... mainly used for high-voltage switch connection. Widely used in various SF6 circuit breaker. Voltage grade:High voltage72. ... ,6063,2A50,5154. carbon steel, stainless steelSurface treatment: Transparent oil, rust-proof oil. Aluminum alloy forging flange 5083.5083,2A50 ... ,5A05,2A10,6061,6063,2A50,5154. carbon steel, stainless steel