COR-TEN steels, often referred to as generic trademarks and sometimes written as Corten steels without hyphens, are a group of steel alloys developed to eliminate the need for paint and to develop a stable rust-like appearance after several years of exposure to weather.
The original COR-TEN received the ASTM International Standard Group standard designation A 242 (COR-TEN A). The newer ASTM grades are A 588 (COR-TEN B) and A 606 for thin sheet. All alloys are in general production and use.
Compared to carbon steel, Q310GNH steel has better corrosion resistance in the atmosphere. Compared with stainless steel, there are only trace alloying elements, and the total phosphorus, copper, chromium, nickel, molybdenum, niobium, vanadium, titanium, etc. of alloys such as weathering steel is only a few percent.
Q310GNH steel Chemical composition (Heat Analysis Max%)
| Grade | C Max | Si | Mn | P | S Max |
| Q310GNH | 0.12 | 0.1-0.4 | 0.2-0.5 | 0.07-0.12 | 0.02 |
Q310GNH steel Mechanical Property
| Grade | Yield Strength(MPa) | Tensile Strength(MPa) | % Elongation min |
| Q310GNH | 285-310 | 430-560 | 24 |
