A106 Gr B and A333 Gr 6 are two different grades of carbon steel pipes that are designed for different applications. Here are some of the key differences between A106 Gr B and A333 Gr 6:

ASTM A333 GR.6

ASTM A333 GR.6 is a specification for seamless and welded carbon and alloy steel pipes designed for low-temperature service. This standard is primarily used for pipes that need to withstand the stresses and impacts associated with cryogenic, refrigeration, and other low-temperature applications. The key characteristics of ASTM A333 GR.6 include excellent impact toughness, resistance to brittle fracture, and suitability for welding .

ASTM A106 GR B

ASTM A106 GR B, on the other hand, is a specification for seamless carbon steel pipes intended for high-temperature service. This standard is widely used in applications such as boilers, pressure vessels, and process piping systems where the pipes are subjected to high temperatures and pressures. The primary characteristics of ASTM A106 GR B include high-temperature strength, creep resistance, and the ability to withstand thermal stresses (Tuttle, 2018).

Chemical composition: The chemical composition of A106 Gr B and A333 Gr 6 is only slightly different in terms of maximum values for elements like Phosphorus, Sulfur, Chromium, and Molybdenum. In A106-B material the maximum allowed range for these elements are slightly higher than that of A333-6 material.

Mechanical properties: The mechanical properties of the two grades are also the same. Both A106 Gr B and A333 Gr 6 have a minimum tensile strength of 60,000 psi and a minimum yield strength of 35,000 psi.

Manufacturing method: A106 Gr B pipes are typically manufactured by the seamless method, while A333 Gr 6 pipes can be made using either seamless or welded methods. This is the main major difference between A106-B and A333-6.

Overall, the choice between A106 Gr B and A333 Gr 6 will depend on the specific requirements of the application, particularly the temperature at which the pipe will be used.