What is the applicable temperature range for ASTM A516 Grade 70 boiler and pressure vessel steel plates?

Standard Safe Temperature Range: -29°C to 343°C

This is the range recommended for long-term stable operation in engineering design. Within this temperature range, the mechanical properties of the material (such as strength and toughness) can be reliably guaranteed.

Extreme Temperature Limits: -46°C to 538°C

Lower Temperature Limit (-46°C): By using steel plates supplied in the normalised condition (commonly referred to as Gr.70N), the material can meet impact toughness requirements down to -46°C.

Upper Temperature Limit (538°C): According to ASME codes, the maximum permissible service temperature for this material in non-corrosive environments is 538°C.