Alloy C-4 is an austenitic nickel-molybdenum-chromium alloy with a low carbon, silicon, and iron content. This alloy has a significantly lower tendency to form precipitation in the temperature range between 650 and 1,040 °C(1,202 - 1,904 °F), improving its resistance to inter-crystalline corrosion. When machined perfectly, no knife line attack occurs in the heat-affected zones of awelding edge. Alloy C-4 is characterized by: Very good resistance in a broad field of corrosive media, in particular under strongly oxidizing conditions. Excellent resistance to pitting, crevice and stress corrosion.
Socket Welded Union is a pipe joint machined by the die forging of round steel or ingot, and its connection form is divided into socket welding, and socket welding is to weld the steel pipe into the socket.The varieties of spigot union are equal diameter and reduced diameter. The socket union is composed of a socket, a socket, a socket, etc., which is characterized in that there is a socket on the socket, and the socket and the socket are respectively located at both ends; Compared with the prior art, the design is reasonable, the operation is simple, the practicability is strong, and the operation quality and convenience are improved. Due to the use of socket structure, the pipe joint reduces the cost, installation, use, maintenance is very convenient, but also has a very high leakage prevention ability, very market prospects.