Knowledge

• 04/Jul2025

  Does the SMA490AW require additional protection in coastal or high-salt envir...

  While SMA490AW's self-protecting patina provides excellent corrosion resistance in normal atmospheric conditions, its performance becomes significantly compromised in coastal and high-salt environment

• 04/Jul2025

  What is the corrosion resistance of SMA490AW? In what environments is it suit...

  SMA490AW weathering steel offers superior atmospheric corrosion resistance by forming a protective rust patina, eliminating the need for painting in most environments. It performs best in urban/rural

• 04/Jul2025

  Does SMA490AW need maintenance after long-term use? How to clean and repair it?

  SMA490AW weathering steel requires minimal long-term maintenance as its self-protective rust layer prevents further corrosion; only periodic inspection and localized cleaning/repair of abnormal rust a

• 04/Jul2025

  How does SMA490AW accelerate the rusting process?

  SMA490AW weathering steel accelerates rust formation through controlled alloy chemistryand environmental exposure, creating a protective patina faster than conventional steel.

• 04/Jul2025

  What are the special requirements for cutting, drilling and machining of SMA4...

  SMA490AW is a self-protecting atmospheric corrosion-resistant steel that develops an adherent rust patina, providing long-term durability for exposed structural applications without requiring protecti

• 04/Jul2025

  How to avoid stress concentration and fatigue problems during the constructio...

  SMA490AW is a high-strength weathering steel (conforming to JIS G 3114) that forms a protective rust layer, offering superior atmospheric corrosion resistance and requiring minimal maintenance, making

• 04/Jul2025

  Which industries can hot-dip galvanized DX53D, DX54D, and DX55D steel be used...

  Hot-dip galvanizing remains one of the most advanced and proven corrosion protection methods for steel.

• 03/Jul2025

  What are the advantages of SMA490AW compared with Q355B?

  SMA490AW offers superior corrosion resistance with its self-protective rust layer and higher strength compared to Q355B, making it ideal for low-maintenance outdoor structures like bridges and archite

• 03/Jul2025

  Does SMA490AW require heat treatment after welding?

  SMA490AW weathering steel does not require mandatory post-weld heat treatment (PWHT) under normal conditions. However, certain scenarios may necessitate it.

• 03/Jul2025

  How does the chemical composition of SMA490AW affect its performance?

  The chemical composition of SMA490AW weathering steel critically influences its mechanical properties, corrosion resistance, and weldability.