K1A (K1A-F, M18010) Magnesium

K1A magnesium is an alloy of magnesium. It is typically furnished in the as-fabricated (no temper or treatment) condition. K1A is the ASTM designation for this material. M18010 is the UNS number.

Material Properties

Base Metal Price22 % rel

Density1.8 g/cm3 (110 lb/ft3)

Elastic (Young's, Tensile) Modulus44 GPa (6.4 x 106 psi)

Electrical Conductivity30 % IACS

Electrical Resistivity Order of Magnitude-7 10x Ω-m

Elongation at Break13 %

Melting Onset (Solidus)650 °C (1200 °F)

Modulus of Resilience (Unit Resilience)30 kJ/m3

Poisson's Ratio0.29

Shear Strength55 MPa (8.0 x 103 psi)

Solidification (Pattern Maker's) Shrinkage1.6 %

Specific Heat Capacity1040 J/kg-K

Strength to Weight Ratio100 kN-m/kg

Tensile Strength: Ultimate (UTS)180 MPa (26 x 103 psi)

Tensile Strength: Yield (Proof)51 MPa (7.4 x 103 psi)

Thermal Conductivity120 W/m-K

Thermal Diffusivity64 m2/s

Thermal Expansion27 µm/m-K

Unit Rupture Work (Ultimate Resilience)18 MJ/m3

The length of each bar compares the given value to the highest value in the database.

Alloy Composition

Magnesium (Mg)98.7 to 99.6 %

Zirconium (Zr)0.4 to 1.0 %

Residuals0 to 0.3 %

Further Reading

ASTM B403: Standard Specification for Magnesium-Alloy Investment Castings

ASTM B80: Standard Specification for Magnesium-Alloy Sand Castings

Environmental Degradation of Advanced and Traditional Engineering Materials, Lloyd H. Hihara et al., 2014.

Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993

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