ASTM A106 is a specification for seamless carbon steel pipe used in high-temperature applications. The “B” and “C” suffixes refer to different grades within the ASTM A106 specification.
ASTM A106 Grade B (A106B) is the most commonly used grade and has slightly higher mechanical properties compared to Grade C. It has a minimum yield strength of 35,000 psi (240 MPa) and a minimum tensile strength of 60,000 psi (415 MPa).
ASTM A106 Grade C (A106C) is a less common grade and has lower mechanical properties compared to Grade B. It has a minimum yield strength of 30,000 psi (205 MPa) and a minimum tensile strength of 55,000 psi (380 MPa).
The choice between A106B and A106C depends on the specific requirements of the application, such as the operating temperature, pressure, and desired mechanical properties. It is important to consult the appropriate codes, standards, and engineering specifications to determine the most suitable grade for a particular project.
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