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Cast magnesium alloy HK31A

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Cast magnesium alloy HK31A
Chemical composition: Th=3.25%, Zr = 0.7%, Mg balance
Property Value in metric unit Value in US unit
Density 1.80 *10³ kg/m³ 112 lb/ft³
Modulus of elasticity 45 GPa 6530 ksi
Thermal expansion (20 ºC) 26.8*10-6 ºCˉ¹ 14.9*10-6 in/(in* ºF)
Specific heat capacity 1000 J/(kg*K) 0.239 BTU/(lb*ºF)
Thermal conductivity 92.0 W/(m*K) 638 BTU*in/(hr*ft²*ºF)
Electric resistivity 6.0*10-8 Ohm*m 6.0*10-6 Ohm*cm
Tensile strength (annealed) 228 MPa 33000 psi
Yield strength (annealed) 145 MPa 21000 psi
Elongation (annealed) 23 % 23 %
Shear strength (annealed) 131 MPa 19000 psi
Hardness (annealed) 55 RE 55 RE
Tensile strength (T6) 221 MPa 32000 psi
Yield strength (T6) 103 MPa 15000 psi
Elongation (T6) 8 % 8 %
Shear strength (T6) 145 MPa 21000 psi
Hardness (T6) 66 HB(500) 66 HB(500)
Annealing temperature 398 ºC 750 ºF
Solution temperature 565 ºC 1050 ºF
Aging temperature 205 ºC 400 ºF
Aging time 16 hrs. 16 hrs.
Liquidus temperature 651 ºC 1204 ºF
Solidus temperature 589 ºC 1092 ºF

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