| 1900 | US started to develop Cu-bearing steels |
| 1916 | ASTM started research of weathering steels |
| 1933 | Cor-Ten steel was developed by US Steel |
| 1941 | First standard for weathering steels (ASTM A-242) was proposed |
| 1955 | Japan started to develop weathering steels |
| 1965 | 09CuPTiRE sheet steel was developed by China |
| 1965~1980 | Japan, Germany, Britain and other European countries began to use exposed weathering steels |
| 1984 | China formulated national standard of high weathering steels |
1990 | First bridge using exposed weathering steels was built in China, weathering steels was fully used in railway vehicle manufacture |
1992 | High performance steels (HPS) was developed by US Federal Highway Administration (FHWA) for bridge building |
| 1999 | High weathering steels for JT towers were developed in China |