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(Summary description)AZ31B (3.5312, M11311) Magnesium AZ31B magnesium is a magnesium alloy. AZ31B is the ASTM designation for this material. M11311 is the UNS number. Additionally, the ISO numeric designation is WD21151. It has a very high melting temperature among the magnesium alloys in the database. The properties of AZ31B magnesium include four common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare AZ31B magnesium to other magnesium alloys (top) and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on. AZ31B-F MagnesiumAZ31B-H24 Magnesium AZ31B-H26 MagnesiumAZ31B-O Magnesium     Mechanical Properties Elastic (Young's, Tensile) Modulus     45 GPa 6.5 x 106 psi Elongation at Break     5.6 to 12 % Fatigue Strength     100 to 120 MPa 15 to 18 x 103 psi Poisson's Ratio     0.29 Shear Modulus     17 GPa 2.5 x 106 psi Shear Strength     130 to 160 MPa 19 to 23 x 103 psi Tensile Strength: Ultimate (UTS)     240 to 270 MPa 34 to 39 x 103 psi Tensile Strength: Yield (Proof)     120 to 180 MPa 18 to 26 x 103 psi   Thermal Properties Latent Heat of Fusion     350 J/g Maximum Temperature: Mechanical     150 °C 300 °F Melting Completion (Liquidus)     600 °C 1110 °F Melting Onset (Solidus)     600 °C 1120 °F Specific Heat Capacity     990 J/kg-K 0.24 BTU/lb-°F Thermal Conductivity     100 W/m-K 60 BTU/h-ft-°F Thermal Expansion     26 µm/m-K   Electrical Properties Electrical Conductivity: Equal Volume     18 % IACS Electrical Conductivity: Equal Weight (Specific)     95 % IACS   Otherwise Unclassified Properties Base Metal Price     12 % relative Density     1.7 g/cm3 110 lb/ft3 Embodied Carbon     23 kg CO2/kg material Embodied Energy     160 MJ/kg 67 x 103 BTU/lb Embodied Water     970 L/kg 120 gal/lb   Common Calculations Resilience: Ultimate (Unit Rupture Work)     13 to 25 MJ/m3 Resilience: Unit (Modulus of Resilience)     170 to 370 kJ/m3 Stiffness to Weight: Axial     15 points Stiffness to Weight: Bending     70 points Strength to Weight: Axial     39 to 44 points Strength to Weight: Bending     50 to 55 points Thermal Diffusivity     62 m2/s Thermal Shock Resistance     14 to 16 points   Alloy Composition   Magnesium (Mg)Mg   93.6 to 97.1 Aluminum (Al)Al   2.4 to 3.6 Zinc (Zn)Zn   0.5 to 1.5 Manganese (Mn)Mn   0.050 to 1.0 Silicon (Si)Si   0 to 0.1 Iron (Fe)Fe   0 to 0.050 Copper (Cu)Cu   0 to 0.050 Calcium (Ca)Ca   0 to 0.040 Nickel (Ni)Ni   0 to 0.0050 Residualsres.   0 to 0.3 All values are % weight. Ranges represent what is permitted under applicable standards.   Followup Questions How are the material properties defined?Why does this material have multiple names? How does AZ31B magnesium compare to other magnesium alloys?How does it compare to other metal alloys?   Similar Alloys AZ31C (AZ31C-F, M11312) MagnesiumISO-WD21150 (MgAl3Zn1(A)) Magnesium AM50A (AM50A-F, M10500) MagnesiumEN-MC21310 (MgAl2Si) Magnesium EN-MC21220 (MgAl5Mn) MagnesiumEN-MC21210 (MgAl2Mn) Magnesium   Further Reading ASTM B90: Standard Specification for Magnesium-Alloy Sheet and Plate ASTM B107: Standard Specification for Magnesium-Alloy Extruded Bars, Rods, Profiles, Tubes, and Wire Advances in Wrought Magnesium Alloys: Fundamentals of Processing, Properties and Applications, Colleen Bettles and Matthew Barnett (editors), 2012 ASTM B91: Standard Specification for Magnesium-Alloy Forgings ISO 3116: Magnesium and magnesium alloys - Wrought magnesium alloys Welding and Joining of Magnesium Alloys, Liming Liu (editor), 2010 Essential Readings in Magnesium Technology, Suveen N. Mathaudhu et al. (editors), 2014 Environmental Degradation of Advanced and Traditional Engineering Materials, Lloyd H. Hihara et al., 2014. Advanced Materials in Automotive Engineering, Jason Rowe (editor), 2012 Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993