Why A516Gr70 Is the Preferred Steel Plate for Boiler Applications

A516Gr70 has established itself as one of the most trusted steel plates for boiler manufacturing, thanks to its exceptional strength, notch toughness, and thermal shock resistance. Its stable performance at elevated temperatures—up to 400°C—makes it particularly well-suited for critical pressure-bearing equipment in power generation and industrial heating systems.

Widely used in power plant boilers, thermal oil heaters, and chemical process vessels, A516Gr70 ensures long-term structural integrity under demanding thermal cycles. Even in heavy thicknesses exceeding 80mm, the plate maintains uniform mechanical properties, enabling safe and effective welding without the risk of brittle fracture. This is especially important for vital boiler components such as drums, headers, tubesheets, and butt-weld flanges, where material consistency and toughness are essential.

The steel is compatible with multiple non-destructive testing (NDT) methods, including ultrasonic testing (UT) and magnetic particle testing (MT), allowing manufacturers to meet stringent inspection and quality control requirements. It is also fully compliant with ASME, EN, TUV, and other international boiler standards, making it a globally accepted material in the pressure equipment field.

Many leading boiler manufacturers have listed A516Gr70 as an approved material for long-term supply, citing its reliability, workability, and proven service record. Combined with its availability in normalized delivery condition and support for third-party inspection, A516Gr70 continues to be a cornerstone in building safe, efficient, and durable boiler systems worldwide.

A516Gr70