The main added metal elements of Q500NH steel plate are nickel and copper. GB/T 4171 Q500NH is a steel grade resistant to atmospheric corrosion. When the thickness is equal to 16mm, the minimum yield strength of Q500NH is more than 500Mpa, and the minimum tensile strength is more than 600Mpa.
China GB/T 4171 Q500NH Weather Resistant Steel Plate Chemical Composition and Mechanical Property:
| Grade | C | Si | Mn | P | S | Cu | Cr | Ni |
| Q500NH | 0.12 | 0.65 | 2 | 0.025 | 0.03 | 0.20-0.55 | 0.30-1.25 | 0.12-0.65 |
| Grade | Yield Strength(MPa) | Tensile Strength(MPa) | % Elongation in 2 in.(50mm) min |
| Q500NH | 500 | 600-760 | 18 |
GB/T 4171 Q500NH weathering steel plate has good corrosion resistance and can be used as processing materials on ships, containers, and train tracks. Compared with stainless steel, it only contains trace amounts of alloying elements. The total amount of alloying elements such as phosphorus, copper, chromium, nickel, molybdenum, niobium, vanadium, titanium, etc. in weathering steel only accounts for a few percent.
