Stainless Steel 304H flanges are made from the alloy 304H, an austenitic stainless steel with a greater carbon content than ordinary grade 304. This increased carbon content improves high-temperature strength and creep resistance, making 304H flanges appropriate for applications with temperatures up to 870°C (1600°F). These flanges have high corrosion resistance, weldability, and formability, making them suitable for application in a variety of sectors, including chemical processing, oil and gas, food and beverage, and pharmaceuticals. Stainless Steel 304H flanges are used in pipe systems to offer tight sealing and connections, assuring dependability and lifespan even in harsh settings with high temperatures and corrosive conditions.

Chemical Composition: 304H contains higher carbon content than 304, improving its high-temperature strength and creep resistance. Maximum Service Temperature: 304H is designed for higher temperature applications, with a maximum service temperature of 870°C (1600°F) compared to 304's 815°C (1500°F). Heat Treatment: 304H typically undergoes a stabilizing heat treatment process to minimize carbide precipitation and enhance its mechanical properties. Corrosion Resistance: Both 304 and 304H offer excellent corrosion resistance in a wide range of environments, making them suitable for various industrial applications. Usage: 304H is commonly used in applications involving elevated temperatures, such as in heat exchangers, boilers, and furnace components, where its enhanced strength and creep resistance are beneficial, while 304 is suitable for general-purpose applications where high temperature strength is not a primary requirement.

The 304H stainless steel flange has a Rockwell B hardness of 83. This grade of stainless steel has a 40% area reduction and a maximum Rockwell B hardness of 92. The yield strength is 205 MPa, whereas the tensile strength is 515 MPa. The chemical composition includes manganese, nickel, chromium, silicon, and carbon. There is 40% elongation.