Lex4art presents his realistic materials packs on the Blender Market.
“Real Materials” is a series of texture-based ... materials for Cycles render. All 65 of them are based on hi-res textures (average size is 4K), have decent PBR implementation and friendly interface for tweaking (no need for knowledge of nodes - just apply material to mesh and set all parameters via sliders; the catch is that UVs on meshes are required - it’s a textures after all). Currently there are seven volumes, each one dedicated to different theme:
Volume 1: Steel in different conditions - from polished to rusted.
Volume 2: Galvanized metals - mostly zinc-plated steel.
Volume 3: Copper - from simple bare metal to decorative patterns.
Volume 4: Aluminum - foil included.
Volume 5: Mostly about gold, but some platinum & silver materials too.
Volume 6: Wood in various forms.