What is the difference between ASTM A106 Grade B, A and C Pipe?

　　ASTM A106 steel pipes is a standard specification for seamless carbon steel pipes used in high-temperature services. The specification covers three different grades: A, B, and C, which differ mainly in their chemical composition and mechanical properties.

　　1. Chemical Composition:

　　Grade A has the lowest carbon content, followed by Grade B and then Grade C, which has the highest carbon content.

　　Grade A: ≤ 0.25% Carbon

　　Grade B: ≤ 0.30% Carbon

　　Grade C: ≤ 0.35% Carbon

　　2.Mechanical Properties:

　　Tensile Strength (Ultimate strength):

　　Grade A: 48,000 psi (330 MPa)

　　Grade B: 60,000 psi (415 MPa)

　　Grade C: 70,000 psi (485 MPa)

　　Yield Strength (The stress at which material begins to deform permanently):

　　Grade A: 30,000 psi (205 MPa)

　　Grade B: 35,000 psi (240 MPa)

　　Grade C: 40,000 psi (275 MPa)

　　3. Applications:

　　Grade A: Used where lower strength is acceptable, such as low-pressure piping.

　　Grade B: The most commonly used grade, suitable for higher pressure and temperature.

　　Grade C: Used for even higher pressure and temperature applications due to its higher strength.

　　ASTM A106 Grade A steel pipe has the lowest strength, while A106 Grade C has the highest strength. A106 Grade B is the most widely used due to its balance of strength and cost.For any needs on ASTM A106 Grade A, B, and C, please contact [email protected].