In the Aluminum Scandium Alloy Sheet Material market taxonomy, the "Types" dimension classifies products by scandium concentration, sheet thickness, and processing route. Scandium content is split into low (0.1‑0.5 wt %), medium (0.5‑1.0 wt %), and high (>1.0 wt %) grades; higher concentrations deliver superior grain refinement and tensile strength, attracting premium aerospace contracts, while lower grades serve cost‑sensitive automotive and industrial applications. Thickness categories include thin (<1 mm), medium (1‑3 mm), and thick (>3 mm) sheets, each aligning with specific fabrication methods—thin sheets favor stamping, medium sheets are common in extrusion‑based components, and thick sheets support structural panels. Processing routes differentiate rolled versus extruded sheets; rolled sheets dominate the aerospace and sports sectors due to tighter tolerances, whereas extruded sheets are favored in automotive chassis where longer lengths are required. The interplay of these sub‑types determines price differentials and volume distribution across the market, with higher‑grade, thin‑rolled sheets representing a smaller but higher‑value niche, and low‑grade, thick‑extruded sheets contributing larger absolute volumes.