The steel grades with the best weathering properties are S355JOWP, S355J2JOWP and Corten A. However, these steel grades have lower impact strength than other weathering steels due to the use of lin as an alloying element. These weathering steels are best suited for steel sheet construction where there is no risk of brittle fracture.
When the risk of brittle fracture has to be considered in the design due to high material thickness, low operating temperature or other reasons, other EN 10155 steels or Corten B are preferred. In this way, the impact strength requirements of hot-rolled steel can be agreed with those of general steel structures.
At temperatures above 540°C, S355J0WP, S355J2WP, Corten A and Corten B have significantly higher spalling resistance than general structural steels.
| ASTM | |||
| Corten-A | Corten-B | ||
| A588Gr.A | A588Gr.B | A588Gr.C | |
| A242 | A709 Gr.50W | ||
| ASME | |||
| SA588 Gr.A | SA588 Gr.B | SA588 Gr.C | SA588 Gr.K |
| SA871 Type I Gr.60 | SA871 Type I Gr.65 | SA871 Type II Gr.60 | |
| SA871 Type II Gr.65 | SA871 Type III Gr.60 | SA871 Type III Gr.65 | |
| EN | |||
| S235J2W | S355J2WP | S355J0W | S355J0WP |
| S355J2G1W | S355J2G2W | S355K2G1W | S355K2G2W |
| JIS | |||
| SPA-H | SMA400AW | SMA400BW | SMA490AW |
| SMA490BW | SMA490CW | SMA50AW | SMA50CP |
| UNI | |||
| Fe360DKI | Fe510C1KI | Fe510D1KI | Fe510C2KI |
| Fe510D2KI | WR50A | WR50B | WR50C |
| NFA | |||
| E24W4 | E36WA3 | E36WA4 | E36WB3 |
| E36WB4 | WTSt37-3 | WTSt52-3 | |
| GB | |||
| 09CuPCrNi-A | Q235NH | Q355NH | Q355qC |
| Q355qD | Q345qE | ||
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