stainless steel t slot track

Why are there no steel version of T slot extrusions? And steel t slot track I have seen people embed steel t-slot tracks in epoxy granite tables I could embed steel plates, T-slot tracks and some aluminum extrusions steel t slot extrusion For mount on a machine or workbench 8 mm slot according to DIN 650 Made of solid cast aluminum Measure: 800x20x20mm

steel t slot plate T Slot Shape Hole Punch Steel Handheld Hanger Airplane Hole Punch Butterfly T T Slot Miter Track Jig, 10001200mm 30 Type T Slot Miter Track Jig T Screw