What is Q345 steel equivalent to?

Equivalent Grades of Q345 Steel:

Q345 steel, a low-alloy structural steel in China, has various equivalent grades in different international standards. Here are some common equivalents for Q345 steel:

China:

Chinese GB Standard:

Q345B (GB/T 1591-2008) and Q345C are commonly used grades within the Q345 series in China.

International Equivalents:

United States:

ASTM A572 Grade 50 is the closest equivalent to Q345 steel in the United States, offering similar properties suitable for structural applications.

Europe:

EN 10025-2 S355JR or S355J2 are European equivalents to Q345 steel, known for their structural strength and good weldability.

Japan:

JIS G3106 SM490 has similarities to Q345 steel in Japan, providing good strength and weldability for structural components.

Australia/New Zealand:

AS/NZS 3678 Grade 350 is an equivalent to Q345 steel, meeting structural steel requirements in Australia and New Zealand.

India:

IS 2062 E350 or IS 8500 FE 570 are Indian standards that can be considered as equivalents to Q345 steel, commonly used in structural applications in India.

Additional Notes:

Various grades within the Q345 series: Q345A, Q345B, Q345C, Q345D, Q345E are part of the Q345 series in Chinese standards, with each variant offering specific properties suited to different applications.

Considerations for selection: When choosing an equivalent grade for Q345 steel, factors such as mechanical properties, chemical composition, and intended application should be taken into account to ensure compatibility and adherence to relevant standards.

Each country may have its own national or industry-specific standards, so it's important to refer to appropriate cross-reference tables or databases to identify the most suitable equivalent grade based on the desired properties and usage of the material.