The US supports Euro style 240V with a whole family of receptacle types. They are called NEMA 6 and NEMA 2: grounded and ungrounded, with the latter being largely extinct. These carry only 2 conductors with 240V across them. In America, neutral is in the middle, so neither conductor is neutral.
NEMA 14 adds a neutral to NEMA 6 (grounded). This is useless to you, but socket is usable by ignoring neutral.
NEMA 10 adds a neutral to is NEMA 2 (ungrounded) with a neutral in the middle. You can use that too, but the lack of ground is a potentially big problem.
Ground protects equipment from ESD damage and humans from shock. There is another way to do the latter; use a GFCI (RCD) device on the supply. On 240V circuits, these are generally combined with circuit breakers, and cost about $80.
You still need circuit protection for the loads. I would not put a 9-amp European appliance on a US range circuit fused/breakered at 50A. Even if you put a NEMA 6-50 plug on it, that breaker will trip much too late to save the device or prevent a fire. So I would downsize the breaker accordingly, probably with a 20A.