What is equivalent to S355J2 carbon steel?

S355J2 carbon steel is a low carbon, high tensile strength structural steel that is widely used in construction, machinery, and engineering applications. S355J2 plain carbon steel's equivalent materials include ASTM A572 Grade 50, Q355D, SS490, A36, etc. S355J2 carbon steel is known for its excellent toughness, weldability, and corrosion resistance. 

One such grade is ASTM A572 Grade 50, which is a high-strength, low-alloy steel with a minimum yield strength of 345 MPa and a tensile strength of 470-630 MPa. It is commonly used in construction and engineering applications and is known for its excellent weldability, formability, and toughness. A572 steel is available in several grades based on their yield strength, with A572 Grade 50 being the most common.

Another grade that is equivalent to S355J2 carbon steel is ASTM A36 steel. A36 steel is a low carbon steel with a minimum yield strength of 250 MPa and a tensile strength of 400-550 MPa. It is commonly used in structural applications, such as bridges and buildings, and is known for its excellent weldability and formability. A36 steel is also available in several grades based on their strength and chemical composition.

EN 10025-2 S355 steel is another grade that is equivalent to S355J2 carbon steel. It is a non-alloy structural steel with a minimum yield strength of 355 MPa and a tensile strength of 470-630 MPa. EN 10025-2 S355 steel is primarily used in the construction industry and is known for its high strength and excellent weldability.

In addition to these grades, there are many others that are similar to S355J2 carbon steel in terms of their mechanical properties and chemical composition. Some of these include:

- GB/T 1591 Q355D: "Q" stands for yield strength, and "355" indicates a yield strength of 355 MPa. "D" indicates that its impact toughness meets requirements at -20°C, consistent with the "J2" grade of S355J2..

- ASTM A514 Grade B: A high-strength, low-alloy steel with a minimum yield strength of 690 MPa and a tensile strength of 760-895 MPa. It is commonly used in construction and engineering applications and is known for its excellent weldability and toughness.

- ASTM A709 Grade 50: A high-strength, low-alloy steel with a minimum yield strength of 345 MPa and a tensile strength of 450-610 MPa. It is commonly used in bridge construction and is known for its excellent weldability and impact resistance.

- EN 10025-2 S275JR: A non-alloy structural steel with a minimum yield strength of 275 MPa and a tensile strength of 410-560 MPa. It is commonly used in the construction industry and is known for its excellent weldability and formability.

- EN 10025-2 S355K2: A non-alloy structural steel with a minimum yield strength of 355 MPa and a tensile strength of 450-680 MPa. It is commonly used in the construction industry and is known for its high strength and excellent weldability.

In conclusion, there are several grades of steel that are equivalent to S355J2 carbon steel in terms of their mechanical properties and chemical composition. These grades include ASTM A572, ASTM A36, EN 10025-2 S355 steel, and many others. When choosing a specific grade of steel, it is important to consider the requirements of the application and the specific properties of each grade.