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This data sheet contains approximate values that may vary with build conditions and is intended for reference and comparison purposes only. It should not be used for  
design specifications or quality control. The performance characteristics of the material can be affected (±) by, but not limited to, part design, part geometries,  
application and operating conditions. Each user is responsible for determining that the material is safe, lawful and technica lly suitable for the intended laws and  
regulations. ADDIT IVA makes no warranties of any kind, express or implied, including, but not limited to, the warranties of merchantability, fi tness for a particular use, or  
warranty against patent infringement. ADDITIVA excludes liability, however arising, for any inaccura cies in this document.  
ADDITIVA\_Scalmalloy\_rev005.docx  
Scalmalloy is an aluminium \- magnesium \- scandium alloy that offers excellent stiffness, an exceptionally high strength \-  
to \- weight ratio, superb weldability and ductility, and low density to reduce parasitic mass from non \- structural  
features. It can effectively replace high \- strength 7000 series aluminium alloys in plate or forging form. Thanks to its  
low density, Scalmalloy provides density \- specific properties that are highly competitive, even when compared with  
the strongest alternatives. Compared with other al uminium alloys used in additive manufacturing, Scalmalloy delivers  
a unique level of corrosion resistance and maintains a highly stable microstructure up to 250°C, making it suitable for  
a broad range of high \- performance applications.  
Combining high strength with excellent ductility and processability, it is the ideal material for heavily loaded  
components, which is why it is already employed in many critical applications. Scalmalloy has an established track  
record across a wide range o f fields, including a erospace, robotics, marine, and motorsport, and is an approved  
material under FIA regulations.  
Chemical composition Physical properties  
Al – Aluminium balance Relative density Approx. 99.5 %  
Mg – Magnesium 4.0÷4.9 % Density 2.67 g/cm 3  
Sc \- Scandium 0.6 ÷0.8%  
Mn – Manganese 0.3 ÷0.8%  
Zr – Zirconium 0.2÷0.5 %  
Fe – Iron ≤ 0.4 %  
Si – Silicon ≤ 0.4 %  
Zn – Zinc ≤ 0.25 % Heat Treatment (stress relief)  
Ti – Titanium ≤ 0.15 % 20°C → 325 °C 1 hour  
Cu – Copper ≤ 0.10 % 325 °C 4 hours  
325 °C → 20°C \-  
Technical data  
Typical part accuracy (quote < 150 mm) ± 0.2/0.3 mm  
Typical part accuracy (quote ≥ 150 mm) ± 0.05mm each 25mm  
Surface roughness (as \- built) Ra: 5 ÷ 9 µm  
Surface roughness (after machining / polishing) Ra < 1.6 µm  
Mechanical properties  
Mechanical data Test method As \- Built Heat Treated  
Tensile streng th (Rm)  
ASTM E8 / E8M  
(unmachined specimen, Z \- axis)  
330 ± 5 MPa 5 5 5 ± 10 MPa  
Yield strength (Rp 0.2%) 260 ± 5 MPa 51 5 ± 10 MPa  
Elongation at break 19 ± 2 % 1 4 ± 2 %  
Young’s modulus na 72 ± 3 GPa  
Hardness Hv10 na 160  
Thermal conductivity ASTM E1461 \- 13 na 95 W/m·K

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