ASTM A106 Grade B is a seamless carbon steel pipe specification that is used in high-temperature service applications. It is one of the most commonly used specifications for seamless carbon steel pipes intended for use in applications where fluids and gases are transported at high temperatures and pressures.

Here are the typical chemical composition and mechanical properties for ASTM A106 Grade B seamless carbon steel pipes:

Chemical Composition (max %)

Carbon (C): 0.30%

Manganese (Mn): 0.29-1.06%

Phosphorus (P): 0.035%

Sulfur (S): 0.035%

Silicon (Si): 0.10% minimum, 0.35% maximum

Chromium (Cr): 0.40% maximum

Copper (Cu): 0.40% maximum

Molybdenum (Mo): 0.15% maximum

Nickel (Ni): 0.40% maximum

Vanadium (V): 0.08% maximum

Mechanical Properties

Tensile Strength: 415 MPa (60,000 psi) minimum

Yield Strength: 240 MPa (35,000 psi) minimum

Elongation: 30% minimum in 2 inches

These properties are for ASTM A106 Grade B seamless carbon steel pipes, which are commonly used in high-temperature applications such as refineries, plants, and boilers where fluids and gases are transported at elevated temperatures and pressures. These pipes are suitable for bending, flanging, and similar forming operations.

Key Features of ASTM A106 Grade B:

Composition: It primarily consists of carbon, manganese, phosphorus, sulfur, silicon, and traces of other elements like chromium, copper, molybdenum, nickel, and vanadium. The exact chemical composition ensures good mechanical properties and corrosion resistance.

Manufacture: ASTM A106 Grade B pipes are seamless, meaning they do not have a welded seam. This manufacturing process makes them suitable for high-pressure applications where welded pipes might not be appropriate due to potential weakness at the weld seam.

Applications: Commonly used in refineries, plants, boilers, and high-temperature service industries where pipelines need to withstand high pressures and temperatures. They are suitable for conveying fluids and gases such as oil, gas, steam, and water.

Mechanical Properties: ASTM A106 Grade B pipes have specified tensile and yield strength requirements, as well as elongation properties, which ensure their ability to withstand the stresses of high-temperature service environments.

Standards: ASTM A106 Grade B pipes conform to the ASTM A106 standard, which covers seamless carbon steel pipes for high-temperature service. The pipes are typically hot-finished or cold-drawn, ensuring uniform mechanical properties throughout the length of the pipe.

In summary, ASTM A106 Grade B seamless carbon steel pipes are widely used for their excellent mechanical properties, high strength, and suitability for high-temperature applications in various industries.