Knowledge

• 11/Oct2025

  How does the cooling rate affect the toughness of Q295GNH after normalization?

  For Q295GNH, standard air cooling during normalization is optimal for maximizing toughness. It balances grain refinement and phase uniformity without introducing harmful microstructures or residual st

• 11/Oct2025

  Can other heat treatment methods also improve the performance of Q295GNH?

  Other heat treatment methods can also improve specific properties of Q295GNH, though their applicability and effectiveness depend on the steel’s composition and intended performance goals.

• 11/Oct2025

  Can normalizing improve the toughness of Q295GNH?

  Normalization is a highly effective method to enhance the toughness of Q295GNH while maintaining its overall mechanical performance balance.

• 11/Oct2025

  Does the inner wall of the flower box made of Q235NH need an anti-corrosion c...

  It is not strictly necessary from a structural perspective, but applying a coating is often a very good idea to prevent potential issues and extend the box's life.

• 11/Oct2025

  Can Q355GNH improve its performance through heat treatment?

  The performance of Q355GNH can be improved through heat treatment. Q355GNH is a low-alloy high-strength weathering structural steel, typically supplied in hot-rolled, controlled-rolled, or normalized

• 10/Oct2025

  Does Q355NHA support hot-dip galvanizing treatment?

  Hot-dip galvanizing Q355NHA has specific limitations and precautions—these mainly stem from Q355NH’s alloy composition (e.g., Cu, Cr) and the high-temperature nature of the galvanizing process, which

• 10/Oct2025

  How does post-welding heat treatment affect the corrosion resistance of Q355NH?

  Post-welding heat treatment (PWHT) has a positive, indirect effect on the corrosion resistance of Q355NH’s welding heat-affected zone (HAZ)—it addresses the HAZ’s "weaknesses" from welding, helping it

• 10/Oct2025

  Can other heat treatment methods be used instead of post-welding heat treatme...

  For Q355NH, alternative heat treatment or process controls can replace post-welding heat treatment (PWHT) in specific scenarios—especially for thin plates, non-load-bearing structures, or when PWHT is

• 10/Oct2025

  How does post-welding heat treatment affect the mechanical properties of the ...

  Post-welding heat treatment (PWHT) directly improves or optimizes the mechanical properties of Q355NH’s welding heat-affected zone (HAZ), which deteriorates due to welding’s high-temperature thermal c

• 10/Oct2025

  Are there any post-welding heat treatment methods for the welding heat-affect...

  There are targeted post-welding heat treatment (PWHT) methods for the welding heat-affected zone (HAZ) of Q355NH, mainly to restore its mechanical properties (reduce brittleness, relieve residual stre