S355J0WP weathering steel is not designed for high-temperature applications, as its performance degrades significantly above 400–500°C. Here's a concise breakdown:
Temperature Limits:
Short-term: Up to 400°C (retains structural strength, but corrosion resistance may weaken).
Long-term: Avoid sustained exposure above 250–300°C (oxidation accelerates, and protective patina breaks down).
Comparison to Ordinary Carbon Steel:
Similar heat resistance to standard S355 steel, but loses weathering benefits at high temperatures.
Critical Notes:
For high-temperature use (e.g., chimneys, boilers), consider heat-resistant steels (e.g., ASTM A242, A588) or coatings.
Above 600°C, significant strength loss occurs, risking deformation.
