You have to use a hardened steel Nozzle! A stainless steel Nozzle as well a brass nozzle wil wear very fast!

Transparency: Opaque
Diameter: 1.75 mm
Diameter Tolerance: ± 0.05 mm
Print Temperature Guideline: 230 – 265°C
Heatbed Temperature:  70 (for spray attachment)
Melting Temperature:
Glass Transition Temperature: ± 85° C
Ovalidity Tolerance (max): ± 5%
Density (21.5°C): 1.19 g/cc
Print Speed Guideline: Similar to PLA
Impact Strength: 7.9 KJ/m²
Tensile Modulus:
Yield Strength: 52.5 Mpa
MSDS - CarbonFil