The usual stock cylinder material on sachs two stroke is cast iron.
Kreidler uses crome plated.


skrev i melding
ups.com...
Haaken Hveem nospam wrote:
Does anyone know some good materials too use in making of racing
cylinders
for two strokes?

The problem is that alcohol and nitro mixes create unusual high
temperatures.
It must altso tolerate punishing high revs' (20,000 rpm )

Don't know if it's useful, but model airplane engines burning alcohol &
nitro typically use an aluminum piston running in a chrome plated brass
cylinder liner (typically in an aluminum block). No rings - it's a
tight fit cold, and works out via the thermal expansion.