongation (%)	2
Brinell Hardness	65-75
Physical Properties
Specific Gravity	1.82
Coefficient of thermal expansion	25.3x 10K
Thermal conductivity	116WmK
Specific Heat	1086JkgK
Electrical Resistivity	94.6nm
(Add the missing values i.e. N/mm squared, 10 to 6K to-1, Wm to -1K to -1, Jkg to-1K to -1)