Knowledge

• 14/Aug2025

  Does Q550NH need to be painted or used in conjunction with other anti-corrosi...

  Q550NH weathering steel typically requires no painting due to its self-protecting patina, but supplemental anti-corrosion measures may be needed in aggressive environments (e.g., coastal areas) or for

• 14/Aug2025

  How to test the mechanical properties (yield strength, tensile strength, elon...

  The mechanical properties of Q550NH weathering steel, including yield strength (≥550 MPa), tensile strength (630-800 MPa), and elongation (≥17%), are tested according to GB/T 228.1 standards using sta

• 14/Aug2025

  After welding, will the corrosion resistance of the weld area of Q550NH weath...

  Welding can initially weaken corrosion resistance at the weld, but with correct materials and techniques, the weld area can achieve comparable performance to the base metal over time.

• 14/Aug2025

  What are the surface treatment methods for Q550NH weathering steel and how do...

  Q550NH weathering steel can be treated with natural weathering, accelerated pre-rusting, or protective coatings to enhance corrosion resistance while maintaining its structural properties. These metho

• 14/Aug2025

  Detailed Explanation Of Stainless Steel 316 Round Bar

  316 stainless steel round bar is a solid cylindrical bar made from a specific type of stainless steel known for its excellent corrosion resistance, especially in chloride-containing environments.

• 14/Aug2025

  How to Properly Maintain and Clean SS 316 Coils

  To properly maintain and clean your SS 316 coils, regularly inspect for corrosion and remove debris with a soft cloth or brush. For stubborn stains or dirt, use stainless steel cleaner or a mild soap

• 14/Aug2025

  The difference between SS 316 sheet and SS 304 sheet

  The main difference between SS 316 and SS 304 stainless steel plates is their chemical composition, and the resulting corrosion resistance. SS 316 contains molybdenum, an element that increases its re

• 14/Aug2025

  What are the yield strength and tensile strength of Q550NH weathering steel?

  Q550NH weathering steel provides a minimum yield strength of 550 MPa and tensile strength of 630-800 MPa (per GB/T 4171), combining high load-bearing capacity with atmospheric corrosion resistance for

• 14/Aug2025

  How does the impact toughness of Q550NH weathering steel change at different ...

  Q550NH weathering steel maintains good impact toughness (≥60 J) at room temperature but gradually decreases in sub-zero conditions, with a ductile-to-brittle transition typically occurring below -40°C

• 14/Aug2025

  What is the heat treatment process of Q550NH weathering steel?

  Q550NH weathering steel is typically supplied in a thermomechanically controlled processed (TMCP) or normalized state to achieve optimal strength and corrosion resistance. Post-weld heat treatment (PW