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What is the diffrenrence between GGG40 and GG25?
GGG40 and GG25 refer to different grades of cast iron, with GGG40 being a type of ductile iron (also known as spheroidal graphite iron) and GG25 being a grade of gray cast iron. GGG40 has a higher tensile strength and ductility due to its microstructure, which allows for better performance under stress. In contrast, GG25 is more brittle and has lower tensile strength, making it suitable for applications where high wear resistance is required. Overall, GGG40 is typically used in applications requiring toughness and impact resistance, while GG25 is often used for components that need good machinability and wear properties.
What is the difference of GG25 and GGG-40 in butterfly valves?
GG25 and GGG-40 refer to different grades of cast iron used in the construction of butterfly valves. GG25 is a grey cast iron with a minimum tensile strength of 250 MPa, while GGG-40 is a ductile iron with a minimum tensile strength of 400 MPa, offering higher strength and impact resistance. The choice between them affects the valve's performance, durability, and suitability for specific applications, particularly in terms of pressure and temperature ratings. Generally, GGG-40 is preferred for more demanding environments due to its enhanced mechanical properties.
