What is ASTM A516 Gr65 steel material?

A516 Grade 65 pressure vessel steel is a type of carbon steel. It falls under the A516 series of standards set by the American Society for Testing and Materials (ASTM). This specific standard is designated for steel plates used in the fabrication of welded pressure vessels that operate in moderate and low-temperature environments.

The A516 series of steel plates is categorized into different grades based on their tensile strength. Grade 65 is one such grade, indicating that its tensile strength ranges from 65 to 85 ksi (approximately 450 to 585 MPa).

Characteristics of A516 Grade 65 pressure vessel steel

• Excellent Toughness: This steel maintains good toughness even at low temperatures, which is crucial for the safe operation of pressure vessels in harsh conditions.

• Good Weldability: It has excellent welding properties and is compatible with various industrial welding methods. To ensure weld quality, the use of low-hydrogen consumables and appropriate welding procedures is typically recommended.

• Service Temperature Range: Primarily used for applications in moderate and low-temperature service, such as boilers, heat exchangers, and storage tanks in refineries, chemical plants, and power plants.

• Mechanical Properties: In addition to its tensile strength, A516 Grade 65 has a minimum yield strength of 35 ksi (approximately 240 MPa), allowing it to handle high-pressure environments without permanent deformation.

Chemical Composition of A516 Grade 65

The chemical makeup of A516 Grade 65 boiler steel ensures its suitability for pressure vessel fabrication.

Mechanical Properties of A516 Grade 65 pressure vessel steel 

The mechanical strength of A516 Grade 65 makes it a preferred choice for structural integrity under pressure.

Equivalent Materials for A516 Grade 65

ASTM A516 Grade 65 steel can be compared to other international standards, which is useful for global procurement and substitution.