ASTM A500 is a standard for cold-formed welded seamless steel pipes commonly used for structural purposes. It is often used to manufacture pipes for various industrial and construction structures. The corresponding Chinese standard materials are primarily Q235B or Q345B, as these materials can be similar to ASTM A500 in many applications, offering sufficient strength and durability.

Correspondence:

The common steel grades in ASTM A500 are mainly grades A, B, and C, which typically correspond to the following Chinese materials:

• Q235B: Commonly used for low to medium strength structural pipes, similar to ASTM A500 Grade B.
• Q345B: Commonly used for high-strength structural pipes, similar to ASTM A500 Grade C.

Characteristics of Chinese Materials:

• Q235B: A general carbon structural steel with good weldability, cold working ability, and moderate strength. It is suitable for general structures and buildings.
• Q345B: A low-alloy high-strength structural steel, suitable for applications that require higher strength and greater durability.

Summary:

• For ASTM A500 Grade B pipes, Q235B is the most commonly corresponding material.
• For ASTM A500 Grade C pipes, Q345B is more appropriate.

In China, cold-formed welded seamless steel pipes for structural use are typically produced and tested according to standards such as
GB/T 6728, GB/T 13793, and GB/T 3091. These standards cover steel pipes for various specifications and applications.
Below are several common Chinese standards and their applications:

1. GB/T 6728 - Cold-formed Steel Pipes

   • Usage: This standard applies to cold-formed welded steel pipes, widely used in construction, steel structures, etc.
   • Materials: Typically includes Q235B, Q345B, and other materials.
   • Application: Building structures, bridges, mechanical structures, commonly found in metro, railway, and building steel frame structures.

2. GB/T 13793 - Cold-formed Structural Steel Pipes

   • Usage: This standard applies to cold-formed welded structural steel pipes, commonly used in structures requiring high load-bearing capacity and seismic performance.
   • Materials: Includes Q235, Q345, and alloy steels.
   • Application: Widely used in power, petrochemical, construction industries, and frame structures.

3. GB/T 3091 - Welded Steel Pipes for Low-pressure Fluid Transport

   • Usage: Primarily used for welded steel pipes in low-pressure fluid transport systems, also includes some structural pipes.
   • Materials: Commonly made of Q235B.
   • Application: Mainly used for water, gas, and oil transport pipes, and can also be used for lightweight steel structures and support pipes.

4. GB/T 8162 - Seamless Steel Pipes for Structural Use

   • Usage: Suitable for seamless steel pipes used in structures requiring higher strength and greater load-bearing capacity.
   • Materials: Typically includes Q235B, Q345B, and others, suitable for high-strength and durable structural needs.
   • Application: Bridges, building steel structures, heavy machinery, and transport pipelines.

5. GB/T 8163 - Seamless Steel Pipes for Fluid Transport

   • Usage: This standard applies to seamless steel pipes used for fluid transport systems, such as the transportation of oil, natural gas, or other liquids and gases.
   • Materials: Common materials include Q235B, Q345B, and others.
   • Application: Oil, natural gas, and fluid transport pipelines, as well as some low-pressure structural applications.

Related Materials:

• Q235B: General carbon steel, widely used in general construction and structural applications, with good weldability and low cost.
• Q345B: Low-alloy high-strength structural steel, suitable for areas requiring higher strength and corrosion resistance.
• 20#, 45#: These are carbon structural steels commonly used in mechanical and structural applications requiring high strength.

If you need to choose the appropriate pipes for purchasing or production, ensure to comtact XUDSTEEL to confirm the specific material compliance.