A387 Gr.11 Steel Mechanical Properties and High Temperature Performance

A387 Gr.11 steel is renowned for maintaining mechanical strength and toughness at elevated temperatures. Its tensile strength of 485–620 MPa and yield strength of 275 MPa make it suitable for industrial pressure components. The steel exhibits an elongation of approximately 22%, allowing sufficient ductility for fabrication and installation.

The microstructure, typically tempered martensite, provides excellent creep resistance, fatigue strength, and thermal stability. This enables the steel to withstand repeated thermal cycles and sustained high-pressure service, which are common in boilers, heat exchangers, and piping systems.

Impact tests confirm the material's ability to absorb energy and resist fracture under load. These properties make A387 Gr.11 steel an ideal choice for power generation and petrochemical industries, where both strength and reliability are critical.

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