Aluminum 6061 Filamet is 65.0 - 68.5% metal by mass. Bronze Filamet is 88.0 - 90.0% metal by mass. Copper Filamet is 87.0 - 90.0% metal by mass. High Carbon Iron Filamet is 75.0 - 80.0% metal by mass. Inconel 718 Filamet is 82.0 - 85.0% metal by mass. Rapid 3DShield Tungsten Filament is 88.0 - 94.0% metal by mass. Stainless Steel 17-4 Filamet is 80.0 - 85.0% metal by mass. Stainless Steel 316L Filamet is 80.0 - 85.0% metal by mass. Titanium 64-5 Filamet is 78.0 - 82.0% metal by mass.